Mechanical - Electrical - Instrumentation




DK-Lok Corporation, a world class manufacturer of DK-Lok products since 1986, proudly carries the ASME N Stamp, TUV and CRN certifications among many others.

There is no need to sacrifice superior quality and safety with instrumentation fittings and valves. DK-Lok instrumentation fittings, tubing and valves are precisely designed for leak-free connections in high-pressure processes. DK-Lok offers a cost-effective, ultra-high quality alternative to the commonly known brand Swagelok.

Rigorous quality assurance inspections and testing confirm that DK-Lok is interchangeable and intermixable with Swagelok.

Both in-house and third party testing by Garwood Laboratories Inc. confirm that DK-Lok is interchangeable with Swagelok fittings due to the the manufacturing and process of:

  • Threads
  • Make-up distance
  • Bore
  • Sealing integrity
  • Surface finish
  • Design
  • Pressure ratings

Guaranteed Swagelok Alternative

Copies of the following documents are available upon request.

  • DK-Lok Corporation provides a Liability Statement to confirm the interchangeability of DK-Lok and Swagelok through quality assurance measures and testing.
  • Third party Gardwood Laboratories Inc. (now bought out by National Technical Systems) performed thorough inspections and testing on four DK-Lok spool assemblies to confirm the interchangeability with Swagelok products. 

  • DK-Lok has full ASTM F-1387 testing available with supporting test procedures and documented results.

Swagelok Alternatives & Equivalencies 

Please visit product pages to see Swagelok equivalent products. We have Swagelok alternatives for:

  • Ball valves
  • Tube Fittings
  • Needle Valves
  • Quick Connects
  • Hose
  • High Pressure Fittings & Valves
  • Tubing & accessories
  • Check & Relief Valves
  • Filters
  • Regulators
  • Instrument manifolds
  • Metering Valves
  • Threaded and Weld Fittings
  • Sealants and Leak Detectors
  • Tools


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