HOWMET® AEROSPACE Inc. (formerly ARCONIC Inc.) develops & manufactures high performance, engineered products & solutions for the aerospace, industrial gas turbine, commercial transportation and oil and gas markets. ALCOA FASTENING SYSTEMS (ALCOA), now a business unit of  HOWMET® AEROSPACE is one of the largest manufacturers of aerospace hardware in the world.

SIMMONDS®, a HOWMET® AEROSPACE business unit, specialises on self-locking & special nuts. Their self locking nuts come in different types (series) offered in different materials and sizes, and can be reused at least 15 times without affecting the nut's performance. They are lightweight and extremely durable, exhibit a very strong locking performance & can be used in a wide temperature range.

SIMMONDS® Nylstop® Type P (Standard Version) & Type T (Low Profile Version) nylon locking nuts have been designed to stop nut and bolt disengagement during use. The internal nylon ring deforms around the threads as the nut is twisted on to the bolt, ensuring a tight, vibration resistant grip on the bolt.

SIMMONDS® PH Series Aerospace quality hexagonal self-locking nuts are small, thin walled, lightweight and extremely strong. Made from  A286 stainless steel (CRES) and silver plated these nutls are particularly useful when space and weight are at a premium. Used typically in engine applications, they are MJ threaded in Meric sizes M3-M12 to meet different applications requirements. 

SIMMONDS® SIMLOC® PH135M-ISO-MJ Series Hexagon Self-Locking Nuts are made of Alloy Steel 30CD4 or 35CD4 in accordance with TR 3791, heat treated for 40-43 HRC. They are Cadmium plated 5 µm mini in accordance with EN 2133 + Dry Film Lubricant in accordance with EN 2491. These lock nuts have an operating temperature up to 235°C and a 1100 MPa at ambient temperature. They are MJ threaded in accordance with ISO 5855-2 and comply with ISO 5858 standard qualification and acceptance conditions. They consist alternative parts for DIN LN 9338:2002-03 Aerospace Standard for hexagon self-locking washer nuts by various manufacturers. Offered nuts may be either parts of HOWMET SIMLOC® PH135M-ISO-MJ Series or parts conforming to DIN LN 9338:2002-03.

HM41/HM42 Series Flanged Self-Locking Nuts offered as part of HOWMET® AEROSPACE product portfolio. Made from A286 CRES per AMS 5732 or AMS 5735 specifications, they have Metric threads (M3 to M12) and are intended for use in temperatures up to 235 °C (HM42) or 425 °C (HM41). Tensile Stength 1100 Mpa. They are alternatives for DIN LN 9161 Standard nuts.

SIMMONDS® MHT Series are conical shaped self locking nuts, where the diameter of the upper part of the nut is slightly reduced. Six vertical slots open gradually whilst the nut is screwed onto the bolt. The elasticity of the particular shape of the nut will ensure the required locking torque.

For additional information on SIMMONDS® self locking nuts please refer to the Product Description section & the supplied documentation.

Anchor nuts (aka nutplates or anchor plates) are terms used interchangeably and relate to stamped sheet metal fasteners with an internally threaded tube and a plate with two clearance holes for rivets. They are used in blind mounted panel applications in aerospace and other industrial sectors where hex nuts cannot be used or an attached nut is required for ease of maintenance. 

Anchor nuts can be Fixed or Floating, the latter being easier to use due to their built-in nut (threaded hole) able to "float" slightly thus providing a convenient connection point for threaded rods, such as bolts, from the backside. In the case of Fixed anchor nuts, the built-in nut is static (i.e. without the capability to “float”) and the threaded rod must be positioned perfectly over the hole. Self-locking anchor nuts are those with a built-in locking mechanism preventing them from loosening over time from vibrations. They are extensively used in aerospace, automotive, and construction industries.

HOWMET® AEROSPACE Inc. ((HOWMET FASTENING SYSTEMS), formerly ARCONIC Inc., develops & manufactures high performance, engineered products & solutions for the aerospace, industrial gas turbine, commercial transportation and oil and gas markets. ALCOA FASTENING SYSTEMS (ALCOA), now a business unit of  HOWMET® AEROSPACE is one of the largest manufacturers of aerospace hardware in the world. SIMMONDS®, a HOWMET AEROSPACE® business unit, specialises on self-locking & special nuts. Their self locking nuts come in different types (series) offered in different materials and sizes, and can be reused at least 15 times without affecting the nut's performance. Born for the world of aviation, SIMMONDS® self-locking nuts are lightweight and extremely durable, exhibit a very strong locking performance, resistance to heat and corrosion & can be used in a wide temperature range in demanding aerospace, rally & other applications.

HOWMET AEROSPACE® manufactures and offers through their different business units a wide range of anchor nuts, fixed or floating, in various types (styles), such as one or two-lug, corner or others, different materials, finishes, and sizes. They are intended for use in different aerospace and industrial applications. Some of HOWMET AEROSPACE® nutplates are listed and many more (not currently listed) can be offered through our network of co-operating suppliers. Sold in pieces or in packs where the number of anchor nuts per pack is indicated after the letters "PK" in the product SKU.

For more information on HOWMET® AEROSPACE  nutplates please consult the Product Description section or contact us.