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NYLOK® Blue Patch (TUF-LOK®) Application

NYLOK® Blue Patch (TUF-LOK®)

Thread Locking and Sealing Service from Lancaster Fastener


Lancaster Fastener can now offer Fastener Distributors worldwide a fast and efficient NYLOK® Blue Patch application service throughout their extensive Machine Screw product ranges.


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.

NYLOK® 360° TUF-LOK® Blue Patch on Zinc Plated Steel Machine Screws

NYLOK® Blue Patches from Lancaster Fastener


  • Low Minimum Order Quantities

  • Fast and efficient delivery service

  • Competitive pricing

  • Applicable to diameters M2 through to M8

  • 180° or 360° patch coverage

  • Applicable on Zinc Plated Steel, A2 Stainless Steel and Black Finishes

NYLOK® 180° TUF-LOK® Blue Patch on Black Finished Machine Screws


  • 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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