Holo-krome 86050 Button Socket Cap Screw M8x1.25 35mm

Product Description

The HOLO-KROME 86050 is a metric button socket cap screw designed for applications requiring a low-profile head with high clamping strength. The screw features an M8x1.25 thread, a 35mm length under the head, and a 5mm hex socket drive. It is manufactured from Grade 12.9 alloy steel with a black oxide finish, delivering a hardness rating of 38 HRC. The button head profile measures 14.0mm in diameter and 4.4mm in height. Machinists, maintenance technicians, and industrial assembly professionals install this fastener where standard cap screws would protrude excessively into clearance-critical assemblies.

This screw is suited for use in precision mechanical assemblies, machine frames, fixtures, and equipment panels where a flush or near-flush fastener is required. The fully threaded shank and right-hand thread direction make it compatible with standard metric tapped holes in steel, aluminum, and cast components. The black oxide finish provides moderate corrosion resistance in dry indoor environments. It is commonly installed in manufacturing, fabrication, and maintenance-of-equipment applications across industrial and light commercial settings.

Key Features

• Grade 12.9 alloy steel construction with 38 HRC hardness for high-strength fastening
• Button head profile - 14.0mm head diameter, 4.4mm head height - minimizes protrusion in tight assemblies
• 5mm hex socket drive accepts standard hex keys and socket drivers
• Black oxide finish provides a uniform appearance and moderate corrosion resistance
• Fully threaded M8x1.25 right-hand shank, 35mm length under head
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in standard metric M8x1.25 tapped holes conforming to 4G or 6G thread fit classes per metric thread standards.

Installation Notes

Installation requires a 5mm hex key or hex socket driver. Torque to the fastener manufacturer's published specifications for Grade 12.9 M8 screws using a calibrated torque wrench. Ensure mating threads are clean and free of debris before installation. Thread-locking compounds should be selected based on service conditions and the base material being fastened.