9/16"-18 x 4" Green Rinsed Zinc Grade 5 Hex Cap Screws (17 pcs.)

Diameter: 9/16"
Length: 4"
Material: Steel
Finish: Green Rinsed Zinc
Head Style: Hex (7/8" Wrench)
Thread Size: 18 (Fine)
Thread Length: 1-3/8"
Hardness: Grade 5
Type: Cap Screw

Box of 17.

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