Close tolerance bolts, designed with a greater emphasis on measurement accuracy than other types of bolts, are commonly used in the aerospace manufacturing industry. They are threaded fasteners with a shank and head and a tolerance of just +0.000, -0.0005 inch as an acceptable range of variance. The shank is threaded, thus allowing them to be driven into a threaded hole. They intend to eliminate problems appearing when using traditional bolts which have a greater acceptable range of variance. Close tolerance bolts have closer shank tolerances than that of traditional bolts and fit more securely in threaded holes. For some fastening applications, traditional bolts may suffice. For sensitive fastening applications in which precision is required, close tolerance bolts are typically used. When selecting close tolerance instead of traditional bolts the drive type should be considered. Most close tolerance bolts have a recess within their head that supports a specific bit, such as a Phillips head bit. Regarding their threading, all close tolerance bolts, as well as traditional bolts, have threading. But the way in which the threading is designed may vary. Some bolts have more threading on their shank than others, and some bolts have finer threading than others.

Close tolerance bolts are offered in different materials with high-carbon steel being a common material used in their construction. 

Army & Navy (AN) close tolerance bolts are offered as part of our own labelled (AVIATIONEU NEW ERA) lines of fasteners. They are sourced from quality manufacturers and structured in different series (AN 173/174/175/176/178/180).

The following letters after the basic part numbers specify the material, finish and drilling condition of these bolts.

First Number after AN Basic designates the Diameter. 

"-" for Steel, Cad II plated, no head hole

"C" in place of (-) for Corrosion Resistant Steel (CRES)

"H" in place of (-) or after (C) for bolts with a head hole

"A" In the end of the PN  for bolts with no shank hole

National Aerospace Standard (NAS) machine bolts are commonly used in aircraft, space shuttles, military vehicles, drones, and other high-performance applications. They are offered in different series to meet application requirements.

NAS 6603 Series Steel Cadmium Plated Shear Hex Head Machine Bolts are offered as part of our own labelled (AVIATIONEU NEW ERA) lines of  fasteners. Sourced from quality manufacturers, AVIATIONEU NEW ERA NAS6604 series shear hexagon head bolts conform to the respective U.S. National Aerospace Standard of the Aerospace Industries' Association. They have a 10-32 thread and a nominal grip diameter of 0.1900 inch. NAS6603 series forms part of NAS family of bolts (NAS6603 through NAS6610 series) which includes hex head, close tolerance, alloy steel, long thread, self-locking & non-locking bolts. Their shearing feature is used to minimize damage to more critical components within the application. They are made from alloy steel with cadmium or chromium finishes and offered  in different grips and lengths in inches with undrilled or drilled head and/or shank. Used in applications where a premium-quality, high strength bolt is necessary. The following letters after the basic part numbers specify the material, finish and drilling condition of these bolts.

No Finish Code for cadmium plated bolts

"C" for chromium plated bolts

"D" for drilled shank bolts

"L" for self-locking bolts

"P" for self-locking bolt with patch type locking element

"H" for bolts with drilled head

More than one code letters may be used in sequence.

National Aerospace Standard (NAS) machine bolts are commonly used in aircraft, space shuttles, military vehicles, drones, and other high-performance applications. They are offered in different series to meet application requirements.

Those of NAS 6203 through NAS 6220 series, superseding their NAS 11(xx) counterparts, are tension hexagon head high strength close tolerance short-thread alloy steel bolts with a minimum tensile strength of 160,000 psi and a minimum shear strength of 95,000 psi. 

They are made from different steel alloys such as 4140 (UNS G41400) or  4340 (UNS G43406) with either Cadmium Plate  Type II, Class 2 or Chromium Plate on shank only with all other surfaces cadmium plated.

Depending on the series they come in different nominal diameters in inches (e.g. NAS 6203 0.1875" (3/16"), NAS 6204 0.25" (1/4"), NAS 6205  0.3125" (5/16"), NAS 6206 0.375" (3/8"), NAS 6208 0.500" 1/2") or NAS 6210 0.625" (5/8") grips (in 1/16” increments beginning at 1/16”), thread and overall fastener lengths. They can be supplied undrilled or with drilled head and/or thread and with or without locking elements (nylon or equivalent). Sourced from quality manufacturers, these bolts are listed according to their series, and offered either as OEM parts or as parts of our own labelled (AVIATIONEU NEW ERA) product lines (see the respective listings). Sold in pieces or packs of specified number of bolts per pack designated by the number after the letters "PK" in the product reference code (SKU).

