Value Collection MP39331 5/16-24 X 1-1/2 in Hex Cap Screw Gr8

Product Description

The Value Collection MP39331 is a Grade 8 steel hex head cap screw in a 5/16-24 UNF thread size with a 1-1/2 inch length under head. It features partial threading and a zinc yellow dichromate finish, which provides corrosion resistance and meets ASME B18.2.1 dimensional standards. This fastener is appropriate for high-strength bolting applications in mechanical assemblies, equipment fabrication, and maintenance work. Sold in a package of 50, it suits contractors and technicians who need reliable, specification-grade hardware on hand for demanding installations.

This screw is used in applications requiring a fine-thread, high-strength fastener under load. The 5/16-24 UNF thread pitch is common in precision assemblies and equipment where vibration resistance is a priority. The partial threading leaves an unthreaded shank section under the head, which is suited for applications requiring shear strength or where the fastener passes through a clearance hole before engaging a tapped bore. Suitable for HVAC equipment mounting, mechanical systems, and general fabrication tasks in trade and industrial environments.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 5/16-24 UNF fine thread for improved vibration resistance and clamping force
• Zinc yellow dichromate finish provides corrosion protection
• Partial threading with unthreaded shank for shear-load and clearance-hole applications
• Conforms to ASME B18.2.1 dimensional standards
• Packaged in quantities of 50 for shop stock and field use

Compatibility

Designed as a standard-dimension hex head cap screw per ASME B18.2.1, compatible with any tapped hole or nut conforming to 5/16-24 UNF thread specifications.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a properly sized hex wrench or socket. Always ensure the mating threaded hole or nut matches the 5/16-24 UNF thread specification before installation. De-energize and lock out any equipment before fastener replacement or assembly work. Do not exceed the rated proof load of Grade 8 hardware, and follow applicable equipment manufacturer torque guidelines where specified.