Holo-krome 86017 Button Cap Screw M5x0.8 12mm Grade 12.9

Product Description

The HOLO-KROME 86017 is a metric button socket cap screw designed for fastening applications that require a low-profile head and high-strength clamping force. Manufactured from Grade 12.9 alloy steel with a black oxide finish, this screw delivers hardness of 38 HRC and resists corrosion in typical industrial environments. The M5x0.8 thread and 12mm length under head make it suited for compact assemblies where clearance is limited. Drive engagement is through a 3mm hex socket, allowing controlled torque application with standard Allen keys or hex bit drivers. This fastener is fully threaded and carries a right-hand thread direction.

This screw is used across a wide range of mechanical, industrial, and OEM assembly applications where a flush or near-flush head profile is needed and bolt-through clearance is tight. The button head style distributes clamping load over a wider bearing surface than a flat head, making it appropriate for softer substrate materials or thin panels. Typical installers include machine technicians, maintenance mechanics, and manufacturing assembly personnel working with metric-dimensioned components and fixtures.

Key Features

• Grade 12.9 alloy steel construction provides high tensile strength and hardness of 38 HRC
• Black oxide finish offers mild corrosion resistance and a low-reflectance surface
• Low-profile button head at 2.75mm head height reduces interference in tight assemblies
• 3mm hex socket drive allows precise torque application with standard hex tools
• Fully threaded shank ensures full thread engagement across the entire 12mm length under head
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a metric replacement or OEM-specification button socket cap screw for assemblies requiring an M5x0.8 thread with a 12mm length under head and Grade 12.9 strength rating.

Installation Notes

Installation requires a 3mm hex key or hex socket bit driver rated for high-torque applications. Confirm mating thread class compatibility, as this screw carries a 4G and 6G thread fit class per metric standards. Always verify that the base material and thread depth are adequate for the Grade 12.9 load rating before final assembly. Do not install with impact drivers at full torque without a torque-limiting adapter, as the high hardness of Grade 12.9 fasteners reduces ductility compared to lower-grade screws.