Item description for 1/4"-20 x 4" Zinc Plated Steel Coarse Full Thread Hex Head Tap Bolts (8 pcs.)

Diameter: 1/4"
Length: 4"
Material: Steel
Finish: Zinc
Head Style: Hex (7/16" Wrench)
Thread Size: 20 (Coarse)
Style: Full Thread
Type: Tap Bolt

Box of 8.

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