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 menu above.
- Full Thread up to 1-1/4", partial thread beyond (PT)
- Wrench Size: 1/2"
- Type: Hex Cap Bolt / Screw
- Matching Nut & Washers: 5/16-18 Available here
- System of Measurement: U.S. / Inch
- Material: Grade 8 Alloy Steel - HEAVY DUTY!
- Specifications: ASTM B18.2.1