Holo-krome 86041 Button Socket Cap Screw M8x1.25 12mm

Product Description

The HOLO-KROME 86041 is a metric button socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and precision fabrication work. Sized at M8x1.25 with a 12mm length under head, this screw is fully threaded and features a hex socket drive requiring a 5mm hex key. It is manufactured from grade 12.9 alloy steel, making it one of the highest-strength classifications in the metric fastener system, with a hardness rating of 38 HRC. The black oxide finish provides mild corrosion resistance and a low-profile appearance. Machinists, millwrights, and maintenance technicians commonly install this fastener in tight-clearance applications where a low-profile button head is required.

This button socket cap screw is suited for use in machinery frames, fixtures, jigs, and equipment housings where high clamp load and a flush or near-flush head profile are needed. The metric M8x1.25 thread pitch and 4G/6G thread fit class make it compatible with standard metric threaded assemblies across manufacturing, automation, and industrial maintenance environments. It meets ANSI/ASME B18.3 and ASTM F835 fastener standards, making it appropriate for applications that require documented compliance with recognized dimensional and mechanical specifications.

Key Features

• Grade 12.9 alloy steel construction with 38 HRC hardness for maximum tensile strength
• Button head profile provides low clearance height of 4.4mm for tight-space installations
• 14.0mm head diameter distributes clamping load over a wider bearing surface
• 5mm hex socket drive for precise torque application with standard hex keys or Allen drivers
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Meets ANSI/ASME B18.3 and ASTM F835 standards for dimensional and mechanical compliance

Compatibility

Designed for use in standard metric M8x1.25 threaded assemblies with 4G or 6G thread fit class. Suitable for any application requiring a button head cap screw conforming to ANSI/ASME B18.3 and ASTM F835 specifications.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 5mm hex key or socket driver. Always ensure the mating threaded hole is clean and free of debris before installation. Power down and de-energize any equipment before accessing fastened assemblies in live machinery. Do not substitute a lower-grade fastener in applications that specify grade 12.9 hardware, as mechanical failure may result.