Value Collection MP39031 Hex Cap Screw 5/16-18 Grade 8 50 Pack

Product Description

The VALUE COLLECTION MP39031 is a Grade 8 steel hex head cap screw in a 5/16-18 UNC thread profile with a 1-1/2 inch length under the head. It features a zinc yellow dichromate finish that provides corrosion resistance in demanding environments. The screw is partially threaded, conforming to ASME B18.2.1 dimensional standards. This fastener is appropriate for structural and mechanical assemblies where high tensile strength and reliable clamping force are required. Sold in a package of 50, it suits shops, contractors, and field technicians who work through hardware in volume on fabrication, equipment repair, or general mechanical assembly tasks.

This fastener is suited for use in industrial, commercial, and trade applications where inch-series UNC fasteners are specified. Typical install scenarios include equipment mounting, structural steel connections, machinery assembly, and HVAC or plumbing equipment installation where 5/16-18 hardware is called out by the manufacturer or design spec. The Grade 8 rating makes it appropriate for high-load bolted joints where a lower-grade fastener would not meet the application requirement.

Key Features

• Grade 8 steel construction for high tensile strength in structural and mechanical bolted joints
• 5/16-18 UNC thread form for compatibility with standard inch-series tapped holes and nuts
• 1-1/2 inch length under head, partially threaded per ASME B18.2.1
• Zinc yellow dichromate finish for added corrosion resistance over bare steel
• Package quantity of 50 units reduces per-unit cost for high-volume fastener use

Compatibility

Designed for use in any application requiring a 5/16-18 UNC hex head cap screw meeting ASME B18.2.1 dimensional standards with a Grade 8 strength rating.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for a 5/16-18 hex head cap screw. Verify the mating tapped hole or nut is also rated to accept Grade 8 fastener loads before torquing. Follow applicable torque specifications from the equipment manufacturer or a recognized fastener torque table for Grade 8 hardware. Do not mix Grade 8 fasteners with lower-grade nuts or inserts in high-load applications.