Description
5/16"-18 Hex Cap Bolts / screws. These are Heavy Duty Grade 8 Alloy Steel with black oxide.
Diameter: 5/16"
Thread Size: 18 - Coarse (Standard) Thread
Length: Please select from drop down menu above.
Full Thread up to 1-1/4", partial thread beyond (PT)
System of Measurement: U.S. / Inch
Material: Grade 8 Alloy Steel - HEAVY DUTY!
Specifications: ASTM B18.2.1