Holo-krome 64084 Button Socket Cap Screw 5/8-11

Product Description

The HOLO-KROME 64084 is a button head socket cap screw designed for fastening applications that require a low-profile head and high tensile strength. It features a 5/8-11 UNC thread with a 3A fit class and a 1-inch length under head, making it suitable for structural and mechanical assemblies where a flush or near-flush surface is needed. The alloy steel construction is finished in black oxide for corrosion resistance. The hex socket drive accepts a 3/8-inch hex key for installation and removal. This fastener meets ANSI/ASME B18.3 and ASTM F835 standards and carries a hardness rating of 38 HRC.

This screw is used in general industrial, mechanical, and equipment assembly applications. Its button head profile reduces interference with adjacent components compared to standard hex cap screws. Typical installations include machine frames, brackets, fixtures, and panel assemblies in manufacturing, maintenance, and field service environments. It is installed by machinists, millwrights, maintenance technicians, and field service personnel working with threaded metal assemblies.

Key Features

• 5/8-11 UNC thread, right-hand direction, 3A fit class for standard tolerance fastening
• 1-inch length under head, fully threaded
• Button head profile with 1.0000-inch head diameter for low-profile installations
• Alloy steel construction rated at 38 HRC hardness
• Black oxide finish for mild corrosion resistance
• Meets ANSI/ASME B18.3 and ASTM F835 standards

Compatibility

Designed as a standard 5/8-11 UNC button socket cap screw suitable for threaded holes and through-hole assemblies requiring ANSI/ASME B18.3 compliant fasteners in alloy steel.

Installation Notes

Install using a 3/8-inch hex key or hex socket driver; ensure the mating threaded hole or nut meets 3A/3B tolerance specifications for proper fit. De-energize and lock out all equipment before replacing or installing fasteners in live mechanical or electrical assemblies. Do not exceed the rated torque range for 5/8-11 alloy steel fasteners as specified in applicable torque tables for the assembly. Fastener replacement in pressure-bearing or load-critical structures should be performed by a qualified technician following applicable codes.