232213-27 ASTM A307 Grade B 111422 NEW.pdf
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- Solicitation number
- 36C24226R0106
About this file
This document contains product specification sheets and technical data for heavy hex bolts and nuts manufactured by LEP Special Fasteners, Inc., along with a certification letter confirming domestic production and compliance with federal directives.
The letter dated October 30, 2008, from LEP Special Fasteners certifies that all components are manufactured domestically at their Frankfort, Indiana facility in compliance with DFARS directives. The company produces private label Grade 9 nuts as well as standard Grade 5 and Grade 8 cap screws, utilizing only domestic steel mills for raw materials prior to cold heading processes. The specification sheets detail heavy hex nuts per ASME B 18.2.2 & 18.2.6 standards, with dimensions and tolerances for nominal sizes ranging from 1/4" to 1" diameter. Four grade options are specified: Grade-C, A194 Grade-2, A 563 Grade-DH, and A 563 Grade-DH3, with corresponding material composition requirements, heat treatment specifications, core hardness ratings, and proof load values. The heavy hex bolts specifications cover ASTM A193 GR B7 and ASTM A307 GR A & B standards, with detailed dimensional tables including nominal sizes from 1/2" to 2", width across flats, width across corners, head height, and thread length parameters. Material composition, hardness, tensile strength, and elongation requirements are specified for each grade, with Grade B7 bolts rated for 125,000 psi minimum tensile strength suitable for high-temperature and high-pressure service applications. Length tolerances are provided for various screw sizes and nominal lengths.
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