This specification covers two types of quenched and tempered alloy steel, metric heavy hex structural bolts having a tensile strength of 1040 to 1210 MPa.

The bolts are furnished in nominal bolt diameters M12 to M36, inclusive. They are designated by type denoting chemical composition as follows:

Type 1 Medium carbon alloy steel 

Type 2 Withdrawn in 2002 

Type 3 Weathering steel

This specification covers two types of quenched and tempered, alloy steel, heavy hex structural bolts having a tensile strength of 150 to 173 ksi.
The bolts are furnished in sizes 1/2 to 1 ? in., inclusive. They are designated by type denoting chemical composition as follows:

Type 1 Medium carbon alloy steel 

Type 2 Withdrawn in 2002 

Type 3 Weathering steel

This specification covers weldless forged, quenched, and tempered carbon steel threaded lifting eyes (formerly eyebolts) for overhead lifting.

The specification includes two types denoting shank pattern and one style denoting shank length (both defined in ASME B 18.15) as follows:

Type 1?Plain pattern (straight shank).

Type 2?Shoulder pattern.

Style B?Short length.

This specification covers the chemical and mechanical requirements for two types of quenched and tempered steel bolts and studs for general applications where high strength is required.

 The two types of bolts covered in this specification are:

Type 1 ? Medium-carbon steel bolts and studs furnished in nominal diameters of 1/4 to 3 in., inclusive.

Type 2 ? Low-carbon martensite or medium-carbon martensite steel bolts and studs furnished in nominal diameters of 1/4to 1 in., inclusive.

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 in. for use in the construction of transmission towers, substations, and similar steel structures. The various types of bolts covered in this specification are:

Type 0 ? Zinc-coated bolts made of low or medium carbon steel.

Type 1 ? Zinc-coated bolts made of medium carbon steel, quenched and tempered.

Type 2 ? Zinc-coated bolts made from what is generally described as low-carbon martensite steel, quenched and tempered.

Type 3 ? Bare (uncoated), quenched and tempered bolts made of steel having atmospheric corrosion-resistance and weathering characteristics comparable to that of the steel covered in Specifications A 242/A 242M, A 588/A 588M, and A 709/A 709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition (see 5.4). When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.

This specification covers two types of quenched and tempered, steel, metric heavy hex structural bolts having a minimum tensile strength of 830 MPa.

The bolts are furnished in sizes M12 to M136 inclusive. They are designated by type denoting chemical composition as follows:

1.3.1 Type 1?Medium-carbon, carbon boron, medium carbon alloy, or alloy boron steel.

1.3.2 Type 2?Withdrawn in 2003.

1.3.3 Type 3?Weathering Steel.

1.4 This specification is applicable to metric heavy hex, structural bolts only.

This specification covers the chemical and mechanical requirements of three grades of carbon steel bolts and studs in sizes 1/4 in. (6.35 mm) through 4 in. (104 mm). The fasteners are designated by "Grade" denoting tensile strength and intended use, as follows:

Grade Description 

Grade A Bolts and studs having a minimum tensile strength of 60 ksi (414 MPa) and intended for general applications, 

Grade B Bolts and studs having a tensile strength of 60 to 100 ksi (414 to 690 MPa) and intended for flanged joints in piping systems with cast iron flanges, and  

Grade C Nonheaded anchor bolts, either bent or straight, having properties conforming to Specification A 36/A 36M (tensile strength of 58 to 80 ksi (400 to 550 MPa)) and intended for structural anchorage purposes.