Holo-krome 86043 M8x1.25 Button Socket Cap Screw 16mm

Product Description

The HOLO-KROME 86043 is an M8x1.25 button socket cap screw with a 16mm length under head, designed for metric fastening applications requiring high strength and a low-profile head. Manufactured from Grade 12.9 alloy steel with a black oxide finish, it delivers a minimum hardness of 38 HRC and resists corrosion in typical indoor and light industrial environments. The 5mm hex socket drive provides positive torque transfer with standard hex keys or socket drivers. This fastener is fully threaded and right-hand threaded, conforming to ANSI/ASME B18.3 and ASTM F835 standards. Mechanical contractors, millwrights, OEM assemblers, and precision fabricators rely on Grade 12.9 button cap screws where flush clearance and high clamp load are both critical.

This screw is suited for machine assembly, fixture building, robotics, and structural fabrication where a low-profile button head is needed to clear adjacent components. The black oxide finish makes it appropriate for applications where a dark, non-reflective appearance is required alongside corrosion-inhibiting surface treatment. The fully threaded shank maximizes thread engagement across the full length under head, making it effective in blind-hole tapped assemblies common in CNC machine frames, jigs, and equipment panels.

Key Features

• Grade 12.9 alloy steel construction with 38 HRC hardness for high-strength fastening
• Black oxide finish provides mild corrosion resistance and low-reflectance appearance
• Button head profile keeps fastener below adjacent surfaces for clearance-critical assemblies
• 5mm hex socket drive compatible with standard metric hex keys and socket drivers
• Fully threaded shank with M8x1.25 right-hand thread and 4G/6G fit class
• Conforms to ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style metric button socket cap screw for use in any M8x1.25 tapped hole application conforming to ANSI/ASME B18.3 and ASTM F835 specifications.

Installation Notes

Installation requires a 5mm hex key or matching socket driver; use calibrated torque tools appropriate for Grade 12.9 fasteners to avoid over-torquing the alloy steel shank. Ensure the mating tapped hole is clean, free of debris, and threaded to a compatible metric pitch before driving. Anti-galling compounds are generally not required for alloy steel in steel assemblies, but consult applicable engineering specifications for your application. This fastener is sold in multiples of 100 units per minimum order quantity.