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Screws & Bolts

Screws and bolts are commonly used as threaded fastening devices on aircraft and other industrial applications. Screws differ from bolts as they are generally made of lower strength materials. They can be installed with a loose fitting thread, and the head shapes are made to engage a screwdriver or wrench. Some screws have a clearly defined grip or unthreaded portion while others are threaded along their entire length. Several types of structural screws differ from the standard structural bolts only in head style. The material in them is the same, and a definite grip length is provided. The screws commonly used on aircraft  are classified in three groups: (1) Structural screws, made of alloy steel, which have the same strength as equal size bolts; (2) machine screws, usually of flathead (countersunk), roundhead, or washer head types. These screws are general purpose screws for general repair and are available in low carbon steel, brass, corrosion resistant steel, and aluminum alloy; and (3) selftapping screws, which are used for attaching lighter parts. A fourth group, drive screws, are not actually screws but nails. They are driven into metal parts with a mallet or hammer and their heads are not slotted or recessed.

Screws and bolts are sourced by quality suppliers, produced in accordance with military and other international standards and offered in different materials, types, sizes and packaging options as parts of aicraft or engine manufacturers, the respective product lines of respective producers or under our own AVIATIONEU NEW ERA brand. 

You can find our extensive collection of Aerospace/Military and Industrial (Commercial) screws and bolts structured in different series based on the standard they conform(*). Our Industrial (Commercial) screws and bolts come in different standards/ specifications, such as those of the American Society for Testing and Materials (ASTM) and DIN, in different packing options and they are intended for use in a wide range of applications in many industries.

For additional information please refer to the article on an overview of our fasteners, other supplied documentation, the individual product presentations or contact us.

(*) Common Aerospace/Military Fastener Standards

Army-Navy Standards (AN)

Predecessor to Mil-Spec (MS), AN fasteners are the industry standard for aircraft, indicating that these fasteners are made to military specifications to stand up to the toughest jobs without faltering.

Military Standards  (Mil-Spec, MS)

A United States Defense Standard is used to help achieve standardization objectives by the U.S. Department of Defense. Also used by other non-Defense government organizations, technical organizations, and industry. 

National Aerospace Standards (NAS & NA)

“NAS” stands for National Aerospace Standard. The NA prefix is for Metric standards. NAS standards include Part Standards for high strength, precision fasteners.

Aerospace Industries Association Standards (NASM and NAM)

Aerospace Industries Association (AIA), in coordination with the US Department of Defense, has converted a number of MIL-spec's to NAS. These now carry a “NASM” (for inch based) or “NAM” (for Metric based) prefix. The standard continues to be procured to the MS part number.

Screws & Bolts

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AVIATIONEU NEW ERA AN/NASM...

AN hex head bolts in different series are offered under AVIATIONEU NEW ERA product series. Sourced from quality vendors, these bolts are manufactured to the US Army-Navy (AN) standard, predecessor to Mil-Spec (MS), superseded by the National Aerospace Standard (NAS). Commonly used in aviation for either tensile/shear load applications. Made from high-strength type 4037 or 8740 alloy steel or 431 Stainless Steel (CRES) and cadmium plated for superior corrosion resistance (compared to commercial grade zinc plated bolts) they are offered with shank drilled for cotter pin or undrilled for stop nut application, and with a drilled head for safety wire or without. Minimum Tensile Strength (Steel and CRES) - 125,000psi. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. Threads are pressed into the steel, not cut, thus maintaining strength throughout the entire shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue. The following letters are used in the product part  numbers.

"A" after the dash number for bolts with undrilled shank

"C"  for bolts made of 431 Stainless Steel (CRES)

"H" after the AN number for bolts with drilled head (eg. AN3H-15)

 AN3 through AN20 Series bolts are superseded by NASM3 through 20 Series. The part numbers in both series have not been changed. 

