What are Fasteners?

A fastener or fastening is a hardware device that mechanically joins or affixes two or more objects together. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components. Welding is an example of creating permanent joints. The most common types are the screw, nut and bolt, possibly involving washers. Other more specialized types of threaded fasteners include captive threaded fasteners, stud, threaded inserts, and threaded rods.

Types of Fasteners

Bolts

Nuts

Washers

Screws

 

Standard Specifications for Fasteners

Size	M5 to M1000
Length	3 mm to 200 mm
Types	Bolts, Nuts, Screws, Studs, Screw, Hex Set Screw, Socket Screw, Sockets, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Cap Screw, Hex Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Structural Bolts Hex Head Bolts, J Bolts, Socket Hexagon Head Screw, U- Bolts, Hex Coupling Nut, Mushroom Head Square Neck Bolts, Anchor Bolt, Wing Screw, Eye Bolt, Foundation Bolts, T-Head Bolts
Form	Hex Bolt, Square Bolt, Stud Bolt, Threaded Bar, Allen Bolt, Flat Screw, Grub Screw, Hex Nut, Square Nut, Plain Washer, Hardlock Nut.

Material of Construction in Fasteners

  Stainless Steel Fasteners Specifications

Grades : ASTM A182, ASME SA182 Gr F201, F202, F301, F302, F304, F304L, F309, F310, F316,
F316L, F316LN, F317L, F321, F347, 405, 409, 410, 420, 430, 440C, F904L, Al-6XN
(N08367), Nitronic 50 / 60, 422, 416, 446, Nimonic 80 (N07080), A286(S66286),
17-4ph, 15-5ph, Alloy 28 (N08028).

  Alloy Steel Fasteners Specifications

Grades : ASTM A182, ASME SA182 GR F11, F12, F22, F5, F9, F91.

  Carbon Steel Fasteners Specifications

Grades : ASTM A193 / A320 MS, Gr. B7, B8, B16, Gr. L7, 4.6, 8.8, 10.9

  Duplex & Super Duplex Steel Fasteners Specifications

Grades : ASTM A182, ASME SA182 GR 2205 (F51, S31803 / F60, S32205),
SMO254 (F44, S32154), 2507 (F53, S32750 / F55, S32760),
Ferralium 255 (F61, S32550)

  Nickel Alloy Fasteners Specifications

Grades : ASTM B564 / A182 GR 200 (N02200), 201 (N02201), Alloy 20 (F20, N08020)

  Monel Alloy Fasteners Specifications

Grades: ASTM B564, ASME SB564 GR 400 (N04400), 500 (N05500).

  Inconel Fasteners Specifications

Grades : ASTM B564 / A182 GR 600 (N06600), 601 (N06601), 625 (N06625),
718 (N07718), 800 (N08800), 800H (N08810), 800HT (N08811), 825 (N08825),
904L (N08904)

  Copper Alloy Fasteners Specifications

Grades : ASTM B 151 ASME SB 151 Commercial, ETP, OFE, CuNi 90/10 (C70600),
CuNi 70/30 (C71500), Brass, Naval Brass, Aluminium Bronze, Admiralty Brass,
Beryllium Copper.

  Hastelloy Fasteners Specifications

Grades : ASTM B564, ASME SB564 GR C726 (N10276), C4 (N06455), C22 (N06022),
C2000 (N06200), X (N06002), B2 (N10665), B3 (N10675).

  Titanium Fasteners Specifications

Grades : ASTM B381, ASME SB381 GR F2, F5 (Ti6AI4V), F7.

  Other Metal Fasteners Specifications

Grades : Tantalum, Molybdenum, Niobium, Zirconium, Tungsten, Magnesium