Security Fastener
Our Thoughts
Good For
Not Good For
Driver Availability
Maximum Torque (MFG Claim)
Minimum Quantity
Average Break-In Time
Cost Per Fastener
Samples Available
Keyway Type
Tool Control
Head Style Options
Material Options
Reusability
Tamper Resistance
Tool Compatibility
Installation Method
Visual Deterrence Level
Removal Risk if Tool Leaks
Lead Time to Purchase
Where to Buy
Kinmar Permanent by Hafren Security Fasteners
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.
Kinmar Permanent
- Permanent Fixtures
- Low-Maintenance Installations
- Visual Deterrence
Kinmar Permanent
- Applications Requiring Maintenance
- High-Tool Exposure Environments
- Resistance to Physical Destruction
Kinmar Permanent
None: One-way design, no driver for removal.
Kinmar Permanent
Not specified; high torque before shearing.
Kinmar Permanent
Not specified; likely moderate (e.g., 100 pieces).
Kinmar Permanent
Extremely high: Permanent, resists all removal attempts.
Kinmar Permanent
$1.62 - $5.35
Kinmar Permanent
Not specified; likely available for bulk orders.
Kinmar Permanent
One-way keyway, shears after installation.
Kinmar Permanent
None: Permanent design, no removal tools.
Kinmar Permanent
Button.
Kinmar Permanent
Steel, stainless steel; A2, A4 options.
Kinmar Permanent
Non-reusable; permanent installation.
Kinmar Permanent
Extremely high: One-way design prevents removal.
Kinmar Permanent
No tools for removal; one-way design.
Kinmar Permanent
Manual or power-driven; shears after installation.
Kinmar Permanent
High: One-way design signals permanence.
Kinmar Permanent
None: No removal tools exist.
Kinmar Permanent
Not specified; likely 1–4 weeks.
Kinmar Permanent
Lock-Out by Tanner
Lock-Out® screws offer a significant step up from standard tamper-resistant fasteners, featuring a patented oval center pin drive and high torque resistance. The smooth, button-head profile is also a good deterrent against gripping tools like locking pliers. However, the limited number of unique drive patterns may reduce their effectiveness in high-risk applications or against targeted threats.
Lock-Out
- Shared or Commercial Use
- Moderate Tamper Resistance
Lock-Out
- High-Security Applications Demanding Unique Keyways
- Installations Prone to Physical Tampering
- DIY Projects or Immediate Availability Needs
Lock-Out
Custom One of a Kind Drives Available
Lock-Out
Not specified; likely moderate, similar to standard Torx-Pin or Hex-Pin.
Lock-Out
Not specified; likely low (e.g., 100 pieces) for stock items.
Lock-Out
Not specified; likely high due to proprietary keyway.
Lock-Out
Not specified.
Lock-Out
Not specified; likely available for bulk orders.
Lock-Out
Unique oval shape with fins and a center pin.
Lock-Out
Controlled: limited the availability to only registered & licensed users.
Lock-Out
Socket, Flat, Button
Lock-Out
Stainless Steel
Lock-Out
Reusable with matching bit; depends on drive type.
Lock-Out
High: Complex keyway resists standard tools, but less data on advanced attacks.
Lock-Out
Requires proprietary driver; incompatible with standard tools.
Lock-Out
Manual or power-driven with proprietary driver.
Lock-Out
High: Unique design signals advanced security.
Lock-Out
Low: Controlled bit distribution reduces risk.
Lock-Out
Not specified; likely stock items ship quickly.
Lock-Out
