About Long-Lok Long-Lok's 50-year history, locations and contact information. We are ISO 9001:2000 and AS 9100 certified. See our certificate (PDF).

Products Long-Lok's 9 self-locking and self-sealing fastener processes described. Discover which makes the most sense for your project.

Applications Learn how Long-Lok's fasteners solve real-life engineering problems.

Manufacturers' Rep. Network Find a manufacturers' representative near you.

Handbook (1Mb PDF) Long-Lok's Self-Locking & Self-Sealing Fasteners Handbook teaches you the engineering details behind our technology.

Key Military Specification (809Kb PDF) All self-locking fastener suppliers to the military must adhere to MIL-DTL-18240. Long-Lok is included on the official list of suppliers meeting this specification's stringent requirements.

Free Samples, RFQ's & Technical Guidance See for Yourself. Send us a sample of your part or fastener, along with a brief description of its application and performance requirements, and we’ll process it using the most appropriate Long-Lok thread locking or sealing method. Or, to sample a standard Long-Lok fastener, simply supply us with a part number. Samples are provided free. Use our Technical Guidance Form or Call us for assistance. You can also use our Technical Guidance Form as a request for quote.