This patented permanent bolt requires a matching driver socket for installation giving you guaranteed torque levels and can be re-torqued if required. Not governed by shear point and leaving no unplated surfaces, it leaves a clean smart finish.
The Kinmar Permanent screw is a true one-way fastener designed for permanent installations where no future access is needed. Its unique shape makes unauthorized removal extremely difficult without specialized tooling or destruction. However, its broad, flat top offers limited resistance to physical attacks like grinding or gripping tools. The overall security relies more on deterrence than invulnerability.
We compiled these "product facts" using publicly available information, expert analysis, and reasonable assumptions where data was incomplete. Some details (like pricing, torque specs, and break-in times) aren’t always disclosed, so we’ve filled in the gaps as accurately as possible.
For verified specs or specific use-case guidance, we recommend reaching out directly to the manufacturer.
All set to buy the Kinmar Permanent by Hafren Security Fasteners? No worries, we are here to sort this out for you.
Not Available in stores.
Order online.
We are manufacturers & wholesalers of fasteners... but not just any, fasteners we manufacture and supply security & tamper resistant fasteners; special headed screws, nuts & bolts which are either permanently fixed, or removable only by using a matching driver tool. We stock the widest range of security fasteners available; if we don’t have what you need we’ll make it just the way you want, At Hafren we are able to offer bespoke made to measure security fasteners.