Metric Blue UST184021 Flat Socket Cap Screw M5x0.8

Product Description

The METRIC BLUE UST184021 is a flat socket cap screw manufactured to DIN 7991 standard in 12.9 grade alloy steel with a metric blue finish. It features a 90-degree flat head driven by a 3.00 mm hex socket and carries an M5x0.8 thread with an overall length of 16.00 mm. The screw is fully threaded along its entire shank. Grade 12.9 alloy steel delivers high tensile strength, making this fastener well suited to precision mechanical assemblies, tooling fixtures, and close-tolerance joints where a flush or countersunk head profile is required. Installation is typically performed by mechanical technicians and maintenance professionals working with metric hardware.

This screw is designed for metric-standard assemblies requiring a countersunk, flush-mount fastener with high clamping force. The flat head profile allows the fastener to sit flush with or below the mating surface, making it appropriate for machine frames, jigs, brackets, and fabricated assemblies where protruding fastener heads would interfere with function or clearance. The metric blue finish provides a degree of corrosion resistance suitable for general industrial environments. Fasteners of this type are sold in minimum order quantities and are commonly stocked by maintenance, repair, and operations departments as well as production assembly operations.

Key Features

• Grade 12.9 alloy steel construction for high tensile and proof load strength
• 90-degree flat head profile for flush or countersunk installations
• 3.00 mm hex socket drive for precise torque application with standard hex keys
• Fully threaded shank along the entire 16.00 mm overall length
• Metric blue finish for corrosion resistance in general industrial use
• Conforms to DIN 7991 fastener standard for consistent dimensional accuracy

Compatibility

Designed as a DIN 7991 metric flat socket cap screw for use in M5x0.8 threaded holes requiring a countersunk head profile in metric-standard assemblies.

Installation Notes

Installation requires a 3.00 mm hex key or driver bit rated for high-strength fasteners. Always ensure the mating countersunk hole is machined to the correct 90-degree angle to match the head geometry before driving the screw. Verify thread engagement depth meets applicable engineering specifications before applying final torque. Use appropriate personal protective equipment and follow facility safety procedures when working with high-strength fasteners in pressurized or load-bearing assemblies.