Holo-krome 760005440 Hex Socket Cap Screw M20 X 2.50

Product Description

The HOLO-KROME 760005440 is a metric hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. The screw features an M20 x 2.50 thread profile with a 300 mm length under head and is partially threaded, allowing it to bear shear loads across unthreaded shank sections. Manufactured from alloy steel to material grade 12.9, it delivers high tensile strength suitable for demanding load-bearing connections. A black oxide coating provides moderate corrosion resistance and reduces light reflection. Licensed contractors, millwrights, and mechanical assemblers are the typical installers for fasteners of this class.

This screw is suited for heavy-duty bolted connections in manufacturing equipment, hydraulic assemblies, machine frames, and structural fixtures where a high-clamp-load metric fastener is required. The hex socket drive accepts a standard Allen or hex key, making it ideal for installations where recessed-head clearance is needed and torque must be applied precisely. Partial threading keeps the unthreaded shank within the joint interface, which is standard practice for shear-loaded joints in industrial equipment.

Key Features

• M20 x 2.50 metric thread with 300 mm length under head for deep-reach fastening
• Partially threaded shank to handle shear loads and maintain joint alignment
• Alloy steel construction at material grade 12.9 for maximum tensile and proof-load strength
• Black oxide finish for mild corrosion protection and low-glare appearance
• Hex socket drive for high-torque input in tight or recessed clearance applications
• Meets ANSI B1.13M, ISO 4762, and ISO 898-1 standards

Compatibility

Designed as a standard metric hex socket cap screw conforming to ISO 4762 and ANSI B1.13M, compatible with any M20 x 2.50 tapped hole or nut meeting the same metric thread standard in industrial and mechanical assemblies.

Installation Notes

Installation should be performed by a qualified millwright, maintenance technician, or mechanical assembler familiar with metric fastener torque requirements for grade 12.9 hardware. Always verify the tapped hole thread class and depth before driving the fastener. Use a calibrated torque wrench with the appropriate hex key bit to achieve the required clamp load without overdriving. De-energize and lock out any equipment before performing fastener replacement or assembly work on live machinery.