Metric Blue UST187477 Flat Socket Cap Screw M8x1.25

Product Description

The METRIC BLUE UST187477 is a flat socket cap screw engineered for precision metric fastening in demanding mechanical and structural applications. Built to DIN 7991 standards, it features an M8x1.25 thread size and a 50.00 mm overall length with full threading throughout. The 90-degree flat head sits flush with the mating surface when fully seated, and the 5.00 mm hex socket drive accepts standard hex keys for reliable torque transfer. Constructed from 12.9 grade alloy steel with a Metric Blue finish, this fastener delivers high tensile strength and resistance to surface corrosion. It is sold individually but requires a minimum order of 5 units. Mechanical assemblers, maintenance technicians, and machine builders are the typical end users.

This screw is suited for applications where a low-profile, countersunk head is required and flush-mount fastening is critical. Common use cases include machinery assembly, fixture fabrication, automotive component mounting, and general industrial metalwork where metric fastening to DIN standards is specified. The fully threaded shank provides consistent clamping force along the entire engaged length, making it appropriate for shallow boss depths and close-tolerance assemblies.

Key Features

• DIN 7991 standard flat socket cap screw with 90-degree flat head profile for flush-surface installation
• M8x1.25 metric thread size with 50.00 mm overall length, fully threaded
• 5.00 mm hex socket drive for use with standard metric hex keys or Allen drivers
• 12.9 grade alloy steel construction for high tensile and proof load strength
• Metric Blue finish applied over alloy steel base for surface protection
• Fully threaded shank maximizes thread engagement in shallow or thin material applications

Compatibility

Designed as a DIN 7991-compliant metric flat socket cap screw compatible with M8x1.25 threaded bores in machinery, fixtures, and assemblies requiring a countersunk hex socket fastener.

Installation Notes

Installation is typically performed by mechanical technicians or assemblers using a 5.00 mm hex key or Allen driver. Ensure the mating bore is properly countersunk to the correct 90-degree angle before installation. De-energize or lock out any powered equipment before fastener service per applicable OSHA lockout/tagout procedures. Do not exceed the torque capacity appropriate for 12.9 grade M8 fasteners as specified by the applicable engineering standard for the assembly.