Holo-krome 76280 Hex Socket Cap Screw M8 X 1.25 75mm

Product Description

The HOLO-KROME 76280 is a metric hex socket cap screw engineered for high-strength fastening applications in industrial and mechanical assemblies. It features an M8 x 1.25 thread profile with a 75 mm length under head and a partially threaded shank. Manufactured from alloy steel to material grade 12.9 and finished with a black oxide coating, this fastener delivers high tensile strength along with moderate corrosion resistance. The internal hex drive accepts a standard hex key for precise torque application in confined spaces. Mechanical contractors, millwrights, and maintenance technicians install these fasteners in machinery, tooling fixtures, and structural steel connections.

This screw is suited for residential and commercial mechanical assemblies where high-load fastening is required. The partially threaded shank allows for clamping force between joined components without thread engagement in the grip length zone. Typical applications include machine frames, hydraulic component mounting, jig and fixture assembly, and any bolted joint requiring a grade 12.9 alloy steel fastener with a clean, low-reflectance black oxide finish. Sold individually with a minimum order quantity of 10 units.

Key Features

• M8 x 1.25 thread size with 75 mm length under head for deep engagement in medium-to-heavy assemblies
• Partially threaded shank provides full clamping force across the grip length
• Grade 12.9 alloy steel construction for high tensile and proof load performance
• Black oxide finish offers mild corrosion resistance and low surface reflectance
• Internal hex socket drive allows use of standard hex keys and T-handle wrenches in tight clearances
• Conforms to ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 standards

Compatibility

Designed as an OEM-style replacement or standard-stock hex socket cap screw for any M8 x 1.25 threaded bore application requiring a DIN 912 or ISO 4762 compliant fastener at grade 12.9.

Installation Notes

Installation is performed by millwrights, maintenance technicians, or mechanical contractors using a properly sized hex key or socket drive tool. Always verify the mating threaded bore is clean, undamaged, and of compatible thread class before installation. Consult the equipment manufacturer torque specification table for grade 12.9 M8 fasteners before final tightening. Avoid mixing different material grades in the same bolted joint assembly.