5/16"-18 x 4" Zinc Plated Steel Coarse Full Thread Hex Head Tap Bolts (8 pcs.)

Diameter: 5/16"
Length: 4"
Material: Steel
Finish: Zinc
Head Style: Hex (1/2" Wrench)
Thread Size: 18 (Coarse)
Style: Full Thread
Type: Tap Bolt

Box of 8.

A tap bolt is a bolt threaded all the way to the head.