Tamper-resistant TurnLock fasteners for controlled access
Yes, TurnLock quarter-turn fasteners are available with several tamper-resistant head styles.
These fasteners require a matching operating tool, making it more difficult to open a panel with a standard screwdriver. They can be useful for machinery guards, public equipment, transport systems, enclosures and other applications where access should be restricted.
Tamper-resistant versions are available in different TurnLock families, including the MTH, MHS and HGR series.
Tamper-resistant or tamper-proof?
These products are often described as “tamper-proof”, but tamper-resistant is the more accurate term. The special head helps discourage unauthorised operation, but it does not make the complete installation impossible to open.
Availability and minimum quantities
Many tamper-resistant TurnLock configurations are special-production parts rather than standard stock items.
| Order detail | Typical indication |
|---|---|
| Manufacturing lead time | Approximately 14 weeks for some special configurations |
| Minimum order quantity | Often between 100 and 500 pieces, depending on the design |
| Final availability | Must be confirmed using the complete part number, quantity and required material |
Lead times, minimum quantities and availability can vary. Request a current quotation before finalising the design.
Tamper-resistant option for the MHS series
A tamper-resistant head style is available for compatible MHS medium-duty high-strength assemblies.
The special recess requires a matching operating tool and provides more controlled access than a standard slotted or cross-recess head.
Tamper-resistant pan-head TurnLock
Another option is the tamper-resistant pan-head design, such as the MTHTLT-2N.
This version uses a raised pan head with a special operating recess. It is suitable where a flush panel surface is not required.
Available tamper-resistant head styles
The best head style depends on the required access control, available installation space and whether the fastener must sit flush with the panel.
Single-eye head
A single-eye recess that requires a matching operating tool.
Double-eye head
A raised double-eye head for applications where a low-profile installation is not essential.
Flush double-eye head
A recessed double-eye design for a cleaner, lower-profile panel surface.
Flush double-eye plus head
A flush-mounted special recess intended for operation with a dedicated tool.
Matching receptacles and retaining components
The stud is only one part of the complete TurnLock assembly. The receptacle, retaining method and grip length must also match the selected product series.
Standard receptacle
The receptacle must belong to the same TurnLock family as the selected stud.
Retaining ring
The retaining ring keeps the stud attached to the removable panel when the fastener is unlocked.
Clip-in receptacle
A clip-in receptacle can simplify installation in a correctly prepared frame opening.
Tamper-resistant fasteners for the HGR series
Tamper-resistant head configurations are also available for compatible HGR heavy-duty grommet-retained assemblies.
The 40S80-style design shown below is one example. The complete part number and grip range must be confirmed before it is selected as a replacement or included in a new design.
Which tamper-resistant head should you choose?
| Requirement | Option to consider |
|---|---|
| Low-profile panel surface | Flush double-eye or another recessed tamper-resistant head |
| Simple special-tool operation | Single-eye or double-eye operating head |
| Raised head is acceptable | Tamper-resistant pan-head configuration |
| Medium-duty application | Compatible MTH or MHS assembly |
| Heavy-duty application | Compatible HGR tamper-resistant assembly |
Do not select the head style by appearance alone
The stud, receptacle, retainer and operating tool must be compatible. The total grip thickness must also fall within the specified range for the selected stud length.
Information needed to identify the correct fastener
To recommend a tamper-resistant TurnLock assembly, provide:
- The required TurnLock duty range or existing product series
- The panel and frame thicknesses
- The required head style
- Whether the head must be flush or raised
- The required material and surface finish
- The required quantity
- The preferred receptacle mounting method
- A drawing, photograph or existing part number
Need a tamper-resistant TurnLock fastener?
Send us your application details, required quantity and panel dimensions. We can then check the available MTH, MHS or HGR options and identify the matching receptacle, retaining component and operating tool.