Value Collection R52001352 Hex Cap Screw 7/8-9 Unc 12in

Product Description

The VALUE COLLECTION R52001352 is a partially threaded hex head cap screw designed for general-purpose fastening in structural and mechanical assemblies. It features a 7/8-9 UNC thread form and a 12-inch length under head, making it suitable for applications that require deep clamping reach with a unified coarse thread. The fastener is manufactured from Grade 2 steel with a zinc-plated finish for basic corrosion resistance. The 1-5/16-inch hex drive head is compatible with standard hex wrenches and impact sockets. This screw conforms to ASME B18.2.1 dimensional standards and is appropriate for use by maintenance technicians, millwrights, and general contractors working with ferrous assemblies.

This cap screw is used in light- to medium-duty structural connections, machinery mounting, and equipment fabrication where a partially threaded shank is needed to allow for bearing surfaces or clamping without full thread engagement along the grip length. The coarse UNC thread form offers good resistance to cross-threading and is well suited for steel-to-steel fastening in shop and field environments alike.

Key Features

• 7/8-9 UNC thread — coarse pitch for reliable engagement in steel applications
• 12-inch length under head — accommodates deep grip lengths and thick stack-ups
• Partially threaded shank — provides unthreaded grip zone for shear and bearing loads
• Grade 2 steel construction — meets standard tensile requirements for general-purpose use
• Zinc-plated finish — offers basic corrosion protection in dry indoor environments
• Conforms to ASME B18.2.1 dimensional standards

Compatibility

Designed as a general-purpose replacement or service fastener for assemblies requiring a 7/8-9 UNC hex head cap screw with a 12-inch length under head and partial threading per ASME B18.2.1.

Installation Notes

Installation is performed by maintenance technicians or millwrights using a 1-5/16-inch hex wrench or impact socket. Ensure mating threads are clean and free of debris before installation. De-energize or lock out any equipment before replacing fasteners in mechanical assemblies per applicable OSHA lockout/tagout procedures. Do not use this Grade 2 fastener as a direct substitute in applications specifying Grade 5 or Grade 8 hardware without verifying load requirements.