Metric Blue UST178900 Hex Socket Cap Screw M20 X 2.50

Product Description

The METRIC BLUE UST178900 is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features an M20 x 2.50 thread specification and a length under head of 120 mm, built to DIN 912 standards from grade 12.9 alloy steel. The Metric Blue coating provides corrosion resistance and visual identification consistent with the Metric Blue product line. This fastener is installed by millwrights, industrial mechanics, and maintenance technicians wherever high-clamp-load fastening is required.

This screw is suited for heavy equipment assembly, machine tool mounting, industrial frame construction, and structural bolting where high-tensile fasteners are specified. The M20 x 2.50 thread pitch and 120 mm length under head make it appropriate for thick-section assemblies requiring partial thread engagement. It ships individually and can be ordered in single-unit quantities, making it practical for repair and replacement tasks as well as production builds.

Key Features

• Grade 12.9 alloy steel construction for maximum tensile and proof load performance
• DIN 912 standard compliance for dimensional consistency and interchangeability
• M20 x 2.50 thread size with partial threading for load-bearing joint applications
• 120 mm length under head accommodates thick-section clamping
• Metric Blue finish coating for corrosion resistance and series identification
• Hex socket (Allen) drive for high-torque installation in confined spaces

Compatibility

Designed as a DIN 912-compliant M20 x 2.50 hex socket cap screw suitable for use in any application specifying a grade 12.9 partially threaded cap screw of this thread and length.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using a calibrated torque wrench and the correct hex key or socket for the M20 drive size. Always de-energize and lock out equipment before servicing fastened assemblies. Grade 12.9 fasteners should not be substituted with lower-grade hardware, and thread engagement depth should meet engineering specifications for the joint design. Inspect mating threads for damage or contamination before installation.