Holo-krome 64052 Button Socket Cap Screw 5/16-18

Product Description

The HOLO-KROME 64052 is a button head socket cap screw designed for applications requiring a low-profile fastening solution with high clamping strength. It features a 5/16-18 UNC thread and a 3/8-inch length under the head, driven by a 3/16-inch hex socket. Manufactured from alloy steel with a black oxide finish, the fastener carries a hardness rating of 38 HRC and meets ANSI/ASME B18.3 and ASTM F835 standards. The fully threaded shank and Class 3A thread fit deliver consistent engagement and reliable torque retention in demanding service environments. Licensed tradespeople and maintenance professionals working in industrial, mechanical, and structural assembly applications rely on this screw type for flush, clean installations where conventional hex or Phillips heads are impractical.

The 64052 is suited for light to medium-duty mechanical assemblies where a smooth, rounded head profile is required to reduce snagging or interference. Its black oxide finish provides mild corrosion resistance and reduces light reflection, making it a practical choice for machine guards, enclosures, fixtures, and equipment panels. The 3A thread class ensures a snug, precise fit in standard UNC tapped holes. This screw is typically purchased in multiples of 100 units and sold as single-piece packaging per order line.

Key Features

• Button head profile with 0.547-inch head diameter and 0.166-inch head height for low-profile fastening
• 3/16-inch hex socket drive for positive torque transfer and reduced cam-out risk
• Alloy steel construction rated at 38 HRC hardness for high-strength applications
• Black oxide finish provides mild corrosion resistance and matte appearance
• Fully threaded shank with Class 3A fit for precise engagement in UNC tapped holes
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in standard 5/16-18 UNC tapped holes per ANSI/ASME B18.3. Suitable for industrial machinery, mechanical assemblies, fixtures, and enclosures requiring a low-profile button head cap screw.

Installation Notes

Installation requires a 3/16-inch hex key or socket driver. Ensure the mating tapped hole is clean and free of debris before driving the fastener. Power down or de-energize any equipment before accessing fastener locations on live machinery. Follow applicable ANSI torque guidelines for 5/16-18 alloy steel fasteners and inspect thread engagement before applying final torque.