5/16"-24 x 4" 18-8 Stainless Hex Cap Screws (6 pcs.)

Diameter: 5/16"
Length: 4"
Material: Stainless Steel
Head Style: Hex (1/2" Wrench)
Thread Size: 24 (Fine)
Thread Length: 7/8"
Hardness: 18-8
Type: Cap Screw

Box of 6.

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