Holo-krome 76532 Hex Socket Cap Screw M20 X 2.50 Alloy Steel

Product Description

The HOLO-KROME 76532 is a metric hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. This screw features an M20 x 2.50 thread and a 120 mm length under head, with partial threading along the shank. It is manufactured from alloy steel to material grade 12.9, one of the highest strength classes available for metric fasteners, and is finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. Machinists, millwrights, industrial maintenance technicians, and mechanical contractors install this type of fastener where tensile loads and precise clamping force are critical.

This screw is suited for use in heavy equipment, machine tool frames, hydraulic components, jigs, fixtures, and other assemblies requiring a high-clamp-load metric fastener. The partially threaded shank allows the unthreaded portion to act as a locating or shear-load bearing surface, making it appropriate for applications where alignment precision matters alongside clamping strength. It is driven with a hex socket tool, which allows torque application in recessed or tight-clearance bolt holes. Sold individually.

Key Features

• M20 x 2.50 thread form per ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1
• Grade 12.9 alloy steel construction for maximum tensile and proof load ratings
• 120 mm length under head with partial threading for shear-load and alignment applications
• Black oxide finish for moderate corrosion resistance and reduced surface reflectivity
• Hex socket drive for high-torque installation in confined spaces
• Meets multiple international fastener standards for broad application acceptance

Compatibility

Designed as an OEM-style and replacement metric hex socket cap screw for assemblies requiring an M20 x 2.50 partially threaded grade 12.9 fastener per DIN 912 or ISO 4762 specifications.

Installation Notes

Installation should be performed by a qualified machinist, millwright, or mechanical technician familiar with metric fastener torque requirements for grade 12.9 hardware. Always consult the equipment manufacturer's torque specifications before final tightening, and use a calibrated torque wrench. De-energize, depressurize, or lock out the equipment per applicable safety procedures before servicing fastened assemblies. Do not substitute a lower-grade fastener in positions originally specified for grade 12.9 hardware.