The following letters after the basic part numbers specify the material, finish, drilling condition, and self-locking capability of these bolts.

No Finish Code for Cadmium II plated bolts

"C" for Chromium plated bolts (shank only)

"L" for Self-locking bolts

"P" for Self-locking bolts with patch type locking element only

Grip Dash Number indicating grip in .0625 increments

"D" after the grip dash number for drilled thread bolts

"H" after the grip dash number for bolts with drilled head

More than one code letters may be used in sequence.

PN Examples:

NAS6204-10 - NAS 6204 Series Bolt, .2500-28 Thread, .625 Grip, Undrilled, Non-locking, Alloy Steel Cadmium II Plated.

NAS6204-10D - Same bolt as above with Drilled Thread.

For more information, please refer to the supplied documentation or contact us.

AVIATIONEU NEW ERA Hexagon Socket Head Screws are made of Carbon Steel, Alloy Steel with a Black Oxide or Galvanized finish (depending on the P/N) and a strength class of 4.8 or other as specified by the letter "S" in the P/N. They are fully threaded, coarse type, and produced by certified manufacturers in accordance with DIN 7984 standard. They are offered in competitive prices in different diameters ("M" designated), indicating the screw's diameter in mm and lengths in mm. The thread pitch (the distance between threads measured along the length of the screw) expressed in mm is indicated by the "P" designation in the P/N. Sold in packs of 500, 250 or  50 pieces depending on the selected product. The number of pieces included in each pack is mentioned after "PK" designation.

AN 22 Series Clevis bolts are available in NEW SURPLUS condition. Availability till stock exhaustion. They are special-purpose bolts with a a slotted brazier type head and used where a large shearing stress occurs (never in tension). Available with drilled or undrilled shank (designated by the letter "A" after the dash number for undrilled shank). 

AN Clevis bolts are manufactured from nickel steel alloy, SAE 2330 and cadmium plated in same manner as AN3 - AN8 aircraft bolts.They are special-purpose bolts with a a slotted brazier type head and used where a large shearing stress occurs (never in tension). Minimum tensile strength 125,000 PSI. They are available with drilled or undrilled shank (designated by the letter "A" after the dash number for undrilled shank). For the AN12-AN23 bolts the second digit denotes the fine thread machine screw size (e.g. for AN21 the size is 6-40, for AN22 8-36 and for AN23 10-32). For the AN24-AN36 bolts the second digit denotes the diameter in 1/16 inch increments (AN25 has a diameter of 5/16 inch).

ROTAX® aircraft  engines form part of the product portfolio  of BRP-Powertrain GmbH & Co. KG which develops and manufactures engines for snowmobiles, watercrafts, boats, roadsters, all-terrain and side-by-side vehicles, motorcycles, carts, and aircrafts.

BRP-ROTAX® product range includes certified and non certified internal combustion engines, parts and accessories for light and ultralight aircraft.

Different screws, such as hexagonal, allen, fixation and others are used in BRP-ROTAX® aircraft engines (please refer to the respective product presentations). They come in various sizes (mostly Metric) and are offered as certified or non certified parts from the manufacturer. Non certified parts can be used in ultralights or other aircraft not requiring certification of parts for their installation. Certified parts are designated by the letters "CERT" after the part number in the product reference number (SKU).

Aircraft engine  parts are subject to changes from time to time. Some parts may be no longer available or replaced by others with different part numbers. Listed BRP-ROTAX® engine parts do not imply their current availability or suitability for your engine application. Always consult the most recent Illustrated Part Catalogs (IPCs) or other documentation available from the manufacturer for the correct part number before ordering.

