DK-LOK® is the preferred supplier of Tube Fittings, Valves, Manifolds, Quick Connects, Gauges and other products necessary fo ... r 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. read more