Holo-krome 87056 Flat Socket Cap Screw M5x0.8 Alloy Steel

Product Description

The HOLO-KROME 87056 is a metric flat socket cap screw designed for flush or countersunk fastening applications in precision assemblies. It features a 90-degree flat head with a 3.00 mm hex socket drive and is fully threaded along its M5x0.8 shank. Manufactured from 12.9 grade alloy steel with a black oxide finish, it delivers high tensile strength and moderate corrosion resistance. The overall length is 10.00 mm, with a head diameter of 11.20 mm. This fastener meets ANSI B1.13M and ISO 10642 standards, making it a reliable choice for metric-standard mechanical and industrial assemblies requiring close-tolerance fitment.

This screw is used wherever a flush or low-profile fastening point is required in metal-to-metal assemblies. Typical applications include machine frames, fixtures, tooling plates, and precision mechanical components where a protruding head is not acceptable. The 12.9 alloy steel grade provides higher clamp load capacity than standard 8.8 or 10.9 fasteners, making it suitable for high-stress joints. Installers working on CNC equipment, hydraulic components, industrial machinery, or structural fixtures commonly specify this grade and head style.

Key Features

• 90-degree flat head profile seats flush in countersunk holes for low-profile assemblies
• 3.00 mm hex socket drive for standard Allen key or hex bit installation
• 12.9 alloy steel grade provides high tensile and proof load ratings
• Black oxide finish offers moderate surface protection and reduces light reflection
• Fully threaded shank along the 10.00 mm overall length
• Conforms to ANSI B1.13M and ISO 10642 fastener standards

Compatibility

Designed as an OEM-style metric flat socket cap screw for use in countersunk metric applications conforming to ISO 10642 and ANSI B1.13M specifications with M5x0.8 thread engagement.

Installation Notes

Installation is typically performed by maintenance technicians or machinists using a 3.00 mm hex key or hex socket bit. Verify that the mating countersunk hole is machined to the correct 90-degree angle before seating the fastener. De-energize and lock out any equipment before servicing fastened assemblies per applicable safety procedures. Do not exceed the rated clamp load for the 12.9 grade or substitute lower-grade fasteners in high-stress joints.