Holo-krome 76524 Hex Socket Cap Screw M20 X 2.50 Alloy Steel

Product Description

The HOLO-KROME 76524 is a metric hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and trade environments. It features an M20 x 2.50 thread size with a 100 mm length under head and is partially threaded, making it suitable for applications where clamping force must be concentrated at the joint. The fastener is manufactured from alloy steel to material grade 12.9, the highest common metric bolt grade, and is finished with a black oxide coating that provides mild corrosion resistance and reduces light reflection. This screw is driven with a hex socket tool and is installed by mechanical maintenance technicians, millwrights, and equipment assemblers.

This cap screw is used across a wide range of industrial and mechanical applications where high tensile and proof loads are required. Partial threading allows for precise alignment and load distribution in bolted joints on machinery, structural assemblies, tooling, and equipment frames. The M20 x 2.50 thread profile and 12.9 grade rating make it appropriate for demanding service conditions where standard-grade fasteners would be undersized or insufficient.

Key Features

• M20 x 2.50 metric thread size for high-load bolted connections
• 100 mm length under head, partially threaded for precise joint clamping
• Alloy steel construction, material grade 12.9 for maximum tensile strength
• Black oxide finish for mild corrosion resistance and reduced reflectivity
• Hex socket drive for high-torque installation with standard Allen tooling
• Meets ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-fit metric hex socket cap screw for applications specifying M20 x 2.50 DIN 912 or ISO 4762 socket head cap screws in grade 12.9 alloy steel.

Installation Notes

Installation should be performed by a qualified millwright, mechanical technician, or assembler using a calibrated torque wrench and the appropriate metric hex socket key. De-energize and lock out all equipment before fastener installation or replacement per applicable OSHA lockout-tagout procedures. Do not substitute a lower-grade fastener in any joint designed for grade 12.9 hardware. Inspect threads and mating surfaces for damage or contamination before assembly.