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Rockwell C38-C42Grade 9 SteelCoarse Thread / Partially Threaded 1 inches of ThreadManufactured from 8647 /8640 /8740 Medium Carbon Alloy SteelTensile Strength: 180,000 psi. min,
3/8-16 x 6 Hex Cap Screw Grade 9 Zinc Yellow Plated Steel, 300 pcs T597
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$28.95
Regular price $120.14
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Has Greater tensile strength than a Grade 8. Designed for use in heavy machinery and equipment subject to harsh fatigue conditions