Female and Male NPT Flanges and Adaptive Tees NW/KF Flange Adapters to Female NPT Thread Used to connect pipes, systems and thermocouples (1/8") with NPT thread to NW/KF flange system. Commonly used to connect filters with NPT thread on adaptors on the exhaust port of rotary vane pumps. Use OC® Three as a sealant and to prevent seizing. Please note that NPT (National Pipe Thread) does not refer to the outside diameter of the thread. Please see the NPT Table at the end of this page for size and specifications. NW/KF Flange Adapters to Male NPT Thread Used to connect pipes and systems with NPT thread to NW/KF flange system. Stainless steel adaptors are welded and helium leak tested. Aluminum adaptors are made from one piece (more cost effective alternative). Use OC® Three as a sealant and to prevent seizing. Please note that NPT (National Pipe Thread) does not refer to the outside diameter of the thread. Please see the NPT Table at the end of this page for size and specifications. NW/KF Adaptive Tee to Female NPT In-line Tee connectors with 1/8" and 1/4" female NPT thread. Made out of a solid piece of 304 stainless steel. Use OC® Three as a sealant and to prevent seizing. Please note that NPT (National Pipe Thread) does not refer to the outside diameter of the thread. Please see the NPT Table at the end of this page for size and specifications. NPT - National Pipe Thread Taper - ANSI B1.20.1 Pipe Size(inches) Threads/Inch Approx. Lengthof Thread (inches) Approx Numberof Threads to be cut Nominal Outside Pipe Diameter (inches) Tap Drill 1/8" 27 3/8" 10 0.405" 1/4" 18 5/8" 11 0.540" 7/16" 3/8" 18 5/8" 11 0.675" 37/64" 1/2" 14 3/4" 10 0.840" 23/32" 3/4" 14 3/4" 10 1.050" 59/64" 1" 11-1/2 7/8" 10 1.315" 1-5/32" 1-1/4" 11-1/2 1" 11 1.660" 1-1/2" 1-1/2" 11-1/2 1" 11 1.900" 1-47/64" 2" 11-1/2 1" 11 2.375" 2-7/32" 2-1/2" 8 1-1/2" 12 2.875" 2-5/8"