Specification Details:

AN3 through AN20 (REV. 12), Military Specification Sheet: Bolt -Machine, Aircraft [superseded by NASM3 through 20]. This specification covers aircraft machine bolts part numbers, AN3, AN4, AN5, AN6, AN7, AN8, AN9, AN10, AN14, AN16, AN17, AN18, and AN20. AN3 THRU AN20  is canceled and superseded by NASM3 THRU NASM20. The Part Identification Number (PIN) for AN3 THRU AN20 REV. 12 and the part number for NASM3 THRU NASM20 are identical. The part numbers have not been changed.

TEXTRON LYCOMING Engine...

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.

AVIATIONEU NEW ERA AN/NASM...

AN hex head bolts in different series are offered under AVIATIONEU NEW ERA product series. Sourced from quality vendors, these bolts are manufactured to the US Army-Navy (AN) standard, predecessor to Mil-Spec (MS), superseded by the National Aerospace Standard (NAS). Commonly used in aviation for either tensile/shear load applications. Made from high-strength type 4037 or 8740 alloy steel or 431 Stainless Steel (CRES) and cadmium plated for superior corrosion resistance (compared to commercial grade zinc plated bolts) they are offered with shank drilled for cotter pin or undrilled for stop nut application, and with a drilled head for safety wire or without. Minimum Tensile Strength (Steel and CRES) - 125,000psi. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. Threads are pressed into the steel, not cut, thus maintaining strength throughout the entire shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue. The following letters are used in the product part  numbers.

"A" after the dash number for bolts with undrilled shank

"C"  for bolts made of 431 Stainless Steel (CRES)

"H" after the AN number for bolts with drilled head (eg. AN4H-15)

 AN3 through AN20 Series bolts are superseded by NASM3 through 20 Series. The part numbers in both series have not been changed. 

Specification Details:

AN3 through AN20 (REV. 12), Military Specification Sheet: Bolt -Machine, Aircraft [superseded by NASM3 through 20]. This specification covers aircraft machine bolts part numbers, AN3, AN4, AN5, AN6, AN7, AN8, AN9, AN10, AN14, AN16, AN17, AN18, and AN20. AN3 THRU AN20  is canceled and superseded by NASM3 THRU NASM20. The Part Identification Number (PIN) for AN3 THRU AN20 REV. 12 and the part number for NASM3 THRU NASM20 are identical. The part numbers have not been changed.

AVIATIONEU NEW ERA AN/NASM...

AN hex head bolts in different series are offered under AVIATIONEU NEW ERA product series. Sourced from quality vendors, these bolts are manufactured to the US Army-Navy (AN) standard, predecessor to Mil-Spec (MS), superseded by the National Aerospace Standard (NAS). Commonly used in aviation for either tensile/shear load applications. Made from high-strength type 4037 or 8740 alloy steel or 431 Stainless Steel (CRES) and cadmium plated for superior corrosion resistance (compared to commercial grade zinc plated bolts) they are offered with shank drilled for cotter pin or undrilled for stop nut application, and with a drilled head for safety wire or without. Minimum Tensile Strength (Steel and CRES) - 125,000psi. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. Threads are pressed into the steel, not cut, thus maintaining strength throughout the entire shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue. The following letters are used in the product part  numbers.

"A" after the dash number for bolts with undrilled shank

"C"  for bolts made of 431 Stainless Steel (CRES)

"H" after the AN number for bolts with drilled head (eg. AN5H-15)

 AN3 through AN20 Series bolts are superseded by NASM3 through 20 Series. The part numbers in both series have not been changed. 

Specification Details:

AN3 through AN20 (REV. 12), Military Specification Sheet: Bolt -Machine, Aircraft [superseded by NASM3 through 20]. This specification covers aircraft machine bolts part numbers, AN3, AN4, AN5, AN6, AN7, AN8, AN9, AN10, AN14, AN16, AN17, AN18, and AN20. AN3 THRU AN20  is canceled and superseded by NASM3 THRU NASM20. The Part Identification Number (PIN) for AN3 THRU AN20 REV. 12 and the part number for NASM3 THRU NASM20 are identical. The part numbers have not been changed.

AVIATIONEU NEW ERA AN/NASM...

