Value Collection 33721 Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The VALUE COLLECTION 33721 is a hex socket cap screw designed for high-strength bolted assemblies in industrial, mechanical, and structural applications. It features a 1-1/4-7 UNC thread and a 7/8-inch hex drive socket, allowing torque to be applied with a standard hex key or Allen wrench. The screw is fully threaded with a 3-inch length under head and is manufactured from alloy steel with a black oxide finish for corrosion resistance. Installation is performed by mechanical contractors, maintenance technicians, and millwrights working on heavy equipment, fixtures, or machinery frames.

This cap screw suits applications where a flush or recessed fastener head is required and high clamping force is necessary. The coarse 1-1/4-7 UNC thread pattern provides reliable engagement in standard tapped holes and is compatible with common inch-series tooling. It is used across general manufacturing, equipment assembly, and maintenance repair operations where alloy steel fasteners are specified.

Key Features

• 1-1/4-7 UNC coarse thread for strong engagement in inch-series tapped holes
• 3-inch length under head provides substantial grip length for thick joint stacks
• 7/8-inch hex socket drive for high-torque installation with standard hex keys
• Fully threaded shank maximizes thread engagement across the full grip length
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide coating reduces surface corrosion and provides a low-reflectance finish

Compatibility

Designed for use in standard 1-1/4-7 UNC tapped holes per ASME/ANSI B18.3 specifications. Suitable for general-purpose industrial and mechanical assemblies requiring inch-series coarse-thread socket cap screws.

Installation Notes

Installation is performed by mechanical technicians or maintenance personnel using a calibrated torque wrench with a 7/8-inch hex bit. De-energize and lock out all equipment before fastener installation or removal per applicable OSHA lockout/tagout procedures. Do not exceed the rated torque range for the fastener grade and do not substitute with fasteners of a lower material specification. Inspect mating tapped holes for damage or contamination before assembly.