Value Collection MP39034 Hex Cap Screw 5/16-18 Grade 8 25pk

Product Description

The VALUE COLLECTION MP39034 is a partially threaded hex head cap screw manufactured from Grade 8 steel with a zinc yellow dichromate finish. Grade 8 steel delivers high tensile strength suited to demanding fastening applications where lower-grade hardware would fail under load. The zinc yellow dichromate coating provides corrosion resistance and is easy to identify at a glance on the job. The screw measures 5/16-18 thread size with a 2-1/4 inch length under head and follows a Unified National Coarse (UNC) thread standard. It conforms to ASME B18.2.1 dimensional standards. This fastener is sold in a package quantity of 25 units, making it practical for both single repairs and recurring maintenance work.

This cap screw is appropriate for mechanical assemblies, structural connections, and equipment mounting applications that require a high-strength inch-series fastener. It is commonly used by maintenance technicians, millwrights, and field service professionals working on industrial machinery, HVAC equipment frames, plumbing supports, and general mechanical systems. The partial threading allows for a smooth shank section, which is preferred in applications requiring precise clamping without thread engagement through the full grip length.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish for corrosion resistance and visual identification
• 5/16-18 UNC thread for broad inch-series hardware compatibility
• Partially threaded shank for controlled clamping in structural applications
• Meets ASME B18.2.1 dimensional standard
• Packaged in quantities of 25 units per order

Compatibility

Designed as a standard inch-series hex head cap screw for use wherever a 5/16-18 UNC Grade 8 fastener meeting ASME B18.2.1 is specified.

Installation Notes

Install with a standard hex wrench or socket set appropriate for a 5/16-inch hex head fastener. Ensure mating threads are clean and free of debris before installation. De-energize and lock out any equipment before replacing fasteners on live assemblies. Do not mix Grade 8 hardware with lower-grade nuts or washers, as mismatched hardware grades can compromise joint integrity.