Decide whether the joint must be removable
The custom requirement is often the fastener’s fit within a particular clamp assembly. Keep the complete stack thickness and tool approach visible when asking for a matching component. With a shear nut, the driving portion separates at the fastener's specified installation condition, leaving a body that is harder to grip with ordinary tools. A removable security-drive fixing instead relies on a matching tool. Specify the required approach before ordering spares or installation equipment.
For maintenance access points, record who will retain the tools and how replacement fasteners are identified. Where a permanent fixing must be removed, allow for replacement parts and the manufacturer's removal method rather than assuming the nut can be reused.
Define the complete joint in the fastener enquiry
The fastener passes through a stack of components: the clip or bar, mesh connection, post or backing member, and any washers or spacers. The required length depends on that assembly and the specified nut engagement.
| Order field | Detail to identify |
|---|---|
| Thread | Diameter and pitch |
| Length | Measurement convention appropriate to the head form |
| Material and finish | Required grade and surface treatment |
| Security feature | Drive pattern, shear type or other specified arrangement |
| Set contents | Bolt, nut, washers and any dedicated tool |
Avoid substitutions based only on a matching diameter. A different head can interfere with the clip or tool access; a different nut can change the installation and removal procedure.
Tightening belongs to the specified assembly
Use the installation requirements for the selected fastener and connection. Do not adopt a generic tightening value from another fence or from a fastener with the same nominal thread. Check that the clip seats correctly before final tightening.
Reference the fastener specification in the clamp and fixing schedule. This keeps future orders tied to the joint they must fit, including any change to post thickness or clamp arrangement.
Custom order specification: anti-tamper fence fasteners
| Order detail | What to define with our team |
|---|---|
| Thread and length | State diameter, pitch, head measurement convention and required engagement. |
| Security feature | Identify shear or removable-drive construction and the installation tool. |
| Set contents | List material, finish, washers, nuts, drivers and quantities for each assembly. |
Confirm the selected fastener specification and installation method against the actual joint. Where samples are agreed, check seating and tool access before the batch order. Routine dimensional inspection does not establish a fence-system security rating.
Can a standard bolt be replaced by a security-drive fastener?
We need the joint drawing and maintenance requirements to review a replacement. Matching thread diameter is insufficient if the head, length, tool access or removal method differs.