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
One-Way
This classic one-way design installs with a standard flathead but resists removal by camming out in reverse. It's low-cost, widely available, and simple to install—but also easy to defeat with pliers, extractor tools, or modified drivers. While it provides basic deterrence, it’s not suitable where determined tampering is a concern.
One-Way
- Low-Cost Deterrence
- Indoor Fixtures
- Short-Term Security
One-Way
- High-Security Installations
- Outdoor or Public Exposure
- Resistance to Basic Tools
One-Way
Widely available: One-way removal tools accessible to public.
One-Way
~85 in/lbs for 1/4-20x1
One-Way
Not specified; likely low (e.g., 100 pieces).
One-Way
Moderate: Removal possible with specialized tools.
One-Way
As low as $0.04
One-Way
Not Likely.
One-Way
One-way slotted drive.
One-Way
Minimal: Removal tools available to public.
One-Way
Button.
One-Way
Steel, stainless steel, brass.
One-Way
Non-reusable; one-way design.
One-Way
Moderate: One-way design resists casual tampering but not specialized tools.
One-Way
Compatible with one-way removal tools.
One-Way
Manual; one-way installation.
One-Way
Moderate: One-way drive signals tamper resistance.
One-Way
High: Removal tools increase risk.
One-Way
Not specified; Stock items ship quickly.
One-Way
Shear Bolts by Hafren Security Fasteners
The Shear Bolt uses a breakaway hex head that snaps off at a calibrated torque, leaving behind a smooth, ungrippable surface. It's a simple and effective design for creating permanent installations. Once installed, removal typically requires drilling or destructive force. However, the initial install is limited by access to torque tools, and over-tightening or under-tightening can reduce performance.
Shear Bolts
- Single-Use Security
- Utility Fixtures and Covers
- Clean, Tool-Less Finish
Shear Bolts
- Applications Requiring Reuse
- Precise Torque-Sensitive Installs
Shear Bolts
None: One-way design, shears after installation.
Shear Bolts
14-25nm
Shear Bolts
Not specified; likely moderate (e.g., 100 pieces).
Shear Bolts
Extremely high: Shears, resists all removal attempts.
Shear Bolts
$2.67 - $32.91
Shear Bolts
Not specified; likely available for bulk orders.
Shear Bolts
One-way shear design.
Shear Bolts
None: Shears, no removal tools.
Shear Bolts
Cylindrical (bolt head).
Shear Bolts
Steel, stainless steel; A2, A4 options.
Shear Bolts
Non-reusable; permanent installation.
Shear Bolts
Extremely high: Shear design prevents removal.
Shear Bolts
No tools for removal; shear design.
Shear Bolts
Manual or power-driven; shears after installation.
Shear Bolts
High: Shear design signals permanence.
Shear Bolts
None: No removal tools exist.
Shear Bolts
Not specified; likely 1–4 weeks.
Shear Bolts
