Metric Blue UST184214 Hex Cap Screw M8 X 1.25 X 40 Mm Gr10.9

Product Description

The METRIC BLUE UST184214 is a metric hex head cap screw designed for high-strength bolted assemblies requiring a reliable, partially threaded fastener. Manufactured from Grade 10.9 steel, this screw delivers tensile strength suited to demanding mechanical and structural applications. It features an M8 x 1.25 thread profile with a 40 mm length under head, and a 13 mm hex drive for standard wrench engagement. Conforming to ASME B18.2.3.1M, DIN 931, DIN 933, and SAE J1199, it meets widely accepted dimensional and mechanical standards. Installers and maintenance technicians working with metric-spec equipment will find this fastener a direct fit for precision-tolerance bolt patterns.

This cap screw is used in mechanical, industrial, and equipment-assembly applications where metric fasteners are specified. The partial threading allows for load distribution across the unthreaded shank, making it appropriate for through-bolt applications and joints where shank contact with the bore is intentional. It suits maintenance and repair work on machinery, automotive components, and fabricated assemblies that call for M8 metric fasteners at the 40 mm length.

Key Features

• M8 x 1.25 thread size with 40 mm length under head for precise metric fitment
• Grade 10.9 steel construction provides high tensile and proof load strength
• Partially threaded shank supports shear-loaded and through-bolt joint configurations
• 13 mm hex drive accepts standard metric wrenches and sockets
• Meets ASME B18.2.3.1M, DIN 931, DIN 933, and SAE J1199 standards

Compatibility

Designed for use in metric-spec mechanical assemblies, equipment, and fabrication applications requiring an M8 x 1.25 partially threaded hex head cap screw conforming to DIN 931, DIN 933, or ASME B18.2.3.1M dimensional standards.

Installation Notes

Installation should be performed by a qualified technician familiar with metric fastener specifications and proper torque practices. Always use a calibrated torque wrench and follow the equipment manufacturer's torque specifications for Grade 10.9 fasteners at this thread size. Ensure mating threads are clean, undamaged, and free of debris before assembly. Do not substitute a lower-grade fastener in applications engineered for Grade 10.9 hardware.