Value Collection MP39037 Hex Cap Screw 5/16-18 X 3-1/2 in Grade 8

Product Description

The Value Collection MP39037 is a Grade 8 steel hex head cap screw with a 5/16-18 UNC thread and a 3-1/2 inch length under head. It carries a zinc yellow dichromate finish for corrosion resistance and is partially threaded per ASME B18.2.1. This fastener is suited for high-strength bolted joint applications where a reliable, standardized cap screw is required. It is typically installed by maintenance technicians, millwrights, pipefitters, and general contractors working on structural, mechanical, or equipment assembly tasks.

This screw is appropriate for use in industrial equipment assembly, structural steel connections, and mechanical fabrication where Grade 8 strength and inch-series UNC threading are specified. The partial threading allows for a smooth shank bearing surface in clearance holes, making it well suited for shear-loaded joint applications. Sold in a package quantity of 25, it is a practical choice for shops and field crews that need consistent, specification-grade hardware on hand.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Partially threaded shank per ASME B18.2.1 standard
• 5/16-18 UNC thread for broad compatibility with inch-series hardware
• 3-1/2 inch length under head suits deeper grip and clearance applications
• Package quantity of 25 for shop stock and field use

Compatibility

Designed as a standard ASME B18.2.1 inch-series hex head cap screw for use with 5/16-18 UNC threaded nuts, inserts, and tapped holes in steel, iron, and compatible structural assemblies.

Installation Notes

Installation is typically performed by mechanical or maintenance trades using a standard hex wrench or socket set. Confirm that mating threads are clean and undamaged before assembly. Torque to joint-specification values referenced in the applicable engineering or equipment documentation. Never install fasteners in energized or pressurized equipment without first following the relevant lockout/tagout procedure.