1.1 This specification covers chemical, dimensional, physical and mechanical requirements for quenched and tempered bolts manufactured from steel and alloy steel, in inch dimensions. The bolts are available as structural bolting assemblies which include a fixed spline bolt, a suitable nut and at least one washer covered by reference herein.
1.2 Intended Use:
1.2.1 Bolts manufactured under this specification, and structural bolting assemblies supplied under this specification, are intended for use in structural connections covered in the Specification for Structural Joints Using High-Strength Bolts and installed using the torque-and-angle or part turn/combined installation method.
1.2.2 Structural bolting assemblies in this specification are furnished in nominal diameters from 1/2 to 1-1/4 in. inclusive.
1.3 Classification:
1.3.1 Structural bolting assemblies are designated as Grade 144.
1.3.2 Bolts are designated by type denoting raw material chemical composition.
| Type 1 - | 144ksi - carbon steel, carbon boron steel, alloy steel or alloy steel with boron addition |
| Type 3 - | 144ksi - weathering steel |
1.4 Terms used in the specification are defined in Terminology F1789.
1.4.1 Torque-and-Angle Fixed-Spline Structural Bolt—bolt that includes an integral fixed-spline end which extends beyond the threaded portion of the bolt and is used as a component of a torque-and-angle fixed-spline structural bolting assembly.
1.4.2 Torque-and-Angle Fixed-Spline Structural Bolting Assembly2— a fastener assembly comprised of a torque-and-angle fixed-spline bolt with a suitable nut and at least one washer, installed and tightened using a special electric wrench and socket system which has an inner socket that enga......
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