2022_Monster_Bolts_Fasteners_eBay
Bulk item listing for 500 new 5/16-18 3" Hex Head Flange Bolts, also called Frame Bolts. Made from Grade 8 Steel with Black Phosphate coating.

Diameter :
 5/16"
Thread Size / Count : 18 TPI - Coarse Thread
Length : 
3"
Drive :
 1/2" Socket Wrench
Type :
 Hex Flange Bolt
Matching Nut & Washers:  5/16-18 - Available here
System of Measurement :
 Inch / US
Material :
 Grade 8 Steel w/ Black Phosphate
Specifications :
 ASME B18.2.1 (2010) and SAE J429