McMaster-Carr logo
    Filter by
    System of Measurement
    Tank Connection Method
    For Tank Surface
    Fitting Type
    Pipe Material
    Gender
    Connects To
    Fitting Connection
    Industrial Info Compare
    Mounting Location
    Pipe Schedule
    Industrial Info Snippet
    Flange Material
    Maximum Pressure @ Temperature
    DFARS Specialty Metals
    For Tank OD
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    12 Products
    About Pipe and Fittings
    industrial info icon

    Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

    Fitting Type

    Performance

    Low-Pressure Stainless Steel Threaded Pipe Fittings

    Use these fittings in a low-pressure pipe line.
    Straight Adapters for Tanks
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters for Tanks, Threaded Fitting Connection, Female, Butt-Weld Fitting Connection, For Curved Tank Surfaces.

    Female × Butt

    Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    316/316L Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    316/316L Stainless Steel
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    OD (B)
    For Tank
    Surface (B)
    Max. Pressure
    @ Temp.
    Each
    NPTF Female × Butt Weld
    3/4
    		1 1/8"2 3/8"20"CurvedNot Rated1698T31000000
    1
    		1 3/8"2 5/16"20"CurvedNot Rated1698T3200000
    1 1/2
    		2 1/16"3 1/4"21"CurvedNot Rated1698T3300000
     

    Low-Pressure Aluminum Threaded Pipe Fittings

    In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.
    Straight Adapters for Tanks
    Image of Product. NPTF Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Threaded Pipe Fittings, Straight Adapters for Tanks, Female, Threaded Fitting Connection, Butt-Weld Fitting Connection, For Curved Tank Surfaces.

    NPTF Female ×

    Butt Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    OD (B)
    For Tank
    Surface (B)
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female × Butt Weld
    1 1/4
    		1 3/4"2 13/16"36"Curved6061 AluminumNot Rated1698T2100000
    1 1/2
    		2"3 1/4"36"Curved6061 AluminumNot Rated1698T220000
     

    Low-Pressure Iron and Steel Threaded Pipe Fittings

    Use these fittings for low-pressure applications in noncorrosive environments.
    Straight Adapters for Tanks
    Image of Product. Female × Butt Weld (For Curved Surface). Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters for Tanks, Female, Threaded Fitting Connection, Butt-Weld Fitting Connection, For Curved Tank Surfaces.

    Female × Butt Weld

    (For Curved Surface)

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    OD (B)
    For Tank
    Surface (B)
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female × Butt Weld
    3/4
    		1 1/8"2 3/16"20"CurvedSteelNot Rated1698T1100000
     
    180° Bend Connectors
    Image of Product. Front orientation. Pipe Traps. Low-Pressure Iron and Steel Threaded Pipe Fittings.
    180° bend connectors are also known as U-bends.
    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Certification
    Shape
    Each
    NPT Female
    3/4
    		Iron150 psi @ 72° F150 psi @ 350° FUL Listed
    		180° Bend44605K564000000
     

    High-Pressure Brass and Bronze Threaded Pipe Fittings

    High pressures are no problem for these heavy-duty fittings. They are brass for good corrosion resistance.
    Through-Wall Straight Connectors
    Image of Product. Exploded View. Front orientation. Exploded view. Pipe and Fittings. High-Pressure Brass and Bronze Threaded Pipe Fittings, Through-Wall Straight Connectors, Female, Threaded Fitting Connection, Hex Body.

    Exploded View

    Through-wall fittings are also known as bulkhead couplings; they mount through your wall or tank to create an inlet or outlet. When installing, the gasket should be on the inside of the wall.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe
    Size
    For Hole
    Dia.
    For Max.
    Wall Thk.
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female
    1/8
    		5/8"57/64"HexBrass1,000 psi @ 72° F50785K27200000
    1/4
    		3/4"13/16"HexBrass1,000 psi @ 72° F50785K27300000
    3/8
    		1"5/8"HexBrass1,000 psi @ 72° F50785K27400000
    1/2
    		1 1/8"3/4"HexBrass1,000 psi @ 72° F50785K27500000
    1
    		——HexBrass1,000 psi @ 72° F50785K73600000
     
    back to top