Value Collection 581769BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 581769BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. The screw features a 7/8-9 UNC thread and measures 14 inches in length under the head, making it well suited for deep-reach bolting in heavy equipment and machinery. It is partially threaded, which distributes clamping load effectively along the shank. Constructed from alloy steel and finished with a black oxide coating, it offers increased hardness and moderate corrosion resistance. Millwrights, maintenance mechanics, and fabricators install these fasteners in production and repair settings.

This screw is used in industrial manufacturing, heavy equipment maintenance, structural fabrication, and general mechanical assembly. The 7/8-9 UNC thread size is a standard coarse-thread designation common in North American industrial equipment. The 3/4 inch hex drive is compatible with standard hex keys and socket drive tools. Partially threaded shanks are preferred when clamping unthreaded material between a bearing surface and a mating threaded component. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for demanding load-bearing joints.

Key Features

• 7/8-9 UNC coarse-thread specification for high-clamping-load applications
• 14 inch length under head accommodates deep-reach or thick-stack assemblies
• Partially threaded shank provides full shank bearing surface for shear-load joints
• Alloy steel construction delivers high tensile and proof-load strength
• Black oxide finish provides moderate corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard-dimension hex socket cap screw for any application requiring a 7/8-9 UNC coarse-thread fastener with a 3/4 inch hex drive and a 14 inch length under head per ASME/ANSI B18.3.

Installation Notes

Installation is performed by millwrights, maintenance mechanics, or qualified assemblers using a 3/4 inch hex key or hex socket drive tool. Ensure the mating tapped hole or nut thread specification matches 7/8-9 UNC before installation. De-energize and lock out all equipment per applicable OSHA lockout/tagout procedures before fastener installation or removal. Do not substitute a lower-grade fastener in joints designed to ASTM A574 specification.