An bolts meaning.
Bolts with no markings are low strength.
An bolts meaning. Feb 1, 1995 · A means the shank of the bolt is undrilled (no letter here means a drilled shank) So, this particular bolt is a 1/4 inch diameter AN bolt that is 1/2 inch long measured from just under the head to the tip of the shank. AN, NAS, and MS series aerospace hardware selection guide and information. com From their brochure: The NAS series is best known for its state-of-the-art, high strength, precision fasteners. In certain cases, aircraft manufacturers make bolts of different dimensions or greater strength than the This definition allows ambiguity in the description of a fastener depending on the application it is actually used for, and the terms screw and bolt are widely used by different people or in different countries to apply to the same or varying fastener. In this article, we’ll introduce the bolt grades system, the meaning of the bolt head AN Bolt Selector Hex head aircraft bolts are made of high-strength type 4037 or 8740 alloy steel (type 8740 is most commonly used). In bolts the number refers to the diameter of the bolt whereas in a fitting it refers to the OD of the tube and thereby have different threads. Mar 26, 2015 · Identifying AN Bolts: Sizes and Nomenclature Ordering AN Bolts can be confusing because they are so different from SAE bolts. Minimum tensile strength 125,000 PSI. They are manufactured from zinc-plated or cadmium corrosion-resistant steel, anodized aluminum alloys, and unplated corrosion-resistant steel. AN hardware is the industry standard for aircraft bolts. Mar 28, 2022 · The strength grade of the bolt is divided according to the hardness, force, and yield of bolt raw materials. Close-tolerance NAS bolts are marked with either a raised or recessed triangle. In addition to all types of screws, nuts, and rivets, NAS standards define high pressure hose, electrical connectors, splices and terminations, rod end bearings, and many other types of hardware and components. Oct 9, 2024 · Aeronautical Standard (AN) Hardware The Aeronautical Standard (AN) was created in the 1930s to standardize aircraft and military hardware, ensuring quality and reliability in addition to interchangeability across different manufacturers and military branches. For fastening bolts used in different products and applications, bolts of different grades are required to suit the uses. Bolt strength can be divided into ordinary grade and high strength grade. AN means Army-Navy, the old designation for USA Military Specifications (MilSpec). The bolts are centerless ground and threaded after heat treatment. AN bolts are called out by grip length, and they have shorter threads. Apr 3, 2023 · AN bolts are industrial aircraft bolts that are made in accordance with the Air Force-Navy specifications. Most bolts used in aircraft structures are either general purpose, AN bolts, NAS internal wrenching or close tolerance bolts, or MS bolts. Also, bolt length may vary by +1/32" to -1/64". Cad. In British terminology, a cap screw is a bolt that has threads all the way to the head. See full list on monroeaerospace. SAE bolts are identified by overall shank length, and they generally have much longer threads. Grip refers to the unthreaded portion of the shank. The bolt also has an undrilled shank which means it cannot accept a cotter pin. For example, AN6 bolt has a 3⁄8 -24 thread [3] whereas an -6 AN fitting has a 9⁄16 -18 thread. Although AN standards have mostly been superseded by NAS or MS standards below, some older AN hardware is still found within legacy Aircraft bolts are fabricated from cadmium- or zinc-plated corrosion-resistant steel, un-plated corrosion-resistant steel, or anodized-aluminum alloys. The mate-rial markings for NAS bolts are the same as for AN bolts, except they may be either raised or recessed. Bolts with no markings are low strength. xghqtfpahnlolfuzojnifqznhilqxcpggwxtcpkdllahdvlhliwqilszgno