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Threaded Fittings

Threaded Fittings

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:

    Threaded to Threaded Fittings

Male threaded nipple

  • 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 reducer nipple

  • 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".
  • NPT straight female coupling

  • Straight Threaded Couplings are female-to-female threaded connectors. Available in 4 materials in sizes from 1/8" to 1".
  • NPT female reducer coupling

  • 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".
  • Reducing bushing

  • 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 threaded union elbow

  • 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 elbow

  • 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 thread tee

  • 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".
  • Right-angle tee

  • 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".
  • Threaded pipe plug

  • 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.
  • NPT to British thread adapter

  • Female NPT to British Male Thread Adapters provide an easy solution to mate equipment with BSPP (British Standard Pipe Threaded) or BSPT (British Standard Pipe Tapered Threaded) ports to standard NPT terminations. Choose from adapters that convert from male BSP to female NPT, or male NPT ro female BSP. Adapters are available in brass and 316 stainless steel and are availabe in port sizes from 1/8" to 3/4".
  • Thread fitting kit

  • Threaded Fitting Kits provide you with a wide range of fittings and the easy storage of a compartmentalized case to organize them. Kits are available in 4 materials and feature an assortment of elbows, tees, plugs, and nipples.BSPT Threaded Fitting Kits are also available.
    • Bulkhead Connectors

    Bulkhead connector

  • Bulkhead Connectors feature female NPT connections to attach to tanks, bags, and other mass storage vessels to allow easy dispensing or controlled flow. They are available in nylon (no seal gasket), PVC (neoprene gasket), polypropylene (neoprene gasket), linear low-density polyethylene (LLDPE, with EPDM gaskets), and PVDF (FKM gaskets). Sizes range from 1/8" female NPT x 5/8" OD to 3" female NPT to 4-3/8" OD.
  • Swivel bulkhead connector

  • Swivel Bulkhead Connectors are female NPT bulkhead connectors that feature an additional joint that swivels in socket for easier fit and use. Available in PVC in sizes from 1" to 3".
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    Representative photo only Bulkhead Connectors 1 NPT F to 2 5 8 OD LDPE

    Bulkhead Connectors, 1" NPT(F) to 2-5/8" OD, LDPE

    Product Type Bulkhead Fitting,Material LLDPE
    EW-06924-51
    In stock.
    $20.75 USD/EACH

    Qty:

    EW-06924-50 Bulkhead connectors NPT(F) x OD, LLDPE, 3/4" NPT x 1-9/16" OD, 1-3/8", 3", 1",
    EW-06924-50
    In stock.
    $14.75 USD/EACH

    Qty:

    EW-06349-40 Female-to-male threaded elbows, nylon, 1/8 NPT(F) x 1/8 NPT(M), pack of 6

    Female-to-male threaded elbows, nylon, 1/8 NPT(F) x 1/8 NPT(M), pack of 6

    Product Type Threaded Fitting,Material Nylon,NPT(M) in. 0.125
    EW-06349-40
    In stock.
    $21.25 USD/PACKAGE of 6

    Qty:

    Representative photo only Female threaded tee fittings nylon 1 2 NPT F pack of 6

    Female threaded tee fittings, nylon, 1/2" NPT(F), pack of 6

    Product Type Threaded Fitting,Material Nylon
    EW-06349-53
    In stock.
    $53.50 USD/PACKAGE of 6

    Qty:
    See all Tees, NPT(F)

    Representative photo only Bulkhead Connectors 1 4 NPT F to 27 32 OD PVC

    Bulkhead Connectors, 1/4" NPT(F) to 27/32" OD, PVC

    Product Type Bulkhead Fitting,Material PVC
    EW-06445-10
    In stock.
    $12.00 USD/EACH

    Qty:

    EW-31830-41 Threaded adapter, stainless steel, 1/4

    Threaded adapter, stainless steel, 1/4" female BSPT to 1/4" male NPT

    Product Type Threaded Fitting,Material Stainless Steel
    EW-31830-41
    Call 1-888-358-4705 for availability.
    $21.50 USD/EACH

    Qty:

    Representative photo only Male Threaded Pipe Plug 1 4 NPT M PTFE

    Male Threaded Pipe Plug, 1/4" NPT(M), PTFE

    Product Type Threaded Fitting,Material PTFE,NPT(M) in. 0.25
    EW-34030-56
    In stock.
    $25.00 USD/EACH

    Qty:

    Representative photo only Bulkhead connectors nylon 1 4 NPT F x 3 4 OD pack of 6

    Bulkhead connectors, nylon, 1/4" NPT(F) x 3/4" OD, pack of 6

    Product Type Bulkhead Fitting,Material Nylon
    EW-06349-11
    In stock.
    $59.00 USD/PACKAGE of 6

    Qty:

    Representative photo only Straight threaded coupling nylon 1 8 NPT F pack of 6

    Straight threaded coupling, nylon, 1/8" NPT(F), pack of 6

    Product Type Threaded Fitting,Material Nylon
    EW-06349-00
    In stock.
    $23.00 USD/PACKAGE of 6

    Qty:

    EW-06349-50 Female threaded tee fittings, nylon, 1/8" NPT(F), pack of 6

    Female threaded tee fittings, nylon, 1/8" NPT(F), pack of 6

    Product Type Threaded Fitting,Material Nylon
    EW-06349-50
    In stock.
    $32.75 USD/PACKAGE of 6

    Qty:
    See all Tees, NPT(F)

    Representative photo only Female to male threaded elbows nylon 1 4 NPT F x 1 4 NPT M pack of 6

    Female-to-male threaded elbows, nylon, 1/4 NPT(F) x 1/4 NPT(M), pack of 6

    Product Type Threaded Fitting,Material Nylon,NPT(M) in. 0.25
    EW-06349-41
    In stock.
    $22.25 USD/PACKAGE of 6

    Qty:

    Representative photo only Bulkhead connector polypropylene 1 2 female NPT x 1 3 8 OD

    Bulkhead connector, polypropylene, 1/2" female NPT x 1-3/8" OD

    Product Type Bulkhead Fitting,Material Polypropylene
    EW-06447-21
    In stock.
    $14.00 USD/EACH

    Qty:

    Representative photo only Threaded reducing bushing PFA 1 4 NPTM x 1 8 NPTF

    Threaded reducing bushing, PFA, 1/4" NPTM x 1/8" NPTF

    Product Type Compression Fitting,Material PFA
    EW-06546-05
    In stock.
    $26.00 USD/EACH

    Qty:

    Representative photo only Female Threaded Straight Coupling 1 4 NPT F 316 SS

    Female Threaded Straight Coupling, 1/4" NPT(F), 316 SS

    Product Type Threaded Fitting,Material Stainless Steel
    EW-31410-01
    In stock.
    $25.50 USD/EACH

    Qty:

    Representative photo only Female threaded reducers PVC 1 2 NPT F x 1 4 NPT F pack of 6

    Female threaded reducers, PVC, 1/2 NPT(F) x 1/4 NPT(F), pack of 6

    Product Type Threaded Fitting,Material PVC
    EW-06349-93
    In stock.
    $55.50 USD/PACKAGE of 6

    Qty:

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