Holo-krome 64080 Button Socket Cap Screw 1/2-13

Product Description

The HOLO-KROME 64080 is a 1/2-13 button socket cap screw designed for demanding mechanical assembly applications where a low-profile head and high clamping strength are required. Manufactured from alloy steel with a black oxide finish, this fully threaded fastener meets ANSI/ASME B18.3 and ASTM F835 standards. It is driven by a 5/16-inch hex socket and features a right-hand UNC thread fit class 3A. The hardness rating of 38 HRC makes it suitable for high-stress fastening scenarios encountered in industrial, mechanical, and structural assemblies. Licensed trades and maintenance professionals working with machinery, fixtures, or structural components rely on this screw for consistent, repeatable clamping performance.

This button socket cap screw is used in applications where a standard hex head would interfere with adjacent components or where a smooth, rounded head profile is preferred. Common install scenarios include machine frames, jigs, fixtures, and equipment panels in commercial and industrial settings. The 1-1/2-inch length under head and 1/2-13 thread pitch suit medium-to-heavy-duty bolted joints in steel and alloy assemblies.

Key Features

• Alloy steel construction rated at 38 HRC for high-strength fastening
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• 5/16-inch hex socket drive for secure torque transfer
• Fully threaded, right-hand UNC thread class 3A for consistent fit
• Compliant with ANSI/ASME B18.3 and ASTM F835 fastener standards
• Low-profile button head at 0.265 inches tall with 0.875-inch head diameter minimizes protrusion

Compatibility

Designed as a standard 1/2-13 UNC button socket cap screw per ANSI/ASME B18.3 and ASTM F835, suitable for use in any application requiring a class 3A fit alloy steel button head fastener in that thread size.

Installation Notes

Installation should be performed by qualified mechanical or maintenance trades familiar with torque requirements for alloy steel fasteners. Always verify that the mating tapped hole or nut meets the same thread standard and fit class before installation. A calibrated torque wrench and properly sized 5/16-inch hex key or socket bit should be used to avoid stripping the drive recess. De-energize, depressurize, or otherwise make safe any equipment before replacing or installing fasteners in service.