Holo-krome 64068 Button Socket Cap Screw 3/8-16

Product Description

The HOLO-KROME 64068 is a button socket cap screw designed for applications where a low-profile fastener head and high tensile strength are both required. The button head style provides a wider bearing surface than a standard socket cap screw while keeping the overall head height low at 0.199 inches. Manufactured from alloy steel with a black oxide finish, this screw carries a hardness rating of 38 HRC and meets ANSI/ASME B18.3 and ASTM F835 standards. The hex socket drive accepts a 7/32 inch hex key. This fastener is fully threaded and suited for mechanical assemblies, jigs, fixtures, and fabricated steel components.

This screw is a common choice in industrial maintenance, machine building, and structural assembly work where flush or near-flush fastening is preferred. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it appropriate for tooling plates, guards, and equipment enclosures. The 3A thread fit class ensures a snug, precise fit in tapped holes. Installation is typically performed by machinists, millwrights, maintenance technicians, and general fabricators working with ferrous and alloy steel assemblies.

Key Features

• Button head profile with a head height of 0.199 inches and head diameter of 0.656 inches for low-profile installations
• Alloy steel construction rated at 38 HRC hardness for high-strength fastening
• Black oxide finish for mild corrosion resistance and reduced surface reflectivity
• 3A thread fit class with right-hand UNRC thread for precise engagement in standard tapped holes
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards
• Fully threaded along the 3/4 inch length under head for maximum thread engagement

Compatibility

Designed as an OEM-style and general-use replacement or addition for standard 3/8-16 UNC tapped holes requiring a button socket cap screw per ANSI/ASME B18.3.

Installation Notes

Installation requires a 7/32 inch hex key or hex socket bit driver. Ensure the mating tapped hole is clean and free of debris before driving the fastener. Apply appropriate thread lubricant or thread-locking compound as required by the assembly specification. Do not exceed the rated torque for the alloy steel material grade and thread size as defined by your applicable engineering or maintenance standard.