Holo-krome 87140 M8x1.25 Flat Socket Cap Screw 12.9

Product Description

The HOLO-KROME 87140 is a metric flat socket cap screw designed for flush or countersunk fastening applications where a low-profile head is required. It features an M8x1.25 thread size, a 5.00 mm hex socket drive, and a 90-degree flat head that seats flush with or below the mating surface. Manufactured from 12.9 grade alloy steel with a black oxide finish, it delivers high tensile strength and moderate corrosion resistance in demanding mechanical assemblies. The screw is fully threaded along its 35.00 mm overall length, conforming to ANSI B1.13M and ISO 10642 standards.

This fastener is suited for precision mechanical assemblies, machine frames, tooling fixtures, and industrial equipment where a countersunk socket head is specified. The metric thread class 4G fit provides controlled clearance for consistent seating in tapped holes. It is commonly specified by maintenance mechanics, machine builders, and OEM assembly technicians working with metric-standard components requiring high-strength fasteners in tight or recessed installations.

Key Features

• M8x1.25 fully threaded, 35.00 mm overall length for deep engagement in tapped metric holes
• 12.9 grade alloy steel construction provides high tensile and proof load strength
• 90-degree flat head with 17.92 mm head diameter for flush countersunk seating
• 5.00 mm hex socket drive accepts standard metric hex keys and socket bits
• Black oxide finish offers mild corrosion resistance and reduced light reflection
• Conforms to ANSI B1.13M and ISO 10642 fastener standards for dimensional consistency

Compatibility

Designed as a direct-fit replacement or standard metric fastener for applications requiring an ISO 10642 countersunk socket head cap screw in M8x1.25 thread with 4G thread fit class.

Installation Notes

Installation is performed by maintenance mechanics or assembly technicians using a 5.00 mm hex key or socket driver. Ensure the mating surface is countersunk to the correct 90-degree angle and diameter before installation. De-energize, de-pressurize, or otherwise make safe any equipment before disassembling fastened joints. Do not exceed the torque rating specified in the equipment manufacturer's service documentation for 12.9 grade M8 fasteners.