Value Collection 592665PR Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 592665PR is a partially threaded hex socket cap screw designed for precision fastening in structural and mechanical assemblies. It features a 1/4-20 UNC thread size with a 5-inch length under head, driven by a 3/16-inch hex (Allen) key. Constructed from 18-8 austenitic stainless steel with a black oxide coating, this fastener resists corrosion while the coating adds a layer of mild surface protection and reduces light reflection. It meets ASME/ANSI B18.3 and ASTM F837 standards, making it suitable for applications requiring documented fastener compliance.

This cap screw is used in mechanical, industrial, and structural assemblies where a flush or recessed drive fastener is required. The partial threading allows the shank to act as a locating or clamping element, making it well suited for through-bolt applications, machine frames, fixtures, and equipment enclosures. It is installed by machinists, maintenance technicians, and fabricators working in environments where stainless steel corrosion resistance is a priority.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard inch-series tapped holes
• 5-inch length under head accommodates deeper stack assemblies
• Partially threaded shank provides clamping and alignment in through-bolt configurations
• 18-8 austenitic stainless steel (Material Grade A2) for corrosion resistance
• Black oxide coating adds mild surface protection and low-reflectance appearance
• Meets ASME/ANSI B18.3 and ASTM F837 fastener standards

Compatibility

Designed as a standard-specification hex socket cap screw compatible with any 1/4-20 UNC tapped hole or threaded insert requiring a 3/16-inch hex drive and a 5-inch partially threaded fastener.

Installation Notes

Install using a 3/16-inch hex key or Allen-head driver bit. Ensure the mating tapped hole is clean and free of debris before threading to avoid galling, which stainless steel fasteners are susceptible to — apply an appropriate anti-seize compound when mating to stainless or aluminum threads. De-energize or lock out any equipment before performing fastener installation or removal on live machinery.