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NYLOK® Blue Patching Service

NYLOK® Blue Patch (TUF-LOK®)

Thread Locking and Sealing solutions from Lancaster Fastener


NYLOK® Blue Patch is a self-locking element comprised of nylon permanently bonded onto the threads of a fastener. When the NYLOK® Blue Patch is engaged it creates a wedge between the fastener and mating part, compressing the nylon and creating metal-to-metal contact opposite the patch, This metal-to-metal contact results in a positive resistance to vibration and loosening. Since nylon has great memory characteristics, this locking element can be reused several times.

NYLOK® 180° Standard Blue Patch (TUF-LOK®)


This patch is applied to an area covering approximately 180° of the circumference of the thread. It offers excellent resistance to vibration in applications that require increased thread locking and re-usability.

NYLOK® 360° Optional Blue Patch (TUF-LOK®)


This patch is applied to an area covering the entire circumference of the thread. This process is suited to applications that require a re-usable high pressure seal against liquids or gas.

Technical Data

  • Standard Patch Length : 4-6 Threads

  • Colour : Blue

  • Standard patch starts 1-2 threads from the end of the fastener

  • Shelf-Life : Indefinite

Advantages of NYLOK® Blue Patch (TUF-LOK®)

  • Reusable/adjustable

  • Resistant to lubricants, fuel, hydraulic fluid and most commercial solvents

  • No metal removal to reduce fastener strength or performance

  • Bonds to a broad range of fastener finishes

  • Parts are ready for assembly

  • Not affected by high humidity conditions

  • Exceptional vibration resistance

  • Can be applied to any size of thread configuration

  • Complies with or exceeds IFI, DIN and major OEM specifications

  • Provides a seal for threads

  • Precise thread coverage on every part

  • Environmentally friendly/non-toxic

  • Torque can be adjusted to meet specific applications

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