Boeing & Airbus, the two leading airframe builders, have developed specifications for fasteners, hardware and other parts manufactured by different companies. Compliance with  Boeing (aka BAC) and Airbus (aka ASNA) Standards is a  prerequisite for installation or use of these parts on their respective aircraft. In many cases, Boeing & Airbus fasteners and other parts have the same fit, form, and function and they are considered as alternatives or substitutes to the respective parts designed and/or manufactured by industry leaders such as HI-SHEAR  or HOWMET in the case of fastening products.They also conform to widely accepted Military & Aerospace Standards such as AN, MS, NAS and others. However, caution is required as, depending on their series & conforming standard, fasteners are offered in Imperial (in.), Metric (mm) systems, or  both, with resulting variations in their dimensions and units of measurement of their properties.

As a result of the extensive portfolio of fastening products (including screws and bolts, nuts, washers, pins, rivets, clamps, and many others) from different leading suppliers, and those falling under Boeing, Airbus, Military and Aerospace Standards, these are listed separately in our Web Platform for Supplies.  It must be noted that, depending on the intended application, usually more than one options are available to prospective buyers and selection is finally made, apart from specifications, on the basis of price or lead time required for non-stock parts. Whenever possible,correlation tables and other information and documentation is provided to facilitate the users' awareness on interchangeability of offered fasteners and the selection of the right parts for their intended application. For additional information please contact us.

National Aerospace Standard (NAS) machine bolts are commonly used in aircraft, space shuttles, military vehicles, drones, and other high-performance applications. They are offered in different series to meet application requirements.

Those of NAS 6203 through NAS 6220 series, superseding their NAS 11(xx) counterparts, are tension hexagon head high strength close tolerance short-thread alloy steel bolts with a minimum tensile strength of 160,000 psi and a minimum shear strength of 95,000 psi. 

They are made from different steel alloys such as 4140 (UNS G41400) or  4340 (UNS G43406) with either Cadmium Plate  Type II, Class 2 or Chromium Plate on shank only with all other surfaces cadmium plated.

Depending on the series they come in different nominal diameters in inches (e.g. NAS 6203 0.1875" (3/16"), NAS 6204 0.25" (1/4"), NAS 6205  0.3125" (5/16"), NAS 6206 0.375" (3/8"), NAS 6208 0.500" 1/2") or NAS 6210 0.625" (5/8") grips (in 1/16” increments beginning at 1/16”), thread and overall fastener lengths. They can be supplied undrilled or with drilled head and/or thread and with or without locking elements (nylon or equivalent). Sourced from quality manufacturers, these bolts are listed according to their series, and offered either as OEM parts or as parts of our own labelled (AVIATIONEU NEW ERA) product lines (see the respective listings). Sold in pieces or packs of specified number of bolts per pack designated by the number after the letters "PK" in the product reference code (SKU).

The following letters after the basic part numbers specify the material, finish, drilling condition, and self-locking capability of these bolts.

No Finish Code for Cadmium II plated bolts

"C" for Chromium plated bolts (shank only)

"L" for Self-locking bolts

"P" for Self-locking bolts with patch type locking element only

Grip Dash Number indicating grip in .0625 increments

"D" after the grip dash number for drilled thread bolts

"H" after the grip dash number for bolts with drilled head

More than one code letters may be used in sequence.

PN Examples:

NAS6204-10 - NAS 6204 Series Bolt, .2500-28 Thread, .625 Grip, Undrilled, Non-locking, Alloy Steel Cadmium II Plated.

NAS6204-10D - Same bolt as above with Drilled Thread.

For more information, please refer to the supplied documentation or contact us.

Tapping screws eliminate the need for drilled holes, as they are designed to cut their own hole as it is screwed into the materials. They are commonly used  in cases when the material is too thin (e.g. sheet metals), there is no rear access for installation of  a nut or when disassembly is required at a later stage and therefore blind rivets can not be an alternative. Sourced from quality producers, tapping screws are offered as part of our own labelled (AVIATIONEU NEW ERA) product lines conforming to aerospace/military or industrial standards/specifications. 

