Holo-krome 60100 Flat Socket Cap Screw 3/8-16 X 1 in

Product Description

The HOLO-KROME 60100 is a flat socket cap screw designed for flush or countersunk fastening applications in industrial and mechanical assemblies. It features an 82-degree flat head with a 7/32-inch hex socket drive, allowing installation with a standard hex key in recessed or countersunk holes. The 3/8-16 UNC thread is fully threaded along its 1-inch overall length, providing consistent clamp load and thread engagement throughout. Manufactured from alloy steel with a black oxide finish, it delivers strong corrosion resistance suitable for demanding service environments. Thread fit class is 3A. Hardness is rated at 39 to 44 HRC, meeting ASME B18.3 and ASTM F835 standards.

This screw is suited for machine tool fixtures, jigs, dies, and structural assemblies where a flush or low-profile fastener head is required. The countersunk flat head seats flush with the mating surface, eliminating protrusions that could interfere with moving parts or mating components. It is commonly installed by machinists, millwrights, and maintenance technicians in manufacturing, automation, and general industrial settings where controlled torque and precise thread fit are required.

Key Features

• 82-degree flat countersunk head seats flush with surface for low-profile assembly
• 7/32-inch hex socket drive for standard Allen key installation
• Fully threaded 3/8-16 UNC at 3A fit class for consistent thread engagement
• Alloy steel construction with 39 to 44 HRC hardness for high-strength fastening
• Black oxide finish provides moderate corrosion resistance and reduces light reflection
• Meets ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard inch-series flat socket cap screw compatible with any 3/8-16 UNC countersunk hole machined to ASME B18.3 specifications.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 7/32-inch hex key or Allen driver. Ensure the mating countersink is machined to the correct 82-degree angle and diameter to achieve proper head seating. Torque to the value specified by the assembly engineer based on joint requirements and material. De-energize and lock out any machinery before servicing fasteners in live equipment per applicable OSHA lockout/tagout procedures.