The (ASTM) American Society for Testing and Materials has developed different standard & speficiation for Bolt fasteners for variety of uses.
ASTM’s fastener standards are instrumental in specifying, testing, and evaluating the material, dimensional, mechanical, and metallurgical properties of the various forms of hardware fasteners. These fasteners are used to mechanically join or affix other hardware objects together, and come in many forms which include rivets, nuts, bolts, studs, screws, washers, eyebolts, nails, and threaded fasteners. These fastener standards allow hardware product manufacturers, as well as the end-users of such products, to examine and assess fasteners to ensure their strength and quality towards safe utilization.
ASTM A194 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure and High Temperature Service. This specification covers a variety of carbon and alloy steel nuts. These steel nuts are used with A 325 Bolts. Hughes Brothers uses Grade 2H.
ASTM A307 Standard Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength This specification covers the chemical and mechanical requirements of two grades of carbon steel bolts and studs in sizes 1/4 inch through 4 inch. Grade A bolts are used for general applications.
ASTM A325 Standard Specification for High-Strength Bolts for Structural Steel Joints This specification covers the chemical and mechanical requirements of various types of quenched and tempered steel bolts commonly known as “high strength structural bolts,” intended for use in structural joints. Type 1, Bolts made of medium carbon steel. Type 3, Bolts having atmospheric corrosion resistance.
ASTM A394 Standard Specification for Zinc Coated Steel Transmission Tower Bolts This specification covers the chemical and mechanical requirements of hexagon and square head zinc coated steel bolts and atmospheric corrosion resistant bolts in nominal thread diameters of 1/2, 5/8, 3/4, 7/8 and 1 inch for use in the construction of transmission towers, substations, and similar steel structures. Type 0: Zinc coated bolts made of low or medium carbon steel. Type 3: Bolts having atmospheric corrosion resistance and weathering characteristics comparable to that of steel covered in Specifications A242, A588 and A709.
ASTM A563 Standard Specification for Carbon and Alloy Steel Nuts This specification covers chemical and mechanical requirements for eight grades of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. Grade A nuts are used for general applications.
ASTM A36 Standard Specification for Structural Steel Interchangeable with SAE C1018 Low Carbon, general purpose, special quality machinery steel. This specification covers carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes.
ASTM A242, A588, and A709 Standard Specifications for High Strength Low Alloy Structural Steels with enhanced atmospheric corrosion resistance.
ASTM A536 Ductile Iron Castings This specification covers castings made of ductile iron, also known as spheroidal or nodular iron is used for eye nuts and washer nuts, Grade 65-45-12.
ASTM A320 Alloy Steel Bolting Material for Low-Temperature Service. This specification covers alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for low-temperature service. The term “bolting material” as used in this specification covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts. The material may be further processed by centreless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed.