Value Collection 581363PR Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 581363PR is a hex socket cap screw designed for secure, high-torque fastening in tight-clearance applications where a wrench cannot reach. It features a 1/4-20 UNC thread with a 1/4 inch length under head and accepts a 3/16 inch hex drive. The alloy steel construction delivers high tensile strength, and the black oxide finish provides moderate corrosion resistance and reduces light reflection in precision assemblies. It is fully threaded from the bearing surface to the tip. Machinists, maintenance technicians, and fabricators install this fastener in machine components, jigs, fixtures, and structural assemblies.

This screw is suited for applications requiring a flush or recessed fastener head in metalworking, manufacturing, and general mechanical assembly. The 1/4-20 UNC thread is one of the most common unified coarse-thread sizes, making this screw a standard fit across a wide range of tapped holes in steel, aluminum, and other machinable materials. It is compliant with ASME/ANSI B18.3 and ASTM A574 fastener standards, which specify dimensional and mechanical requirements for socket cap screws.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard tapped holes
• 3/16 inch internal hex drive for use with standard hex keys and Allen drivers
• Fully threaded along the 1/4 inch length under head for maximum thread engagement
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish adds mild corrosion resistance and a low-glare surface
• Meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards

Compatibility

Designed as an OEM-style replacement or standard-fit fastener for any application requiring a 1/4-20 UNC hex socket cap screw with a 1/4 inch length under head and a 3/16 inch drive.

Installation Notes

Install using a calibrated hex key or Allen driver sized to exactly 3/16 inch to prevent drive recess damage. Ensure the mating tapped hole is clean and free of debris before threading. Power down or de-energize any equipment before accessing fastener locations in live assemblies. Follow applicable industry or equipment manufacturer torque specifications, as none are specified for this fastener in the available product data.