5/16-18 X 3-1/2" HEX HEAD CAP SCREW GRADE 5 (ZINC)

5/16"-18 x 3-1/2" HH Cap Screw

Grade 5 hex cap screws are manufactured from quenched and tempered medium carbon steel. They should be used when greater tensile strength needed. Yield-to-tensile ratio is the lowest of all heat treated steels. Varieties are available in coarse and fine thread with clear zinc finish (class 2A threads). They conform to ASTM A-354 and SAE J-429 Grade 5. Available in diameters from 1/4" to 1" and lengths up to 14". Head markings for grade 5 bolts is most commonly an arrangement of 3 lines.