Normally a resilient bar of Nylon that is inserted into a slot which has been milled into a threaded fastener, ND Strip makes fasteners self-locking, self-sealing, and yet fully adjustable. Ideal for all types and sizes of commercial, automotive, and aerospace fasteners, ND Strip delivers outstanding performance in both high and low temperature extremes. Due to its compressibility, resiliency, and resistance to deformation, fasteners using ND Strip can be repeatedly removed and adjusted.
Customer fasteners are first sent to ND for processing. Using custom equipment we mill a slot into the fastener threads, deburr any edges, then have the part sent out for re-plating if necessary. Next a tough strip typically made of nylon is inserted into the slot. Completed parts are shipped back to the customer. When assembled with a mating part the resilient nylon is compressed. This compression exerts a force 180° opposite, increasing metal to metal contact and holding the fastener in place without adhesives or thread distortion. The engineered plastic strip provides locking action in the thread instead of at the bearing surface.
ND Strip processed fasteners have a wider range of adjustment and larger working area than most other locking elements due to the fact that the insert runs parallel to the length of the fastener.
Nylon ND Strip meets and exceeds MIL-DTL-18240F, Type L for temperatures up to +250°F (+121°C). Using other materials, ND Strip can withstand temperatures as high as +1,200°F (+649°C).
Nylon is virtually impervious to a wide range of chemicals, water, and motor fluids. Will not dry, shrink, or lose resiliency when exposed to commercial solvents, alcohol, gasoline, oil, caustic soda, jet fuel, and many other chemicals.
Due to its resiliance, nylon strip inserts can be adjusted and removed several times without substantially decreasing the fasteners locking ability and without damage to threads.
ND Strip processing can be customized to meet your specific requirements by adjusting the length and diameter of the installed material.
ND Strip processing is excellent for use on non-metallic fasteners where a chemical threadlocker could deteriorate the substrate.