Holo-krome 60014 Flat Socket Cap Screw 5-40 X 3/8 in Alloy Steel

Product Description

The HOLO-KROME 60014 is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head driven by a 5/64-inch hex socket and is fully threaded along its 3/8-inch overall length. The 5-40 UNC thread with a Class 3A fit provides close tolerances and reliable engagement in precision assemblies. Manufactured from alloy steel with a black oxide finish, the fastener delivers hardness in the 39-44 HRC range for high-strength clamping. This screw is installed by machinists, maintenance technicians, and mechanical assemblers working on light mechanical and instrument-grade assemblies.

This screw is suited for low-profile fastening tasks where a standard socket cap head would protrude above the mating surface. The 5-40 thread size and 3/8-inch length make it appropriate for thin panels, small enclosures, precision instruments, and light-duty mechanical assemblies where head clearance is limited. The black oxide finish provides mild corrosion resistance and reduces light reflection in service environments where appearance and surface contrast matter. Sold individually with a minimum order quantity of 100 pieces.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 5/64-inch hex socket drive for precise torque application in tight spaces
• Fully threaded 3/8-inch overall length for maximum thread engagement in thin materials
• Alloy steel construction with 39-44 HRC hardness for high-strength fastening
• Black oxide finish for mild corrosion resistance and low-reflectance appearance
• Class 3A thread fit meets ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-use fastener for applications requiring a 5-40 UNC fully threaded flat socket cap screw with an 82-degree countersink angle, conforming to ASME B18.3 and ASTM F835 standards.

Installation Notes

Installation is performed with a calibrated 5/64-inch hex key or hex bit driver. Ensure the mating part features an 82-degree countersunk hole sized for the 0.281-inch head diameter before installation. Do not use an undersized or worn hex key, as this can strip the socket drive. Follow applicable torque guidelines from the fastener standard for the 5-40 thread class and material combination.