Holo-krome 720002570 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 720002570 is a hex socket cap screw designed for high-strength fastening in mechanical and structural assemblies. It features a 1/2-13 UNC thread size with a 6-1/4 inch length under head and is partially threaded, allowing it to clamp mating components without full thread engagement along the shank. The 3/8 inch hex drive socket head accepts a standard hex key or Allen driver. Constructed from alloy steel with a black oxide finish, it delivers corrosion resistance and reduced light reflection in service environments. This fastener conforms to ASME B18.3 and ASTM A574 standards. It weighs 0.3 pounds and is sold individually.

This screw is suited for use in industrial machinery, tooling fixtures, jigs, and mechanical equipment requiring a recessed-drive, high-strength fastener. The partially threaded shank provides accurate location and strong clamping force in through-bolt and tapped-hole applications. It is appropriate for both maintenance and OEM assembly work performed by millwrights, machinists, and mechanical contractors. The black oxide coating is commonly specified in environments where a low-profile, non-reflective finish is preferred or where light corrosion protection is needed alongside lubrication.

Key Features

• 1/2-13 UNC thread size for standard coarse-thread tapped holes
• 6-1/4 inch length under head - partially threaded shank
• 3/8 inch hex socket drive compatible with standard hex keys and bit drivers
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides light corrosion resistance and non-reflective appearance
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 1/2-13 UNC partially threaded fastener with a 3/8 inch hex drive and 6-1/4 inch length under head.

Installation Notes

Installation is typically performed by machinists, millwrights, or mechanical contractors using a calibrated torque wrench with the appropriate 3/8 inch hex bit. De-energize, de-pressurize, or otherwise render the assembly safe before fastener service. Apply a compatible thread lubricant or anti-seize compound when the joint design requires it, as alloy steel fasteners in metal assemblies can gall or seize without lubrication. Follow torque specifications defined by the equipment manufacturer or applicable industry standards for 1/2-13 UNC Grade 8 class fasteners.