Holo-krome 64060 Button Socket Cap Screw 5/16-18

Product Description

The HOLO-KROME 64060 is a button head socket cap screw designed for applications requiring a low-profile fastening solution with high clamping strength. This fully threaded alloy steel screw features a 3/16-inch hex socket drive and a black oxide finish that provides mild corrosion resistance and reduces light reflection in finished assemblies. It meets ANSI/ASME B18.3 and ASTM F835 standards and carries a thread fit class of 3A for consistent, reliable engagement. The 5/16-18 UNC thread and 7/8-inch length under head make it a common choice for mechanical assemblies, fixture work, and equipment fabrication where a flush or recessed button profile is preferred. Installed by machinists, millwrights, and maintenance technicians across industrial and commercial settings.

This screw is suited for use in metal fabrication, machine assembly, and industrial maintenance applications where a low-profile head is required to clear adjacent components or mating surfaces. The right-hand UNC thread pattern and 3A fit class make it compatible with standard tapped holes and threaded inserts in ferrous and non-ferrous assemblies. The black oxide finish is appropriate for indoor or lightly protected environments. Sold in multiples of 50.

Key Features

• Button head profile provides a low-profile, rounded appearance with a broad bearing surface
• 3/16-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction with 38 HRC hardness for high-load fastening applications
• Black oxide finish for mild corrosion resistance and reduced glare
• Fully threaded 5/16-18 UNC right-hand thread, 3A fit class
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-fit fastener for any application requiring a 5/16-18 UNC fully threaded button socket cap screw per ANSI/ASME B18.3.

Installation Notes

Installation requires a 3/16-inch hex key or socket bit driver. Ensure the mating tapped hole is clean and free of debris before driving. Do not exceed the rated torque capacity of the alloy steel material or the thread engagement of the mating component. Follow applicable mechanical and structural fastening codes for the specific application.