Value Collection A997156 Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The VALUE COLLECTION A997156 is a heavy-duty hex socket cap screw engineered for high-strength fastening applications in industrial, mechanical, and structural assemblies. Featuring a 1-1/4-7 UNC thread size and a 10-inch length under head, this fastener delivers the clamping force required in demanding service environments. The 7/8-inch hex drive accepts standard hex keys and socket drivers for high-torque installation. Constructed from alloy steel with a black oxide finish, the screw resists corrosion and surface wear while maintaining the mechanical integrity expected of ASME/ANSI B18.3 and ASTM A574 compliant fasteners. Partial threading allows for precise load distribution across the unthreaded shank.

This screw is suited for heavy equipment assembly, machinery mounting, structural steel connections, and industrial maintenance applications where large-diameter, high-strength fasteners are specified. The 1-1/4-7 UNC coarse thread pattern seats quickly and is well-suited for thicker stock materials and applications subject to vibration. Machinists, millwrights, maintenance technicians, and mechanical contractors typically specify this fastener class when tensile strength and dimensional consistency are critical to the joint.

Key Features

• 1-1/4-7 UNC coarse thread for fast seating and strong clamping in thick materials
• 10-inch length under head accommodates deep through-bolt and long-reach applications
• 7/8-inch internal hex drive accepts standard socket and hex key tooling
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish reduces surface corrosion and minimizes galling during installation
• Partially threaded shank distributes load along the unthreaded body
• Meets ASME/ANSI B18.3 and ASTM A574 standards for dimensional and mechanical compliance

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for industrial and mechanical assemblies requiring a 1-1/4-7 UNC hex socket cap screw with a 10-inch length under head and 7/8-inch drive.

Installation Notes

Installation should be performed by qualified mechanical technicians or millwrights using a properly sized 7/8-inch hex key or socket driver rated for the required torque. De-energize and lock out all associated equipment before fastener removal or installation per applicable OSHA lockout/tagout procedures. Inspect threads for damage or contamination before seating. Do not use impact tools at full power during final seating without verifying the specified torque value for the joint application.