Metric Blue UST179774 Socket Cap Screw M8 X 1.25

Product Description

The METRIC BLUE UST179774 is a metric socket cap screw designed for precision fastening applications that demand high clamping force and a low-profile head. This screw features an M8 x 1.25 thread with a 55 mm length under head and is partially threaded, making it well suited for through-bolt applications where full thread engagement to the head is not required. The alloy steel construction carries a material grade of 12.9, indicating a high-tensile fastener capable of handling demanding mechanical loads. A Metric Blue finish provides a base level of corrosion resistance while identifying the part as metric-dimensioned. The hex socket drive accepts a standard hex key for installation and torquing in tight or recessed access situations.

This screw is used in industrial, mechanical, and general manufacturing assemblies where metric fasteners to DIN 912 or ISO 4762 standards are specified. Applications include machine frames, gearboxes, hydraulic manifolds, fixtures, and structural brackets. It is sold individually at a minimum order quantity of 100 pieces, making it appropriate for production shops, maintenance operations, and fleet service environments that consume fasteners in volume. Licensed mechanics, millwrights, and maintenance technicians are the typical installers.

Key Features

• M8 x 1.25 thread with 55 mm length under head for deep-bolt applications
• Grade 12.9 alloy steel construction provides high tensile and yield strength
• Partially threaded shank supports accurate alignment and shear loading
• Hex socket drive allows torquing in confined spaces with a standard hex key
• Metric Blue finish aids corrosion resistance and confirms metric sizing at a glance
• Conforms to DIN 912 and ISO 4762 fastener standards

Compatibility

Designed as a DIN 912 and ISO 4762 compliant M8 x 1.25 socket cap screw suitable for any metric-threaded M8 application specifying a Grade 12.9 alloy steel fastener with a 55 mm length under head.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with metric fastener torque specifications for Grade 12.9 hardware. Always verify the mating thread is clean and undamaged before installation. Use a correctly sized hex key or hex socket bit to prevent drive rounding. Follow the equipment manufacturer's torque specification for M8 Grade 12.9 fasteners; do not rely on generic values unless the assembly documentation specifies them.