Holo-krome 720001790 Hex Socket Cap Screw 3/8-16 50pk

Product Description

The HOLO-KROME 720001790 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and trade installations. It features a 3/8-16 UNRC thread size with a 3-3/4 inch length under head and is partially threaded for positive clamping force. The 5/16 inch hex drive allows use with standard Allen keys or hex bit drivers. Manufactured from alloy steel with a black oxide finish, this screw meets ASME B18.3 and ASTM A574 standards, making it appropriate for structural and load-bearing fastener applications. This package contains 50 screws.

Hex socket cap screws of this specification are commonly used in machine frames, pump housings, motor mounts, equipment brackets, and structural assemblies across HVAC, industrial, and mechanical trade work. The 3/8-16 coarse thread pattern provides reliable grip in steel, cast iron, and aluminum tapped holes. The black oxide coating offers mild corrosion resistance and reduced light reflection in finished assemblies. Installers working on equipment panels, blower assemblies, condenser frames, and related mechanical structures will find this screw size a standard fit for many OEM fastener positions.

Key Features

• 3/8-16 UNRC coarse thread for broad compatibility with standard tapped holes
• 3-3/4 inch length under head suits deeper fastening applications
• Partial threading provides clamping force against mating surfaces
• 5/16 inch hex socket drive compatible with standard Allen keys and hex bit sets
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish for mild corrosion resistance and clean appearance

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 3/8-16 UNRC partially threaded fastener with a 3-3/4 inch length under head.

Installation Notes

Installation should be performed by a qualified mechanic or trades professional using a calibrated hex key or socket driver sized to 5/16 inch. Always de-energize and lock out equipment before replacing fasteners on powered assemblies. Do not use impact drivers at full torque without a torque-limiting attachment, as this may damage the hex socket or thread engagement. Verify thread compatibility with the tapped hole before driving to prevent cross-threading.