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
PENTA-PLUS by Bryce Fastener
Penta-Plus™ screws offer a robust tamper-resistant solution with a proprietary pentagon drive designed to resist standard tamper-resistant bits. The low-profile button head design deters gripping tools like locking pliers, and the optional Raptor™ Claw feature enhances torque resistance by embedding into the substrate. While the drive pattern is proprietary and bits are controlled by Bryce Fastener, the lack of unique keyways per customer may limit their suitability for applications requiring the highest level of security.
PENTA-PLUS
- Commercial Installations
- Municipal Infrastructure
- Situations Requiring Enhanced Tamper Resistance
PENTA-PLUS
- High-Security Applications Requiring Unique Keyways
- Installations Demanding Maximum Tamper-Proofing
- DIY Projects or Immediate Availability Needs
PENTA-PLUS
Restricted: Proprietary Penta-Plus™ bits, only available to Bryce customers, controlled via database.
PENTA-PLUS
132 in/lbs for ¼-20x1. Raptor™ head adds 20% more torque.
PENTA-PLUS
2,500 piece minimum, smaller minimum for large bolts.
PENTA-PLUS
Very high: Resists Torx-Pin, Hex-Pin; requires proprietary bit.
PENTA-PLUS
$0.50 - $15.00. Varies by size, quantity, and material.
PENTA-PLUS
Not stated; likely available for custom orders.
PENTA-PLUS
Pentagon-based, resists standard tamper-proof bits.
PENTA-PLUS
Strict: Bits exclusive to Bryce customers, controlled distribution.
PENTA-PLUS
Button, flat, socket, set screws; customizable with Raptor™ head.
PENTA-PLUS
302 and 316 stainless steel. 8740 Alloy, heat-treated alloys and custom coatings.
PENTA-PLUS
Reusable with Penta-Plus™ bit; high torque maintains integrity.
PENTA-PLUS
Very high: Pentagon design repels standard tools.
PENTA-PLUS
Requires Penta-Plus™ bit; incompatible with standard bits.
PENTA-PLUS
Power-driven or manual with Penta-Plus™ bit.
PENTA-PLUS
High: Pentagon design signals advanced security.
PENTA-PLUS
Low: Controlled bit distribution reduces risk.
PENTA-PLUS
4-6 weeks, stock items faster.
PENTA-PLUS
