5/8"-11 x 4-1/2" 18-8 Stainless Hex Cap Screws CSHSS-381 (10 pcs.)

Diameter: 5/8"
Length: 4-1/2"
Material: Stainless Steel
Head Style: Hex (15/16" Wrench)
Thread Size: 11 (Coarse)
Thread Length: 1-1/2"
Hardness: 18-8
Type: Cap Screw

Box of 10.

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