Holo-krome 65018 Button Socket Cap Screw 1/4-28

Product Description

The HOLO-KROME 65018 is a button head socket cap screw designed for applications requiring a low-profile fastening solution with high strength. It features a 1/4-28 UNF thread and measures 1/2 inch in length under the head. The screw is fully threaded and manufactured from alloy steel with a black oxide finish, providing corrosion resistance in light-duty environments. A 5/32-inch hex socket drive is required for installation. It meets ANSI/ASME B18.3 and ASTM F835 fastener standards, with a hardness rating of 38 HRC and a Thread Fit Class of 3A. This part is typically installed by maintenance technicians, machinists, and field service professionals.

The HOLO-KROME 65018 is suited for mechanical assemblies where a standard hex cap screw head would create clearance issues. The low-profile button head reduces the overall protrusion above the mating surface. Common applications include machinery panels, equipment enclosures, jigs, fixtures, and structural assemblies requiring a fine-thread fastener. The right-hand thread direction and 3A thread fit class make this screw compatible with standard tapped holes in the 1/4-28 UNF specification.

Key Features

• Low-profile button head with 0.437-inch head diameter and 0.132-inch head height for clearance-sensitive assemblies
• Alloy steel construction with 38 HRC hardness for high tensile strength
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Fully threaded 1/4-28 UNF right-hand thread with 3A fit class for precise engagement
• Meets ANSI/ASME B18.3 and ASTM F835 standards
• 5/32-inch hex socket drive for use with standard Allen keys or hex bit drivers

Compatibility

Designed as an OEM-style replacement or standard fastener for any application requiring a 1/4-28 UNF fully threaded button socket cap screw conforming to ANSI/ASME B18.3 and ASTM F835 specifications.

Installation Notes

Installation requires a 5/32-inch hex key or socket bit driver. Ensure the mating tapped hole is clean and free of debris before threading to avoid cross-threading or galling. De-energize or lock out any equipment before fastener replacement on live machinery per applicable safety procedures. Do not exceed the torque capacity appropriate for the 1/4-28 thread size and alloy steel grade.