New 5/16"-18 Hex Cap Bolts / Screws. These are Grade 8 bolts and meet the SAE material quality standards and are marked as shown.

NOTE : Full Thread (FT) up to 1-1/4", Partial thread (PT) for lengths 1-3/8" and up.

Diameter : 5/16"

Thread Pitch : 18 TPI - Coarse (Standard) Thread

Length : Please select from drop down menu above.

Wrench Size : 1/2"

Type : Hex Cap Screws

Matching Nut & Washers : 5/16"-18 Available here

System of Measurement : Standard (Inch / U.S.)

Material : Grade 8 Alloy Steel - HEAVY DUTY!

Specifications : ASTM F593 / SAE J429