Holo-krome 86013 Button Socket Cap Screw M4x0.70 16mm

Product Description

The HOLO-KROME 86013 is a metric button socket cap screw designed for applications requiring a low-profile head and high-strength clamping force. It features an M4x0.70 thread with a 16mm length under head, driven by a 2.55mm hex socket. Manufactured from Grade 12.9 alloy steel with a black oxide finish, it delivers a hardness of 38 HRC and meets ANSI/ASME B18.3 and ASTM F835 standards. The button head profile reduces snag risk in tight clearance assemblies. Right-hand thread direction and a 4G thread fit class make it suitable for precision fastening tasks where controlled thread engagement is required.

This screw is used in mechanical assemblies, machine guarding, equipment panels, and fixture work where a flush or near-flush fastener head is needed. The black oxide finish provides mild corrosion resistance suitable for indoor and controlled-environment applications. It is commonly installed by millwrights, maintenance technicians, and mechanical contractors working on light machinery, enclosures, and fabricated metal assemblies. The 4G and 6G thread fit classes allow use with standard metric tapped holes in steel, aluminum, and similar substrates.

Key Features

• Grade 12.9 alloy steel construction with 38 HRC hardness for high-strength fastening
• M4x0.70 metric thread with right-hand direction and 4G/6G thread fit class
• 2.55mm hex socket drive for compact tool access in tight spaces
• Low-profile button head at 7.6mm diameter and 2.2mm height reduces clearance interference
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard metric replacement or new-installation fastener for M4x0.70 tapped holes conforming to metric thread standards in steel, aluminum, and similar materials.

Installation Notes

Installation requires a calibrated hex socket driver or Allen key sized to 2.55mm. Always ensure the receiving tapped hole is clean and free of debris before threading. De-energize or lock out any equipment before fastener replacement on live machinery per applicable safety procedures. Do not exceed the recommended seating torque for Grade 12.9 M4 fasteners as specified by the equipment manufacturer or applicable ASME standards.