AN hex head bolts in different series are offered under AVIATIONEU NEW ERA product series. Sourced from quality vendors, these bolts are manufactured to the US Army-Navy (AN) standard, predecessor to Mil-Spec (MS), superseded by the National Aerospace Standard (NAS). Commonly used in aviation for either tensile/shear load applications. Made from high-strength type 4037 or 8740 alloy steel or 431 Stainless Steel (CRES) and cadmium plated for superior corrosion resistance (compared to commercial grade zinc plated bolts) they are offered with shank drilled for cotter pin or undrilled for stop nut application, and with a drilled head for safety wire or without. Minimum Tensile Strength (Steel and CRES) - 125,000psi. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. Threads are pressed into the steel, not cut, thus maintaining strength throughout the entire shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue. The following letters are used in the product part  numbers.

"A" after the dash number for bolts with undrilled shank

"C"  for bolts made of 431 Stainless Steel (CRES)

"H" after the AN number for bolts with drilled head (eg. AN6H-15)

 AN3 through AN20 Series bolts are superseded by NASM3 through 20 Series. The part numbers in both series have not been changed. 

Specification Details:

AN3 through AN20 (REV. 12), Military Specification Sheet: Bolt -Machine, Aircraft [superseded by NASM3 through 20]. This specification covers aircraft machine bolts part numbers, AN3, AN4, AN5, AN6, AN7, AN8, AN9, AN10, AN14, AN16, AN17, AN18, and AN20. AN3 THRU AN20  is canceled and superseded by NASM3 THRU NASM20. The Part Identification Number (PIN) for AN3 THRU AN20 REV. 12 and the part number for NASM3 THRU NASM20 are identical. The part numbers have not been changed.

AVIATIONEU NEW ERA AN/NASM...

AN hex head bolts in different series are offered under AVIATIONEU NEW ERA product series. Sourced from quality vendors, these bolts are manufactured to the US Army-Navy (AN) standard, predecessor to Mil-Spec (MS), superseded by the National Aerospace Standard (NAS). Commonly used in aviation for either tensile/shear load applications. Made from high-strength type 4037 or 8740 alloy steel or 431 Stainless Steel (CRES) and cadmium plated for superior corrosion resistance (compared to commercial grade zinc plated bolts) they are offered with shank drilled for cotter pin or undrilled for stop nut application, and with a drilled head for safety wire or without. Minimum Tensile Strength (Steel and CRES) - 125,000psi. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. Threads are pressed into the steel, not cut, thus maintaining strength throughout the entire shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue. The following letters are used in the product part  numbers.

"A" after the dash number for bolts with undrilled shank

"C"  for bolts made of 431 Stainless Steel (CRES)

"H" after the AN number for bolts with drilled head (eg. AN8H-15)

 AN3 through AN20 Series bolts are superseded by NASM3 through 20 Series. The part numbers in both series have not been changed. 

Specification Details:

AN3 through AN20 (REV. 12), Military Specification Sheet: Bolt -Machine, Aircraft [superseded by NASM3 through 20]. This specification covers aircraft machine bolts part numbers, AN3, AN4, AN5, AN6, AN7, AN8, AN9, AN10, AN14, AN16, AN17, AN18, and AN20. AN3 THRU AN20  is canceled and superseded by NASM3 THRU NASM20. The Part Identification Number (PIN) for AN3 THRU AN20 REV. 12 and the part number for NASM3 THRU NASM20 are identical. The part numbers have not been changed.

AVIATIONEU NEW ERA AN/NASM...

AN hex head bolts in different series are offered under AVIATIONEU NEW ERA product series. Sourced from quality vendors, these bolts are manufactured to the US Army-Navy (AN) standard, predecessor to Mil-Spec (MS), superseded by the National Aerospace Standard (NAS). Commonly used in aviation for either tensile/shear load applications. Made from high-strength type 4037 or 8740 alloy steel or 431 Stainless Steel (CRES) and cadmium plated for superior corrosion resistance (compared to commercial grade zinc plated bolts) they are offered with shank drilled for cotter pin or undrilled for stop nut application, and with a drilled head for safety wire or without. Minimum Tensile Strength (Steel and CRES) - 125,000psi. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. Threads are pressed into the steel, not cut, thus maintaining strength throughout the entire shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue.  AN3 through AN20 Series bolts are superseded by NASM3 through 20 Series. The part numbers in both series have not been changed. The following letters are used in the product part  numbers.

