Holo-krome 76388 Hex Socket Cap Screw M12 X 1.75 Alloy Steel

Product Description

The HOLO-KROME 76388 is a metric hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and trade assemblies. It features an M12 x 1.75 thread profile with a 60 mm length under head and partial threading along the shank. Manufactured from alloy steel with a black oxide coating, this fastener meets material grade 12.9 — the highest standard strength class for metric hex socket cap screws — making it suitable for demanding clamping and structural bolting work. The internal hex drive accepts a standard hex key for installation in confined or recessed spaces where a wrench cannot access the fastener head.

This screw is used across a broad range of mechanical and industrial applications where high tensile strength and precise torque retention are required. Typical install scenarios include machine frames, hydraulic component mounting, gearbox covers, and equipment assemblies. The black oxide finish provides mild corrosion resistance and reduces surface reflectivity. Installation is performed by mechanical contractors, millwrights, and maintenance technicians. Partial threading along the shank provides shear-load capacity and alignment precision in through-bolted joints.

Key Features

• M12 x 1.75 thread size with 60 mm length under head
• Partially threaded shank for improved shear resistance in structural joints
• Alloy steel construction at material grade 12.9 for maximum tensile strength
• Black oxide coating for mild corrosion resistance and low-reflectance finish
• Internal hex drive for installation in tight or recessed locations
• Compliant with ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 standards

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for applications requiring M12 x 1.75 metric thread fasteners per DIN 912 and ISO 4762 specifications.

Installation Notes

Installation is performed by qualified mechanical technicians or millwrights using a calibrated torque wrench and the appropriate metric hex key. De-energize and lock out all equipment before servicing any fastened assembly. Grade 12.9 fasteners should not be substituted with lower-grade hardware in structural or high-load joints. Follow applicable ASME or equipment manufacturer torque guidelines for M12 fasteners in the specific joint material.