Metric Blue UST184045 Flat Socket Cap Screw M6x1 40mm

Product Description

The METRIC BLUE UST184045 is a flat socket cap screw engineered for high-strength metric fastening applications. It features an M6x1 thread size, a 40 mm overall length, and a fully threaded shank. The 90-degree flat head seats flush with the mating surface, eliminating protrusion in countersunk assemblies. Built from 12.9 grade alloy steel, this fastener delivers tensile strength suitable for precision mechanical, tooling, and industrial applications. The Metric Blue finish provides a corrosion-resistant coating with consistent visual identification. Drive engagement is through a 4.00 mm hex socket, compatible with standard metric Allen keys and socket drivers.

This screw is suited for applications requiring a flush, low-profile head profile in metal-to-metal assemblies. Typical installation scenarios include machine frames, jigs, fixtures, tooling plates, and mechanical subassemblies where high clamp load and a countersunk seating surface are required. The fully threaded configuration maximizes thread engagement across the full length, making it appropriate for short-grip or thin-stack assemblies. Minimum order quantity is 10 pieces per order.

Key Features

• M6x1 metric thread with fully threaded shank for maximum engagement
• 90-degree flat head seats flush in standard countersunk holes per DIN 7991
• 12.9 alloy steel construction for high tensile and proof load capacity
• 4.00 mm hex socket drive for use with standard metric Allen keys
• Metric Blue finish for corrosion resistance and visual grade identification
• 40 mm overall length measurement for consistent fitment specification

Compatibility

Designed as a DIN 7991 standard metric flat socket cap screw. Compatible with any countersunk M6 clearance or tapped hole machined to metric DIN specifications.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a calibrated metric hex key or Allen socket driver sized at 4.00 mm. Verify that the mating countersink is machined to the correct 90-degree included angle before seating the fastener. Torque to fastener manufacturer specifications for the appropriate clamp load at grade 12.9. Never reuse fasteners that have been overtorqued or show signs of galling on the thread flanks.