Value Collection 581115PR Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION 581115PR is a hex socket cap screw designed for precision fastening applications requiring a compact, high-strength threaded fastener. Sized at 4-40 UNC with a 3/16-inch length under head and a 3/32-inch hex drive, this screw is fully threaded from tip to head. Constructed from alloy steel with a black oxide finish coating, it meets ASME/ANSI B18.3 and ASTM A574 standards. The black oxide coating provides moderate corrosion resistance and reduces light reflection. This part is sold individually but requires a minimum order quantity of 100 units.

This fastener is suited for light-duty mechanical assemblies, electronic enclosures, instrumentation panels, and precision machine components where a low-profile socket cap screw is required. The 4-40 UNC thread is a fine, small-diameter unified national coarse thread commonly used in tight-tolerance applications across industrial, electrical, and mechanical trades. Installation is performed with a 3/32-inch hex key or Allen driver.

Key Features

• 4-40 UNC thread size for precision small-fastener applications
• Fully threaded body from tip to underside of head
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish coating for moderate corrosion resistance and reduced glare
• Conforms to ASME/ANSI B18.3 dimensional standards
• Requires a 3/32-inch hex key drive for installation and removal

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw for use in any application requiring an ASME/ANSI B18.3 compliant fastener of this thread size and length.

Installation Notes

Install and remove using a 3/32-inch hex key or T-handle Allen driver. Ensure mating threads are clean and free of debris before driving. Do not overtorque alloy steel cap screws in soft or thin base materials, as thread stripping can occur. Follow applicable mechanical assembly standards and equipment manufacturer torque guidelines for 4-40 fasteners.