3/8"-24 x 2-1/4" Chrome Grade 5 Hex Cap Screws CSHS5-324 (10 pcs.)

Diameter: 3/8"
Length: 2-1/4"
Material: Steel
Finish: Chrome
Head Style: Hex (9/16" Wrench)
Thread Size: 24 (Fine)
Thread Length: 1" to 2"
Hardness: Grade 5
Type: Cap Screw

Box of 10.

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