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The METRIC BLUE UST184138 is a flat socket cap screw designed for applications requiring a low-profile, flush-mounted fastener. Built from 12.9 grade alloy steel with a metric blue finish, this screw delivers high tensile strength in demanding mechanical assemblies. It features an M12x1.75 thread size, an overall length of 50.00 mm, and a fully threaded shank. The 90-degree flat head seats flush with the mating surface, reducing protrusions in tight clearance environments. Drive engagement is through an 8.00 mm hex socket, conforming to DIN 7991. This fastener is installed by mechanical technicians, maintenance professionals, and trade contractors working on precision equipment, machinery, and structural assemblies.
This screw is suited for metric fastening applications in industrial machinery, mechanical equipment, and fabricated assemblies where a countersunk, flush-fitting connection is required. The 12.9 material grade indicates an ultra-high-strength alloy steel fastener capable of handling significant clamp loads. The metric blue finish provides a distinctive appearance and mild corrosion resistance. It is fully threaded along its entire 50.00 mm length, maximizing thread engagement across the full grip range.
Designed as an OEM-style metric fastener for use in mechanical assemblies, equipment, and machinery requiring a DIN 7991 compliant M12x1.75 countersunk socket cap screw.
Installation should be performed by a qualified mechanic or trade professional using a calibrated hex socket driver. Always verify thread engagement and hole preparation before driving to final torque. Do not overtighten 12.9 grade fasteners beyond specified design torque, as this can compromise thread integrity. Follow applicable machinery and equipment manufacturer guidelines for proper seating of flat-head fasteners in countersunk holes.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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