Holo-krome 87050 M4x0.7 Flat Socket Cap Screw 12.9

Product Description

The HOLO-KROME 87050 is a metric flat socket cap screw designed for flush or countersunk fastening applications where a low-profile head is required. It features an M4x0.7 thread and an overall length of 40 millimeters. The 90-degree flat head seats flush with or below the surface of the workpiece, eliminating protrusion in tight assemblies. The internal hex socket drive accepts a 2.55 millimeter hex key for installation and removal. Manufactured from 12.9 grade alloy steel, this screw delivers high tensile strength suitable for demanding mechanical and industrial assemblies. The black oxide finish provides mild corrosion resistance and reduces light reflection in finished assemblies. Machinists, maintenance technicians, and mechanical assemblers are the primary installers of this fastener.

This flat socket cap screw is used in precision mechanical assemblies, tooling fixtures, machine frames, and equipment enclosures where a countersunk fastener is required. The 90-degree flat head geometry suits standard metric countersunk holes prepared to ISO 10642 or ANSI B1.13M specifications. It is commonly installed in steel, aluminum, and engineered plastic components where flush surface requirements are critical to fit, form, or function. This screw is appropriate for both original equipment manufacturing and field maintenance applications across general industrial, automation, and fabrication environments.

Key Features

• 90-degree flat head seats flush with the mating surface for low-profile, countersunk installations
• M4x0.7 metric thread with 40 millimeter overall length
• 12.9 grade alloy steel construction provides high tensile and proof load strength
• 2.55 millimeter hex socket drive for standard hex key installation
• Black oxide finish offers mild corrosion resistance and a matte appearance
• Conforms to ANSI B1.13M and ISO 10642 fastener standards

Compatibility

Designed as an OEM-style metric flat socket cap screw for countersunk hole applications conforming to ISO 10642 and ANSI B1.13M standards. Suitable for use in any assembly requiring an M4x0.7 countersunk socket screw in 12.9 grade alloy steel.

Installation Notes

Installation requires a 2.55 millimeter hex key or socket bit rated for high-torque fastening. Countersink the mating hole to the correct 90-degree angle and diameter before installation to ensure proper head seating. Degrease mating surfaces and inspect threads prior to assembly. Wear appropriate hand and eye protection when working with high-strength fasteners under load.