Holo-krome 76040 Hex Socket Cap Screw M3 X 0.50 Metric

Product Description

The HOLO-KROME 76040 is a metric hex socket cap screw designed for precision fastening in mechanical assemblies, tooling fixtures, and industrial equipment. It carries an M3 x 0.50 thread and a 30 mm length under head with partial threading, manufactured from alloy steel with a black oxide finish. The material grade is 12.9, meaning high tensile strength suited to demanding clamping applications. Licensed machinists, millwrights, and maintenance technicians are the primary installers. Black oxide coating provides mild corrosion resistance and reduces light reflection in optical or precision instrument applications.

This screw is used wherever a compact, high-strength metric fastener is required in tight spaces that demand a flush or low-profile head. Typical applications include machine tool assemblies, jigs, fixtures, robotics frames, and mechanical component mounting where torque requirements exceed what a standard-grade fastener can handle. The hex socket drive allows installation with an Allen key or hex bit in confined clearance areas where a wrench cannot reach.

Key Features

• M3 x 0.50 metric thread for compatibility with standard metric tapped holes
• 30 mm length under head, partially threaded for controlled engagement depth
• Alloy steel construction at material grade 12.9 for high tensile and proof load strength
• Black oxide finish for mild corrosion resistance and reduced surface reflectivity
• Hex socket drive type for installation in limited-clearance applications
• Meets ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for metric M3 x 0.50 tapped holes conforming to DIN 912 and ISO 4762 socket head cap screw standards.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician using a calibrated hex key or hex bit driver sized for M3 socket head screws. Ensure the mating tapped hole is clean and free of debris before threading. Do not exceed the rated torque for a grade 12.9 M3 fastener as specified in the applicable engineering standard or equipment service manual. When used in critical load-bearing assemblies, follow applicable ANSI or ISO torque guidelines for the joint material.