Value Collection 721328BR Flat Socket Cap Screw 1-8x5in

Product Description

The VALUE COLLECTION 721328BR is a flat socket cap screw designed for structural and mechanical fastening applications where a flush or countersunk profile is required. Sized at 1-8 UNC thread with a 5-inch length, this screw features an 82-degree flat head and a hex socket drive. It is manufactured from alloy steel with a black oxide finish that provides moderate corrosion resistance and a low-reflectance appearance. The partially threaded shank allows for clamping force distribution across joined materials. Maintenance technicians, millwrights, and mechanical contractors install these in machinery assemblies, frames, and structural joints.

This screw is suited for general industrial, commercial, and mechanical maintenance applications. The 1-8 UNC thread pitch is a coarse-thread standard widely used in steel fabrication, heavy equipment assembly, and machine building. The black oxide finish makes it appropriate for interior installations where light rust resistance and appearance consistency are required. It is sold individually and is applicable where high-tensile alloy steel fasteners are specified by engineering drawings or maintenance standards.

Key Features

• 82-degree flat head seats flush in countersunk holes for a low-profile, snag-free surface
• Hex socket drive accepts a 5/8-inch hex key for high-torque installation in confined spaces
• Alloy steel construction provides high tensile and shear strength for structural fastening
• Black oxide finish reduces light reflection and offers light corrosion resistance for dry indoor service
• Partial threading allows the unthreaded shank to bear shear loads between clamped components
• Conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard inch-series flat socket cap screw for use in any application specifying a 1-8 UNC, 5-inch, 82-degree flat-head hex socket fastener per ASME/ANSI B18.3 or ASTM F835.

Installation Notes

Installation is typically performed by millwrights, maintenance mechanics, or mechanical contractors using a 5/8-inch hex key or socket driver. Countersunk hole geometry must match the 82-degree included angle to ensure proper head seating and load transfer. De-energize all equipment and relieve any stored mechanical or hydraulic pressure before disassembling or reassembling fastened assemblies. Thread engagement depth should meet engineering specifications for the joint; do not substitute this screw in applications requiring fine-thread or metric fasteners.