Holo-krome 86039 Button Cap Screw M8x1.25 10mm

Product Description

The HOLO-KROME 86039 is a metric button socket cap screw designed for applications requiring a low-profile head and high tensile strength. Featuring an M8x1.25 thread size with 10mm length under the head, this fastener is fully threaded and driven by a 5mm hex socket. Manufactured from Grade 12.9 alloy steel with a black oxide finish, it delivers high hardness at 38 HRC and strong corrosion resistance in a compact form factor. It is used across industrial, mechanical, and equipment assembly applications where flush or near-flush fastening is required and torque capacity must be maintained.

This button cap screw is suited for machine assembly, panel mounting, and structural fastening tasks in manufacturing and maintenance environments. The low-profile button head reduces snag hazards in moving assemblies and tight clearance areas. The black oxide finish provides mild corrosion resistance and a consistent appearance. Right-hand thread direction follows standard metric convention, making this screw compatible with typical M8 tapped holes used throughout industrial fabrication.

Key Features

• Grade 12.9 alloy steel construction provides high tensile strength and hardness at 38 HRC
• M8x1.25 fully threaded design with 10mm length under head for shallow engagement applications
• 5mm hex socket drive for secure tool engagement and high torque transfer
• Button head profile with 14.0mm head diameter and 4.4mm head height reduces protrusion in assemblies
• Black oxide finish offers mild corrosion resistance and a uniform appearance
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in standard M8x1.25 metric tapped holes. Thread fit classes 4G and 6G are supported. Suitable for general industrial fastening applications where Grade 12.9 metric button head cap screws conforming to ANSI/ASME B18.3 are specified.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians using a calibrated 5mm hex key or socket driver. Ensure mating threads are clean and free of debris before installation. Apply appropriate thread-locking compound or fastener lubricant per the assembly specification. Torque to the value specified by the equipment manufacturer or applicable engineering standard for Grade 12.9 M8 fasteners.