Value Collection 581373PR Hex Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION 581373PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling, and structural connections. It features a 1/4-20 UNC thread and a 1-5/8 inch length under the head, driven by a 3/16 inch hex key. Constructed from alloy steel with a black oxide finish, it offers solid corrosion resistance for indoor and low-exposure outdoor use. Partially threaded shank provides clamping force in through-bolt configurations. Meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for precision and load-bearing fastening in professional trade and industrial settings.

This screw is suited for machinery maintenance, equipment assembly, and fabrication work where a recessed drive and controlled clamp load are required. The 1/4-20 UNC thread is one of the most common unified coarse thread sizes in North American mechanical applications. Partially threaded geometry makes it well-suited for clamping two or more components together where the unthreaded shank spans the joint interface. Sold individually with a minimum order quantity of 100 pieces per order.

Key Features

• 1/4-20 UNC thread for compatibility with standard tapped holes and nuts
• 1-5/8 inch length under head with partial threading for effective clamping
• 3/16 inch hex socket drive for use with standard hex keys or Allen drivers
• Alloy steel construction meeting ASTM A574 for high tensile strength
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any application requiring ASME/ANSI B18.3 and ASTM A574 compliant fasteners with a 3/16 inch hex drive.

Installation Notes

Installation is performed by machinists, millwrights, and general tradespeople using a 3/16 inch hex key or Allen driver. Ensure the receiving thread is clean and properly tapped to 1/4-20 UNC before installation. Apply thread lubricant or thread-locking compound as required by the application or applicable mechanical code. Never use an impact driver on socket cap screws without a rated socket adapter, as this can damage the drive recess.