Value Collection 581113PR Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION 581113PR is a hex socket cap screw designed for precision fastening applications where a low-profile, high-strength connection is required. Sized at 4-40 UNC with a 1/8 inch length under head, this screw is fully threaded and driven with a 3/32 inch hex key. The alloy steel construction delivers solid tensile strength for its size class, and the black oxide coating provides a measure of corrosion resistance and surface hardness. It is commonly installed by machinists, assembly technicians, and maintenance professionals working on light mechanical assemblies, electrical enclosures, and precision equipment.

This screw is suited for applications requiring a fine 4-40 UNC thread pitch in tight-clearance environments. The socket cap head allows driving in recessed or confined spaces where a standard hex head wrench cannot reach. Typical use cases include instrument panels, circuit board standoffs, small motor housings, and other light-duty mechanical assemblies where controlled torque and flush or recessed fastener seating are necessary. This item is sold individually but carries a minimum order quantity of 100 units per order.

Key Features

• 4-40 UNC thread size for fine-pitch, high-precision fastening
• Fully threaded along the 1/8 inch length under head for maximum thread engagement
• 3/32 inch hex socket drive for use with standard Allen or hex key tools
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish reduces surface corrosion and minimizes light reflection in low-visibility assemblies

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw per ASME/ANSI B18.3, suitable for use in any tapped hole or threaded insert conforming to 4-40 UNC specifications.

Installation Notes

Install with a calibrated hex key or Allen driver sized at 3/32 inch. Verify that mating threads are clean and free of debris before driving. Avoid over-torquing this small-diameter fastener, as alloy steel screws at the 4-40 size can be susceptible to thread stripping in softer base materials. Follow applicable assembly or equipment manufacturer torque guidelines when specified.