Holo-krome 640000170 Button Socket Cap Screw 8-32

Product Description

The HOLO-KROME 640000170 is a button socket cap screw designed for threaded fastening applications requiring a low-profile head and high tensile strength. This screw features a hex socket drive in 3/32-inch size and a 5/16-inch length under the head, with fully threaded 8-32 UNC right-hand threads at a 3A fit class. The button head style provides a domed, low-profile appearance suited to recessed or flush-mount assemblies. Constructed from alloy steel with a black oxide finish, it meets ANSI/ASME B18.3 and ASTM F835 standards. Hardness is rated at 38 HRC. Machinists, maintenance technicians, and mechanical assembly professionals are the primary installers.

This screw is suited for light-duty to medium-duty mechanical assemblies where a smooth, low-profile fastener head is required and access allows a hex key or T-handle driver. Common applications include machine panels, brackets, guards, enclosures, and precision equipment frames. The black oxide finish provides mild corrosion resistance in dry or lightly oiled indoor environments. The 8-32 thread size is widely used across instrumentation, HVAC equipment panels, and electrical enclosure hardware. Minimum order quantity is 100 pieces; package quantity is 1.

Key Features

• Button head style with 0.312-inch head diameter and 0.087-inch head height for low-profile installations
• Hex socket drive, 3/32-inch size, compatible with standard hex keys and T-handle drivers
• Fully threaded 8-32 UNC right-hand thread at 3A fit class for precise thread engagement
• Alloy steel construction rated at 38 HRC hardness for reliable load performance
• Black oxide finish for mild corrosion resistance in indoor environments
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 8-32 UNC button socket cap screw replacement or new-installation fastener for threaded assemblies conforming to ANSI/ASME B18.3 specifications.

Installation Notes

Installation requires a 3/32-inch hex key or appropriate T-handle driver. Power down or de-energize any equipment before fastening into electrical enclosures or control panels. Do not over-torque button head cap screws, as the lower head profile reduces drive engagement compared to standard socket head styles. Follow applicable ANSI or equipment manufacturer torque guidelines for the 8-32 thread class.