Our grade 5 alloy hex cap screws are
manufactured in Los Angelis from oil quenched and tempered heat treated medium
carbon steel (1045). Available in coarse and fine thread, with zinc or black
oil finish (class 2A threads). They conform to ASTM A-354 and SAE J-429 Grade
5. Available in diameters from 1/4" to 2 1/2" and lengths up to
20". Head markings for grade 5 bolts is most commonly 3 lines in some
arrangement.
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