Holo-krome 73064 Hex Socket Cap Screw 1/4-28 Unf Alloy Steel

Product Description

The HOLO-KROME 73064 is a hex socket cap screw designed for applications requiring a compact, high-strength fastener with a recessed drive. Threaded 1/4-28 UNF and measuring 1 inch in length under the head, this screw is fully threaded along its entire shank. The 3/16-inch hex socket drive accepts a standard Allen wrench or hex key. Manufactured from alloy steel with a black oxide finish, it meets ASME B18.3 and ASTM A574 standards. It is commonly installed by millwrights, maintenance technicians, and mechanical contractors working on precision assemblies where flush or countersunk fastening is required.

This screw is suited for use in tight clearance areas where a conventional hex head fastener cannot be driven. The fine UNF thread pitch provides strong clamping force and resistance to loosening under vibration, making it a practical choice for equipment panels, machine guards, brackets, and similar mechanical assemblies in both industrial and light commercial settings. Minimum order quantity is 100 pieces.

Key Features

• 1/4-28 UNF fine thread for high clamping force and vibration resistance
• Fully threaded shank along the entire 1-inch length under head
• 3/16-inch hex socket drive for Allen wrench or hex key installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 dimensional standard

Compatibility

Designed as a standard 1/4-28 UNF hex socket cap screw per ASME B18.3, compatible with any tapped hole or threaded insert sized to 1/4-28 UNF specifications.

Installation Notes

Install using a 3/16-inch hex key or Allen wrench; do not use an undersized key as it may strip the socket. Torque to the value specified by the assembly manufacturer or governing engineering standard for the applicable material and joint class. Verify thread engagement depth is adequate before final tightening. Follow all applicable mechanical and safety codes for the equipment being serviced.