Cole-Parmer is your trusted source for quality threaded fittings and adapters. We carry NPT fittings (National Pipe Taper fittings), UNF fittings (Unified Fine Thread Fittings), some BSPT threaded adapters (British Standard Pipe Thread), and other threaded fittings. No matter the need, whether connecting equipment or instrumentation to a fluid line, whether a standard nylon or chemically resistant fluoropolymer or stainless steel, we can help you set up your fluid handling system with no leaks, flow restrictions or costly downtime. Our threaded fittings are rated for maximum pressures starting at 150 psi for polyethylene up to 7,500 psi for stainless steel. Cole-Parmer's NPT fitting range includes straight and reducing female couplings, female-to-male elbows, union female elbows, straight and reducing male nipples, reducing bushings, tees and pipe plugs. Cole-Parmer also offers a UNF fitting range that includes straight nipples, plugs, and NPT to UNF reducing bushings. We also offer some bulkhead threaded connectors, and common plastic and polymer pipe fittings are available in kits that make sure you have the right fitting on-hand when you need it.
Threaded fittings are also available to convert to threaded ports from hose barbed connectors for flexible tubing lines or compression nut fittings for rigid tubing lines.
Choose from a variety of materials, including brass, PTFE, high-density polyethylene (HDPE), PVDF, linear low-density polyethylene (LLDPE), polypropylene, nylon, PFA, PVC, and 316 stainless steel.
Cole-Parmer provides you with the information you need to select optimal threaded fittings for your needs. We provide the basic physical property information including temperature and pressure rating for each material formulation. Use our chemical resistance charts to help determine the fitting material with best chemical compatibility to your process. Our selection includes:
Male NPT Threaded Nipples are available in 7 different materials in sizes from 1/8" to 1". Male UNF Threaded Nipples are 10-32 UNF and are available in PVDF, polypropylene and nylon.
Male NPT Reducer Nipples are male-to-male threaded connectors converting between two different port sizes. Available in 6 materials in sizes from 1/4" x 1/8" to 3/4" x 1/2".
Straight Threaded Couplings are female-to-female threaded connectors. Available in 4 materials in sizes from 1/8" to 1".
Female NPT Threaded Reducer Couplings are female-to-female threaded connectors that convert between two different sizes of male thread connections. Available in PVC or 316 stainless steel in sizes from 1/4" x 1/8" to 1" x 3/4".
NPT Reducing Bushings connect a larger female NPT threaded port to a smaller male NPT thread connection. They are available in 5 different materials in sizes from 1/4" male x 1/8" female to 1" male x 3/4" female. NPT to UNF Reducing Bushings convert between 1/8" or 1/4" female NPT and 1/4-28 or 10-32 male UNF. They are available in either nylon or polypropylene.
Female NPT Union Elbows are 90-degree female-to-female threaded connectors. Available in 3 materials in sizes from 1/8" to 1".
Female-Male NPT Elbows are 90-degree female-to-male threaded connectors. Available in nylon and PFA in sizes from 1/8" to 3/4".
Female NPT Tee Fittings are three-way female threaded fittings. All threaded ports are the same size. Available in 3 materials in sizes from 1/8" to 1".
Female-Female-Male Right Angle Tee Connectors are available in nylon in either 1/8" x 1/8" x 1/8" or 3/8" x 3/8" x 3/8".
Male NPT Threaded Plugs are perfect for keeping contaminants from entering a port when not connected. Available in 7 different materials in sizes from 1/16" to 1". Male UNF Threaded Plugs
work well with smaller port sizes. Available in nylon, polypropylene or PVDF in 1/4-28 or 10-32 sizes.