Metric Blue UST179776 Socket Cap Screw M8x1.25 90mm

Product Description

The METRIC BLUE UST179776 is a partially threaded socket cap screw designed for high-strength fastening applications. It features an M8 x 1.25 thread size, a 90 mm length under head, and a hex socket drive for use with standard Allen keys or hex bit drivers. Manufactured from alloy steel to material grade 12.9, this screw delivers high tensile strength suited for demanding mechanical assemblies. The metric blue finish provides corrosion protection and visual identification. This fastener conforms to DIN 912 and ISO 4762 standards and is suited for precision mechanical, industrial, and OEM assembly work performed by machinists, millwrights, and maintenance technicians.

This socket cap screw is used in general industrial equipment, machinery frames, hydraulic assemblies, and structural mechanical joints where high clamp load and a low-profile head are required. The 12.9 material grade makes it appropriate for high-stress applications where standard grade fasteners are insufficient. It installs in metric-tapped through-holes or blind holes requiring an M8 x 1.25 thread pitch. Both original equipment assembly and field repair applications are common use cases.

Key Features

• M8 x 1.25 thread size with 90 mm length under head
• Partially threaded shank for precise clamping and shear load applications
• Grade 12.9 alloy steel construction for high tensile and proof load strength
• Hex socket drive compatible with standard Allen keys and hex bit drivers
• Metric blue finish for corrosion resistance and grade identification
• Conforms to DIN 912 and ISO 4762 fastener standards

Compatibility

Designed as a standard DIN 912 and ISO 4762 metric socket cap screw for any M8 x 1.25 threaded application requiring a grade 12.9 partially threaded fastener.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or assembly personnel using a calibrated torque wrench with the appropriate hex key or socket bit. De-energize and depressurize any equipment before disassembling fastened joints. Grade 12.9 fasteners require torque values specified by the equipment manufacturer or engineering drawings - do not substitute a lower-grade screw in a 12.9-rated joint. Thread engagement depth should meet minimum requirements per applicable fastener standards.