Kinmar Removable by Hafren Security Fasteners

Manufacturer Claim

Unique Hafren segment shaped bolt. The ultimate two-way patented security bolt- extra resilient to attack.

This patented removable nut requires a matching driver socket for installation and removal. This cost-effective bolt has a smooth aesthetically pleasing design which makes it an extremely versatile bolt.

Also stocked in; Geomet®
Other materials and finishes available to order, subject to minimum order quantities

Kinmar Removable by Hafren Security Fasteners

What We Thought

The Kinmar® Removable fastener offers a flexible tamper-resistant option for low-risk applications, but its design leaves critical vulnerabilities. The flat top makes it easier to grip with locking pliers or attack with rotary tools, and although the manufacturer claims the driver socket is restricted, it can be found online for around $170—undermining the intended access control. Its use is best limited to low-value or controlled environments where convenience outweighs high security.

Good For

Low-Value Theft Prevention
Controlled Access Environments

Not Good For

High-Value Theft Protection
High-Frequency Removal
Large-Scale Projects
Applications Requiring Sizes Outside M6–M12

See Why

Product Facts

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.

Feature: Value
Driver Availability: Restricted: Specialist tooling, available only from Hafren approved distributors.
Maximum Torque (MFR Claim): Not specified; high torque for removable security.
Minimum Quantity: Not specified; likely moderate (e.g., 100 pieces).
Average Break-In Time: High: Requires specialist tooling, resists standard bits.
Cost Per Fastener: $2.04 - $6.95
Samples Available: Not specified; likely available for bulk orders.
Keyway Type: Patented two-indent keyway, resists standard bits.
Tool Control: Controlled: Specialist tooling restricted to approved distributors.
Head Style Options: Button, countersunk.
Material Options: Steel, stainless steel; A2, A4 options.
Reusability: Reusable with Kinmar® tooling; designed for secure removal.
Tamper Resistance: High: Patented keyway enhances tamper resistance.
Tool Compatibility: Requires Kinmar® specialist tooling; incompatible with standard bits.
Installation Method: Manual or power-driven with Kinmar® tooling.
Visual Deterrence Level: Moderate: Two-indent design signals security but less unique.
Removal Risk if Tool Leaks: Moderate: Restricted tooling reduces risk, but not bespoke.
Lead Time to Purchase: Not specified; likely 1–4 weeks. Contact Hafren.

About The Manufacturer

Hafren 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.

Where to Buy

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Not Available in stores.
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