Holo-krome 65020 Button Socket Cap Screw 1/4-28

Product Description

The HOLO-KROME 65020 is a button socket cap screw designed for applications requiring a low-profile head and a secure hex socket drive. Manufactured from alloy steel with a black oxide finish, this fastener meets ANSI/ASME B18.3 and ASTM F835 standards. It features a 1/4-28 UNF thread form with a Class 3A thread fit and right-hand thread direction. The hardness rating of 38 HRC provides resistance to wear and shear in demanding mechanical assemblies. Licensed fastener technicians, millwrights, and maintenance mechanics working on equipment assemblies are the primary installers.

This screw is suited for industrial and mechanical assembly applications where a flush or near-flush head profile is required and clearance is limited. The 5/8-inch length under head and fully threaded shank make it appropriate for thin-stock fastening in ferrous and non-ferrous metal components. The black oxide finish offers mild corrosion resistance in controlled indoor environments. It is commonly used in machine frames, equipment guards, enclosures, and similar structural assemblies across manufacturing and maintenance trades.

Key Features

• Button head profile provides low clearance height of 0.1320 inches for tight-clearance assemblies
• 5/32-inch hex socket drive for precise torque application with standard hex keys or drivers
• Alloy steel construction rated at 38 HRC hardness for high-strength fastening
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Fully threaded shank with 1/4-28 UNF Class 3A right-hand thread
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 1/4-28 UNF button socket cap screw conforming to ANSI/ASME B18.3 for use in threaded holes or with compatible nuts in mechanical and industrial assemblies requiring a low-profile head.

Installation Notes

Installation is performed by qualified mechanics or maintenance technicians using a 5/32-inch hex key or socket driver. De-energize and lock out all equipment before fastener service per applicable OSHA lockout/tagout procedures. Do not exceed recommended torque for the fastener diameter and grade - refer to published torque tables for 1/4-28 alloy steel cap screws. Inspect thread engagement in the mating component before final torque to ensure full thread contact.