Nylon Locking Patch Offered by Captive Fastener
How the ND Patch WorksWhen assembled with a mating part the resilient ND Patch is compressed. The compressed engineered plastic (typically a Nylon Patch) provides locking action in the thread instead of at the bearing surface due to its vibration dampening characteristics. In general, the resilience of the ND Patch holds the fastener in place without adhesives or thread distortion. Due to its resilience, Patch can be repeatedly adjusted and reused.
ND Patch is normally positioned one to three threads back from the end of the fastener to assure ease of starting. The normal coating length of the Patch is four to six threads. Special Patch location and coating length can be specified for specific applications.
Features of the Nylon Locking Patch
- Saves Time: Fasteners coated with ND Patch can be automatically fed through standard feeding devices.
- Retains Full Strength: ND Patch process involves no drilling or milling, so there is no loss of the fastener's strength or hardness and any troublesome burrs or chips.
- Saves Money: Use of ND Patch eliminates the need for costly lock washers, cotter pins, or castellated nuts. You get a close fit without the costs involved in obtaining close tolerances. Moreover, ND Patch is less expensive than applying bottled thread locking compounds at the point of assembly.
- Resists Heat & Cold: ND Patch meets and exceeds IFI Specifications 124 & 524 as well as Military specification MIL-DTL-18240F, Type P, for temperatures from -70°F (-56°C) to +250°F (121°C).
- Chemical Resistant: ND Patch will not dry, shrink, or lose resiliency when exposed to commercial solvents, alcohol, gasoline, oil, caustic soda, jet fuel, etc.
- Reusable: Fasteners coated with ND Patch can be reused repeatedly without damage to threads. ND Patch is particularly resistant to deformation, which makes it ideal for repeated use.
***ND Patch® is a registered trademark of ND Industries.