Metric Blue UST176321 Socket Cap Screw M20 X 2.5 150mm

Product Description

The METRIC BLUE UST176321 is an alloy steel socket cap screw designed for high-strength bolted assemblies in mechanical, industrial, and structural applications. It features an M20 x 2.5 thread profile with a 150 mm length under head and is partially threaded along the shank. The hex socket drive accepts a standard Allen key or hex bit driver for installation in confined spaces where a wrench cannot reach. At material grade 12.9, this fastener delivers high tensile strength and is suited for applications where joint integrity under dynamic or heavy static loads is critical. The Metric Blue finish provides a distinctive surface coating consistent with the METRIC BLUE product line.

This socket cap screw is used in general mechanical assembly, industrial machinery, tooling fixtures, and structural bolted connections where metric fasteners are specified. The M20 x 2.5 thread size and 150 mm shank length make it appropriate for thicker material stacks or deep clearance holes requiring a long-reach fastener. It conforms to DIN 912 and ISO 898 fastener standards, making it suitable for applications requiring documented fastener standards compliance. Installation is performed by maintenance technicians, millwrights, and mechanical assemblers working with metric hardware.

Key Features

• M20 x 2.5 thread profile - standard metric coarse pitch for heavy-duty bolted joints
• 150 mm length under head for deep engagement in thick material sections
• Partially threaded shank for controlled clamp load and shear load capability
• Grade 12.9 alloy steel for high tensile and proof load ratings
• Hex socket drive for installation in restricted-access locations
• Conforms to DIN 912 and ISO 898 fastener standards

Compatibility

Designed as an OEM-compatible metric socket cap screw for use in any application requiring a DIN 912-compliant M20 x 2.5 partially threaded fastener with a grade 12.9 alloy steel construction.

Installation Notes

Installation should be performed by qualified mechanical assemblers or maintenance technicians using a calibrated torque wrench and the correct hex key or hex bit sized for the M20 socket cap head. Ensure mating threads are clean and free of debris before assembly. Apply thread lubricant or thread-locking compound only where specified by the equipment manufacturer or engineering drawing. Follow applicable ASME or ISO standards for bolt torque and preload when specific values are not provided by the OEM.