5/16"-24 x 3-1/2" Green Rinsed Zinc Grade 5 Hex Cap Screws (61 pcs.)

Diameter: 5/16"
Length: 3-1/2"
Material: Steel
Finish: Green Rinsed Zinc
Head Style: Hex (1/2" Wrench)
Thread Size: 24 (Fine)
Thread Length: 7/8"
Hardness: Grade 5
Type: Cap Screw

Box of 61.

A hex cap screw has a hexagonal head, designed to be driven by a wrench.