

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The HOLO-KROME 86031 is a metric button socket cap screw designed for applications requiring a low-profile head with high clamping strength. It features an M6x1.00 thread and a 16mm length under the head, with a hex socket drive sized at 4mm for installation with a standard hex key. Manufactured from Grade 12.9 alloy steel with a black oxide finish, this fastener delivers high tensile strength and moderate corrosion resistance in a compact form factor. It is fully threaded and carries a thread fit class of 4G and 6G, meeting ANSI/ASME B18.3 and ASTM F835 standards. Licensed trades and industrial maintenance technicians rely on this screw where flush or recessed fastening is required.
This button head cap screw is suited for light to medium mechanical assemblies, machine housings, brackets, and equipment panels where a smooth, rounded head profile is preferred over a standard hex cap or flat-head fastener. The black oxide finish makes it a common choice in industrial, automation, and general fabrication environments. Its metric thread standard makes it appropriate for equipment built to ISO or metric specifications. This part is sold individually but requires a minimum order quantity of 100 units.
Designed as a metric button socket cap screw replacement or new-installation fastener for mechanical assemblies requiring an M6x1.00 thread with a 16mm length under the head and a 4mm hex socket drive.
Installation should be performed by a qualified mechanic or maintenance technician using a calibrated 4mm hex key or Allen driver. Ensure mating threads are clean and free of debris before installation. Do not exceed the torque rating specified by the assembly manufacturer for Grade 12.9 M6 fasteners. Thread locking compounds may be applied at the installer's discretion based on vibration requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!