Holo-krome 76279 M8 X 1.25 Hex Socket Cap Screw 80mm

Product Description

The HOLO-KROME 76279 is a metric hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and equipment assembly work. It features an M8 x 1.25 thread size with an 80 mm length under head and is partially threaded, making it suitable for clamping and through-bolt applications where thread engagement must be controlled. Manufactured from alloy steel to material grade 12.9, it delivers high tensile and proof-load capacity. The black oxide finish provides moderate corrosion resistance and a low-reflectivity appearance. This fastener is driven with a standard hex socket and is installed by mechanical and industrial maintenance technicians.

This screw is suited for use in precision machinery, tooling fixtures, industrial equipment, and structural assemblies where a grade 12.9 metric fastener is specified. Partial threading allows the unthreaded shank to bear shear loads, which is a common design requirement in jig, fixture, and machine-tool applications. It conforms to ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 standards, making it interchangeable with similarly rated metric socket cap screws across global OEM and MRO specifications.

Key Features

• M8 x 1.25 thread with 80 mm length under head for deep-reach fastening
• Partially threaded shank for shear-load bearing in fixture and machinery assemblies
• Grade 12.9 alloy steel construction for maximum tensile strength in the metric fastener class
• Black oxide coating for moderate corrosion resistance and low-glare finish
• Hex socket drive for high-torque installation in confined spaces
• Conforms to ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 standards

Compatibility

Designed as an OEM-style and MRO replacement for grade 12.9 metric hex socket cap screws conforming to DIN 912 and ISO 4762 specifications in M8 x 1.25 thread size.

Installation Notes

Installation is performed by mechanical technicians and millwrights using a calibrated hex socket or Allen key of the correct metric size. Always de-energize and lock out equipment before accessing fastener locations on live machinery. Do not substitute a lower-grade fastener in any application specifying grade 12.9. Follow applicable ASME or OEM torque specifications for the joint material and thread size when tightening.