DK-LOK® is the preferred supplier of Tube Fittings, Valves, Manifolds, Quick Connects, Gauges and other products necessary for the proper function of analytical and process instrumentation, gas, power generation, petrochemical processing, shipbuilding, alternative fuels, bio-pharmaceuticals, semiconductor manufacturing. DK-LOK® fittings and valves are manufactured to stringent industry standards. With the use of only the highest grade raw material and 1/1000" tolerance control on each and every part, DK-LOK® assures a leak-tight seal in all process, power, and instrumentation applications. Testaments to DK-LOK®'s quality are their N and NPT stamps awarded by ASME for the use of their products in Nuclear applications. In addition, DK-LOK® has obtained approvals from such agencies as Lloyd's Register, DN, ABS, etc; making them one of the most certified tube fitting and valve manufacturer in the world.