Holo-krome 76504 Hex Socket Cap Screw M20 X 2.50 Alloy Steel

Product Description

The HOLO-KROME 76504 is a metric hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and trade assembly work. Manufactured from alloy steel to material grade 12.9, this screw delivers the elevated tensile and proof-load strength required in demanding structural and equipment installations. The black oxide finish provides mild corrosion resistance and reduces light reflection on exposed fasteners. With a thread size of M20 x 2.50 and a fully threaded shank measuring 65 mm under the head, this screw is driven with a standard hex socket tool. It meets ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 standards.

This screw is suited for mechanical assemblies, equipment mounting, and structural connections where high clamp load and precision thread engagement are critical. Fully threaded along the 65 mm length under head, it is appropriate for through-bolt configurations and short-grip fastening scenarios. Typical installers include millwrights, pipefitters, mechanical contractors, and maintenance technicians working with industrial machinery, HVAC equipment frames, pump assemblies, and structural steel components.

Key Features

• Alloy steel construction rated to material grade 12.9 for high tensile strength
• Fully threaded shank at M20 x 2.50 thread pitch over 65 mm length under head
• Black oxide coating for mild corrosion resistance and surface protection
• Hex socket drive for positive torque engagement with standard allen-key tooling
• Meets ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 fastener standards

Compatibility

Designed as a standard DIN 912 and ISO 4762 metric hex socket cap screw suitable for any M20 x 2.50 threaded application requiring a grade 12.9 alloy steel fastener.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with metric fastener torque requirements for grade 12.9 hardware. Always verify thread engagement depth and mating material before assembly. Use a calibrated torque wrench sized for M20 fasteners to achieve proper clamp load without yielding the fastener. Inspect threads in the receiving component for damage or contamination before installation.