AVIATIONEU NEW ERA AN530 series screws are mil spec tapping screws offered in different sizes and sold in packs. Those with a Philips recessed head are indicated by the letter "R" in the product part number. Tapping screws conforming to ASME specifications are also available as part of AVIATIONEU NEW ERA product portfolio (see separate product presentation). The number of screws per package is indicated after the letters "PK" in the product reference number (SKU). For more information, please refer to the individual product presentations, the supplied documentation or contact us.

European Standards (EN) and other deliverables are developed in a large number of sectors by the CEN National Standardization Bodies and CENELEC's National Committees (NCs) of the EU and EFTA countries. Together with the European Telecommunications Standards Institute (ETSI) they are the three European Standardisation Organisations operating under the Regulation (EU) No 1025/2012 to produce European harmonised standards in support of EU legislation and policies.

EN 6114 & EN 6115 Standards relate to short thread countersunk & protruding head bolts respectively for aerospace applications. EN6114 & EN 6115 Standard bolts are commonly used on Airbus commercial aircraft platforns such as A320, A330, A350 and A380. Airbus A320/ A330 aicraft commonly use the alloy steel versions of the EN6114 Standard bolts and those of the Titanium series indicated by the V and T surface coding. The Airbus A350 and A380 models incorporate those from INCONEL®  nickel-chromium-based superalloy. Several HLT, HST, NSA, and VL fasteners can be used as alternates to those of EN6114 Standard (see the supplied documentation).

Sourced from various manufacturers in different materials (steel, titanium or INCONEL® alloys), coatings and sizes, the EN 6114 & EN 6115 Standard bolts are offered as OEM parts of their respective suppliers or as part our own labelled (AVIATIONEU NEW ERA) product lines. Different material letter codes in the part number indicate the material used (e.g. " V" and "T" for Titanium or "L" and "M" for Inconel®). They are sold in packs with the number of bolts included in each pack designated after the letters "PK" in the product reference number (SKU). For additional information please refer to our brochure in our Attachment section

Machine screws are one of the more widely used products among dozens of standard fastener types. They can be either coarse-threaded or fine-threaded, and are usually available with a wide range of head types. Usually stronger than many other screw types, they are used for fastening metal parts and panels securely together in a range of construction and other applications including aerospace, machinery, vehicles, engines, tool assemblies, electronic devices, and large-scale industrial equipment. 

Sourced from quality producers,  machine screws are offered as part of our own branded (AVIATIONEU NEW ERA) product lines conforming to aerospace/military or industrial standards/specifications. They come in different sizes, head types, materials and thread gradings.

Machine sccrews meeting National Aerospace Standards (NAS), developed and maintained by the US Aerospace Industries Association (AIA), are offered in different series.  

AVIATIONEU NEW ERA AIA NAS 623 Series are aeronautical standard non structural pan head cross recess short thread machine screws. They are made from alloy steels 4140 (UNS G41400)  per MIL-S-5626, 4340 (UNS G43400)  per MIL-S-5000 or 8740 (UNS G87400 per MIL-S-6049. They are cadmium plated per QQ-P-416 Type II, Class 2. Heat treatment 160,000 to 180,000 psi ultimate tensile streangth in accordance with SPEC-MIL-H-6875.They are offered in different thread sizes, grips and lengths in inches and sold in pieces or convenient packs of specified number of screws per pack indicated by the number after the letters "PK" in the product reference number (SKU).

For more information, please refer to the supplied documentation or contact us.

Machine screws are one of the more widely used products among dozens of standard fastener types. They can be either coarse-threaded or fine-threaded, and are usually available with a wide range of head types. Usually stronger than many other screw types, they are used for fastening metal parts and panels securely together in a range of construction and other applications including aerospace, machinery, vehicles, engines, tool assemblies, electronic devices, and large-scale industrial equipment. 

Sourced from quality producers,  machine screws are offered as part of our own labelled (AVIATIONEU NEW ERA) product lines conforming to aerospace/military or industrial standards/specifications. They come in different sizes, head types, materials and thread gradings. 

Machine sccrews meeting National Aerospace Standards (NAS), developed and maintained by the US Aerospace Industries Association (AIA), come in different types and sizes structured in different series, including:

NAS 1101, 1102, 1189, 1190, 1191, 1635, 1801, 1802, 220, 229, 333,  514,  517, 560, 583, 600, 623 και NAS 662.

