Holo-krome 64046 Button Socket Cap Screw 1/4-20

Product Description

The HOLO-KROME 64046 is a 1/4-20 button socket cap screw designed for applications requiring a low-profile, high-strength fastener. Manufactured from alloy steel with a black oxide finish, this screw delivers a hardness rating of 38 HRC and meets ANSI/ASME B18.3 and ASTM F835 standards. It features a hex socket drive sized at 5/32 inch and is fully threaded with a 3A thread fit class to UNRC standards. The 3/4-inch length under head and 0.437-inch head diameter make it well suited for flush or near-flush installations in tight clearance assemblies. Licensed tradespeople and maintenance professionals install this fastener using a standard hex key or Allen driver.

This button socket cap screw is used in general mechanical assemblies, machine guarding, enclosures, and structural sub-assemblies where a domed, low-profile head is preferred over a flat or pan head. The right-hand thread and 3A fit class make it compatible with standard 1/4-20 tapped holes and threaded inserts across a wide range of industrial and commercial applications. Its black oxide coating provides mild corrosion resistance and reduces light reflection in finished assemblies.

Key Features

• Alloy steel construction with 38 HRC hardness for high-strength fastening
• Black oxide finish provides mild corrosion resistance and a matte appearance
• 5/32-inch hex socket drive for use with standard Allen or hex key tools
• Fully threaded 1/4-20 UNC right-hand thread with 3A fit class
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards
• Low-profile button head at 0.132-inch head height suits tight clearance assemblies

Compatibility

Designed as a standard 1/4-20 UNC button socket cap screw compatible with any 1/4-20 tapped hole or threaded insert conforming to UNRC thread standards in industrial, commercial, or mechanical assembly applications.

Installation Notes

Install using a 5/32-inch hex key or Allen driver. De-energize or lock out any equipment before fastener installation or removal per applicable safety procedures. Ensure the mating tapped hole is clean and free of debris before driving to avoid cross-threading. Torque to values appropriate for 1/4-20 alloy steel fasteners as specified by the equipment manufacturer or applicable assembly standards.