"A" after the dash number for bolts with undrilled shank

"C"  for bolts made of 431 Stainless Steel (CRES)

"H" after the AN number for bolts with drilled head (eg. AN10H-15)

AN10 bolts have a 5/8-18 thread with a 5/8" shank diameter. All AN10 bolts have a 0.955 thread length regardless of grip length. They can be torqued  to 92-108 lb-ft with AN365 or AN310 full-height nuts, or 50-65 lb-ft with AN364 or MS21042 half-height nuts. Indicated lengths are UHL: Under Head Length (aka Full Shank Length or Overall Length not including bolt head).

AVIATIONEU NEW ERA DIN933...

AVIATIONEU NEW ERA Hexagon Bolts are made of Stainless Steel 304/316 (depending on the P/N) with a bright surface treatment and a strength class of A2-70 for SS 304 bolts and A4-70 for SS 316 bolts. They are fully threaded, coarse type, and produced by certified manufacturers in accordance with DIN 933 standard. They are offered in competitive prices in different diameters ("M" designated), indicating the bolt's diameter in mm and lengths in mm. The thread pitch (the distance between threads measured along the length of the bolt) expressed in mm is indicated by the "P" designation in the P/N. Sold in packs of 250, 100 or  25 pieces depending on the selected product. The number of pieces included in each pack is mentioned after "PK" designation.

AVIATIONEU NEW ERA ASTM...

AVIATIONEU NEW ERA high tensile stainless steel threaded bolts are manufactured from AISI 410 stainless steel and heat-treated and machined to minimum of 110-ksi or 760 Mpa tensile strength. They are dual ASTM & ASME certified (ASTM A193 B6: Class 1 Stainless Steel, ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads). In addition to their high tensile strength, they exhibit excellent resistance to corrosion, good dimensional stability, durability as well as a long functional work life. They can be used in different industries demanding high tensile strength and corrosion resistance like marine, chemical & petrochemical etc. Sold in in packs (pk) of 25 bolts/pk in different head, body diameters and thread lengths in inches with Minimum Order Quantity (MOQ) 10 packs. Please refer to the attached specifications table. Appearing price is for reference only and differentiates based on wanted bolt sizes. Please contact us for a quotation.

AVIATIONEU NEW ERA ASTM...

AVIATIONEU NEW ERA ASTM A193 Grade B6 Series stainless steel stud bolts are manufactured from the ferritic grade AISI 410 stainless steel and can be heat-treated and machined to minimum of 110-ksi or 760 Mpa tensile strength. Like other fasteners in this seies, apart from their high tensile strength, they exhibit excellent resistance to corrosion, durability as well as a long functional work life. They can be used in different applications in industries that demand high tensile strength and corrosion resistance. Sourced by certified manufacturers they are competively priced and offered in different diameters and lengths. 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.

AVIATIONEU NEW ERA ASTM...

AVIATIONEU NEW ERA ASTM A324 Grade 8.8 Series high tensile hexagonal head threaded bolts are produced from medium carbon steel with heat treatment by both quenching and tempering.  They comply with ASTM A324, ASME SA324 standards. Medium carbon steel is less expensive  than other grades and features good ductile and malleable qualities but a lower tensile strength. 

Grade 8 Class bolt capabilities: Yield (strech): 4354 lbs min, Tension (failure): 5024 lbs min, Tensile Strength: 150.000 lbs per square inch.

These bolts are offered in different finishes (zinc plated, plain or hot dip galvanised) and different 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.

AVIATIONEU NEW ERA ASTM...

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.

AN 23 Series Clevis Bolt...

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).

AN 22 Series Clevis Bolt...

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 21 Series Clevis Bolt...

AN 21 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).