The NAS 583 series are non structural machine screws are flush head close tolerance machine screws made of aeronautical 100 deg. alloy steel and cadmium plated.  Offered in different thread sizes and lengths in inches as OEM parts of respective manufacturers or as parts of AVIATIONEU NEW ERA product lines. Sold mostly in packs with number of pieces per pack specified after the letters "PK" in the product reference number (SKU). For more information, please refer to the supplied documentation or contact us. 

AVIATIONEU NEW ERA ASTM A324 Grade 10.9 Series high tensile hexagonal head threaded bolts are produced from medium carbon steel, medium carbon steel alloy and low carbon boron steel with heat treatment by both quenching and tempering.  They meet ASTM A324 Grade BD and SAE J429 standards. These bolds feature high tensile strength and good wear resistance and are used in automotive applications and for bolting large and forged parts. 

Nominal Tensile Strength: 1.000 Megapascal (MPa) or 1.000 N/sqr. mm , Yield Stress: 900 Megapascal (MPa) or 900 N/sqr. mm 

They are offered in different finishes (zinc plated, plain or hot dip galvanised) and different standard, coarse and fine thread sizes (diameter M20 to M100 mm / 3/4" to 3.1/2").  Sold by the piece (pc.) in increments of 10 pieces with Minimum Order Quantity (MOQ) 100 pieces. Appearing price is for reference only and differentiates based on wanted bolt sizes. Please contact us for a quotation.

The NAS1630 Series screws are pan head, short thread, offset cruciform machine screws offered as part of our own branded (AVIATIONEU NEW ERA) product lines. These screws use PHILLIPS Screw-Torq-Set® drive system with significant benefits outlined below. Sourced from quality manufacturers they are offered in alloy steel or corrosion resistant steel (CRES) and different thread sizes and legths in inches. Sold in packs each containing a specified number of screws. The number of screws in each pack is specified after the letters "PK" in the product reference code (SKU).

PHILLIPS Screw-Torq-Set® Drive System Features & Benefits

Offset cruciform shape with straight wing walls for greater torque transfer.

Removal walls larger than drive walls. Facilitates disassembly without drill outs.

Specific driver for each diameter fastener. Assures optimum torque for each size and strong head configuration.

Compatible with standard PHILLIPS ACR® ribbed TORQ-SET® drivers. Allows use of ribbed tools with standard screws

PSC quality inspections. Assures global system quality and compatibility.

The NAS1581 Series screws  (also termed as bolts) are high strength, close tolerance, reduced (shear) head, countersunk screws offered as part of our own branded (AVIATIONEU NEW ERA) product lines. They come in different materials and finishes designated by the following letters in their product reference number (SKU) which is formed as a combination of the material, diameter, drive style, grip length and option of the screw:

Materials

(A) or (F) = Alloy Steel, 4140,4340 or 8740, Heat treated to 160-180ksi. Cad 2 plated. Material Code (A) has been superseded by Code (F)

(C) = Corrosion Resistant (A286) Steel, Heat treated to160-190ksi. Cad 2 (optional)

(V) = Titanium (6al-4v) Heat treated to 160-180ksi. No finish. Material Code (V) has been cancelled Dec.1991

Diameters: Numbers 3 to 10

Drive Styles

(R)= Offset Cruciform, (Torq-set) R, for diameters 3,4 & 5.

(T) = Offset Cruciform, (Torq-set) R for diameters 6 and up.

(H) = Dovetail Slot

Grip Lengths

The grip length  for Countersunk Head Fasteners (T in the supplied table) includes the head and extends to the full cylindrical portion of the shank. The Grip Length for NAS1581 Series screws is measured in 1/16ths of an inch. + or - .010

AVIATIONEU NEW ERA NAS1581 Series screws are offered in pieces or kits for convenience and economy. 

For more information, please refer to the supplied documentation or contact us.

National Aerospace Standard (NAS) machine bolts are commonly used in aircraft, space shuttles, military vehicles, drones, and other high-performance applications. They are offered in different series to meet application requirements.

