Holo-krome 87212 Flat Socket Cap Screw M16x2 40mm

Product Description

The HOLO-KROME 87212 is a metric flat socket cap screw engineered for applications requiring a flush or countersunk fastener profile. Built from grade 12.9 alloy steel with a black oxide finish, it delivers high tensile strength and moderate corrosion resistance in a compact, low-profile head. The 90-degree flat head seats cleanly into countersunk holes, and the 10 mm hex socket drive accepts standard hex keys for controlled torque application. At M16x2 thread size with a 40 mm overall length and full threading, this screw is suited for structural and mechanical assemblies where a conventional cap screw head would protrude unacceptably. Machinists, millwrights, and industrial maintenance technicians are the primary installers.

This screw is used in precision mechanical assemblies, machine frames, fixtures, and industrial equipment where a flush fastener surface is required. The M16x2 thread and grade 12.9 material make it appropriate for high-load, high-stress connections in metal-to-metal joints. The black oxide finish provides a non-reflective surface and light lubricity during installation. It is fully threaded along its 40 mm body length, making it effective in through-hole and blind-hole applications where maximum thread engagement is needed.

Key Features

• Grade 12.9 alloy steel construction for high tensile and proof load ratings
• 90-degree flat head profile for flush countersunk installation
• 10 mm hex socket drive for positive torque engagement with standard hex keys
• Black oxide finish for low-reflectance surface and light corrosion protection
• Fully threaded body along the entire 40 mm length for maximum thread engagement
• Conforms to ANSI B1.13M and ISO 10642 fastener standards

Compatibility

Designed as a metric countersunk socket cap screw conforming to ISO 10642 and ANSI B1.13M, suitable for standard M16x2 threaded holes in metal assemblies requiring a flush or countersunk fastener seating surface.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 10 mm hex key or socket driver. Ensure the mating countersink angle matches the 90-degree head geometry before installation to achieve full head seating. Verify thread class compatibility with the tapped hole prior to assembly; this screw carries a 4G thread fit class per metric standards. De-energize, lock out, and tag out any machinery before servicing fasteners in live equipment.