Full Description

1.1This specification² covers the chemical and mechanical requirements of two grades of carbon steel bolts and studs in sizes ¹/₄in. through 4 in. The fasteners are designated by Grade denoting tensile strength and intended use, as follows:

Grade	Description
Grade A	Bolts, studs, and threaded rod having a minimum tensile strength of 60 ksi and intended for general applications,
Grade B	Bolts, studs, and threaded rodA having a tensile strength of 60 to 100 ksi and intended for flanged joints in piping systems with cast iron flanges, and
Grade C	Replaced by Specification F1554Gr.36

^AThreaded rod is not usually produced to Grade B, but can be when specified by the purchaser.

1.2This specification does not cover requirements for machine screws, thread cutting/forming screws, mechanical expansion anchors or similar externally threaded fasteners.

1.3Suitable nuts are covered in Specification A563. Unless otherwise specified, the grade and style of nut for each grade of fastener, of all surface finishes, shall be as follows:

Fastener Grade and Size	Nut Grade and StyleA
A 1/4to 11/2in.	A, hex
A over 11/2to 4 in.	A, heavy hex
B, 1/4to 4 in.	A, heavy hex

^ANuts of other grades and styles having specified proof load stresses (Specification A563, Table 3) greater than the specified grade and style of nut are also suitable.

1.4The values stated in inch-pound units are to be regarded as the standard.

1.5Supplementary Requirement S1 of an optional nature is provided, which describes additional restrictions to be applied when bolts are to be welded. It shall apply only when specified in the inquiry, order, and contract.

1.6Terms used in this specification are defined in Terminology F1789 unless otherwise defined herein.

Product Details

Published: 12/01/2012 Number of Pages: 6 File Size: 1 file , 99 KB Redline File Size: 2 files , 150 KB