Our large range of mechanical components offers solutions to everyday machine and tooling assemblies. The range includes: captive screws and shoulder screws of every head and size, special sealing screws, nuts and washers, dowel pins, levelling feet and lifting bolts.
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Surface finishes such as cadium plating, nickel plating, armalloy coating, black oxide coating - all available on request.
This type of fastener is the only fastener that retains its locking torque independent of an axial load. When pre-load is lost, the prevailing torque fastener can prevent the loosening of an assembly subjected to continued shock or vibration.
The nylon strip wedges the fastener against the opposite of the locking device, causing metal-to-metal drag.
A resilient polymer (generally nylon) strip is inserted into a precisely machined slot that is milled into the thread. The strips are typically positioned one to three threads back from the end of the fastener to assure ease of starting.
When assembled with a mating part the strip is compressed and this provides a locking action in the thread. The locking strip is held in place on the thread without the use of adhesives or thread distortion. This results in a reusable fastener that is both locking and repeatedly adjustable.
These self-locking fasteners are produced to IFI 524 standard (requiring a re-usability of up to 15 on/off cycles). The strips will not dry, shrink or lose resiliency when exposed to commercial solvents, alcohol, oil etc.
Standard nylon temperature range (-50°C to +120°C). Other materials available which can off er -250°C to +300°C (with lower reusability cycles).
We recommend a countersunk or counter-bored clearance hole to aid installation.
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