Those of NAS 6203 through NAS 6220 series, superseding their NAS 11(xx) counterparts, are tension hexagon head high strength close tolerance short-thread alloy steel bolts with a minimum tensile strength of 160,000 psi and a minimum shear strength of 95,000 psi. 

They are made from different steel alloys such as 4140 (UNS G41400) or  4340 (UNS G43406) with either Cadmium Plate  Type II, Class 2 or Chromium Plate on shank only with all other surfaces cadmium plated.

Depending on the series they come in different nominal diameters in inches (e.g. NAS 6203 0.1875" (3/16"), NAS 6204 0.25" (1/4"), NAS 6205  0.3125" (5/16"), NAS 6206 0.375" (3/8"), NAS 6208 0.500" 1/2") or NAS 6210 0.625" (5/8") grips (in 1/16” increments beginning at 1/16”), thread and overall fastener lengths. They can be supplied undrilled or with drilled head and/or thread and with or without locking elements (nylon or equivalent). Sourced from quality manufacturers, these bolts are listed according to their series, and offered either as OEM parts or as parts of our own labelled (AVIATIONEU NEW ERA) product lines (see the respective listings). Sold in pieces or packs of specified number of bolts per pack designated by the number after the letters "PK" in the product reference code (SKU).

The following letters after the basic part numbers specify the material, finish, drilling condition, and self-locking capability of these bolts.

No Finish Code for Cadmium II plated bolts

"C" for Chromium plated bolts (shank only)

"L" for Self-locking bolts

"P" for Self-locking bolts with patch type locking element only

Grip Dash Number indicating grip in .0625 increments

"D" after the grip dash number for drilled thread bolts

"H" after the grip dash number for bolts with drilled head

More than one code letters may be used in sequence.

PN Examples:

NAS6204-10 - NAS 6204 Series Bolt, .2500-28 Thread, .625 Grip, Undrilled, Non-locking, Alloy Steel Cadmium II Plated.

NAS6204-10D - Same bolt as above with Drilled Thread.

For more information, please refer to the supplied documentation or contact us.

These bolts are for use in Textron Lycoming aircraft engines. Supplied with our own Certificate of Conformance. If additional certification is required, please contact us as a respective charge may apply.

Machine screws are one of the more widely used products among dozens of standard fastener types. They can be either coarse-threaded or fine-threaded, and are usually available with a wide range of head types. Usually stronger than many other screw types, they are used for fastening metal parts and panels securely together in a range of construction and other applications including aerospace, machinery, vehicles, engines, tool assemblies, electronic devices, and large-scale industrial equipment. 

Sourced from quality producers,  machine screws are offered as part of our own branded (AVIATIONEU NEW ERA) product lines conforming to aerospace/military or industrial standards/specifications.  They come in different sizes, head types, materials and thread gradings. Countersunk screws allow the head of the screw to sit flush with or below the surface of the surrounding material. They may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges.

AVIATIONEU NEW ERA MS35206 and MS35207 series of machine (non structural) screws are mil spec pan head cross recessed (Phillips) screws, manufactured from carbon steel and are cadmium plated to specification QQ-P-416, Type 2, Class 3. MS35206 series machine screws feature 60,000 psi min. tensile strength and can be used as replacements for AN526 truss head & AN515 round head screws. MS35207 series machine screws are fine threaded have a minimum tensile strength of 55,000 psi and replace the AN507R series. Both MS35206 and MS35207 series machine screws are offered in different diameters, thread sizes and lengths in inches and they are sold in pieces. For more information, please refer to the individual product presentations, the supplied documentation or contact us.

AVIATIONEU NEW ERA Screw Extraction Kit is intended for use as a removal tool of stuck or broken screws, bolts or studs.

The kit consists of a 6-piece standard screwdriver set and a T Type steel single sided ratchet wrench adjustable to handle fasteners of M3 to M8 sizes. 

It is a high quality, versatile, convenient, efficient and long service life kit that can be used for home and professional applications in bikes, cars, electronics, household appliances, mobile repairs and other uses.

The 6-piece standard screwdriver set and the ratchet wrench can be bought separately although the kit provides a cost effective solution.