5/16"-18 x 1" Zinc Grade 8 Hex Washer Head Flange Bolts FBHWS8-042 (6 pcs.)

Diameter: 5/16"
Length: 1"
Material: Steel
Finish: Yellow Zinc
Head Style: Hex Washer (1/2" Wrench)
Thread Size: 18 (Coarse)
Thread Length: Full
Hardness: Grade 8
Type: Flange Bolt

Box of 6.

A flange bolt has a wide flange beneath the hex head of the bolt. Applied with a wrench.