Metric Blue UST187471 Flat Socket Cap Screw M8x1.25

Product Description

The METRIC BLUE UST187471 is a flat socket cap screw designed for high-strength fastening applications requiring a flush or countersunk head profile. Built to DIN 7991 standards, it features an M8x1.25 thread size and a 5.00 mm hex socket drive, driven by a standard hex key or Allen wrench. The screw is fully threaded along its 20.00 mm overall length and manufactured from 12.9 grade alloy steel, which delivers tensile strength suitable for demanding mechanical assemblies. The Metric Blue finish provides a distinct identification coating consistent with the Metric Blue product line. Machinists, maintenance technicians, and industrial assembly professionals are the primary installers of this fastener.

This screw is suited for metric fastening applications in precision machinery, automotive assemblies, equipment manufacturing, and industrial fabrication where a low-profile countersunk head is required. The 90-degree flat head seats flush with the workpiece surface, making it appropriate for applications where clearance above the joint is limited. Its full threading ensures maximum thread engagement across the entire shank length, which is important in thin material or blind-hole applications.

Key Features

• DIN 7991 standard flat socket cap screw with 90-degree countersunk head profile
• M8x1.25 metric thread size, fully threaded over 20.00 mm overall length
• 12.9 grade alloy steel construction for high tensile strength in demanding assemblies
• 5.00 mm hex socket drive compatible with standard metric Allen keys
• Metric Blue finish for quick visual identification as a metric-grade fastener
• Flush-seating head eliminates protrusion above the mating surface

Compatibility

Designed as an OEM-style metric replacement flat socket cap screw conforming to DIN 7991, suitable for any M8x1.25 threaded application requiring a countersunk hex socket fastener.

Installation Notes

Installation should be performed by a qualified machinist or mechanical technician using a calibrated 5.00 mm hex key or torque wrench with the appropriate bit. Ensure the receiving hole is properly countersunk to 90 degrees to achieve full head seating before driving the fastener. Do not exceed the rated torque specification for 12.9 grade M8 fasteners as defined by the applicable engineering standard for the assembly. Inspect threads in the mating part for damage or contamination before installation.