Metric Blue UST184059 Flat Socket Cap Screw M8x1.25

Product Description

The METRIC BLUE UST184059 is a flat socket cap screw designed for applications requiring a low-profile, flush or countersunk fastener. Built to DIN 7991 standard, it features an M8x1.25 thread and a 5.00 mm hex socket drive. The screw is fully threaded along its 30.00 mm overall length and manufactured from grade 12.9 alloy steel, providing high tensile strength suited to demanding mechanical assemblies. The metric blue finish offers a degree of corrosion resistance while serving as a visual identifier for metric-dimensioned fasteners. This fastener is installed by machinists, millwrights, and mechanical contractors working on precision assemblies.

This flat socket cap screw is used in applications where a standard hex socket cap head would protrude above the mating surface and interfere with adjacent components or movement. The 90-degree flat head seats flush into a countersunk hole, making it well suited for machine guards, frame assemblies, brackets, and fixtures where a smooth surface profile is required. Its fully threaded shank allows engagement along the entire length, which is advantageous in shallow or through-hole applications.

Key Features

• DIN 7991 standard flat socket cap screw for consistent dimensional accuracy
• Grade 12.9 alloy steel construction for high tensile and shear strength
• M8x1.25 metric thread with full threading along the 30.00 mm overall length
• 5.00 mm hex socket drive for standard Allen key or hex bit installation
• 90-degree flat head profile for flush, countersunk seating
• Metric blue finish for corrosion resistance and metric identification

Compatibility

Designed as a DIN 7991 standard flat socket cap screw in M8x1.25 metric thread, compatible with countersunk holes machined to DIN 7991 specifications.

Installation Notes

Installation requires a 5.00 mm hex key or hex socket bit. Countersink the mating hole to the appropriate 90-degree angle per DIN 7991 specifications before installation. Ensure the mating thread is clean and free of debris before driving. Grade 12.9 fasteners should not be substituted with lower-grade hardware in high-load or safety-critical joints without engineering review.