McMaster-Carr logo
    Filter by
    System of Measurement
    Thread Type
    Industrial Info Compare
    Fitting Connection
    Connects To
    Body Shape
    Dash Size
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Fabrication
    DFARS Specialty Metals
    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)
    130 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

    Fitting Type

    Extreme-Pressure Iron and Steel Threaded Pipe Fittings

    The strongest steel fittings we offer, these can withstand extreme-pressure applications.
    Note: The maximum pressure listed for Class 6000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
    Straight Connectors
    Image of Product. Front orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Straight Connectors, Threaded Fitting Connection, Female.

    Female, Threaded

    Fitting Connection

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Thread Size
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Each
    Metric Female
    M12 × 1.5 mmHexZinc-Plated Steel4,500 psi @ 72° F4936K979000000
    M14 × 1.5 mmHexZinc-Plated Steel4,500 psi @ 72° F4936K98100000
    M16 × 1.5 mmHexZinc-Plated Steel4,000 psi @ 72° F4936K98300000
    M18 × 1.5 mmHexZinc-Plated Steel4,000 psi @ 72° F4936K98400000
    M20 × 1.5 mmHexZinc-Plated Steel3,500 psi @ 72° F4936K98500000
    M22 × 1.5 mmHexZinc-Plated Steel3,500 psi @ 72° F4936K98700000
     
    Straight Adapters
    Image of Product. Female x Male. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Female, Male, Hex Body.

    Female x Male

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Thread Size
    (A)
    Pipe Size
    (B)
    Dash Size
    (B)
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Each
    Metric Female × NPT Male
    M8 × 1 mm1/8
    		02HexZinc-Plated Steel5,000 psi @ 72° F4936K856000000
    M10 × 1 mm1/8
    		02HexZinc-Plated Steel5,000 psi @ 72° F4936K85700000
    M10 × 1.5 mm1/8
    		02HexZinc-Plated Steel5,000 psi @ 72° F4936K85800000
    M12 × 1.5 mm1/4
    		04HexZinc-Plated Steel6,000 psi @ 72° F4936K85900000
    M14 × 1.5 mm1/4
    		04HexZinc-Plated Steel6,000 psi @ 72° F4936K86100000
    M14 × 1.5 mm3/8
    		06HexZinc-Plated Steel5,500 psi @ 72° F4936K86300000
    M16 × 1.5 mm1/4
    		04HexZinc-Plated Steel6,000 psi @ 72° F4936K86200000
    M16 × 1.5 mm3/8
    		06HexZinc-Plated Steel5,500 psi @ 72° F4936K86400000
    M18 × 1.5 mm3/8
    		06HexZinc-Plated Steel5,500 psi @ 72° F4936K86500000
    M18 × 1.5 mm1/2
    		08HexZinc-Plated Steel4,500 psi @ 72° F4936K86600000
    M20 × 1.5 mm1/2
    		08HexZinc-Plated Steel4,500 psi @ 72° F4936K86700000
    M22 × 1.5 mm1/2
    		08HexZinc-Plated Steel4,500 psi @ 72° F4936K86800000
    M26 × 1.5 mm3/4
    		12HexZinc-Plated Steel3,500 psi @ 72° F4936K86900000
     
    Straight Adapters with Gasket
    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Pipe Size
    (A)
    Thread Size
    (B)
    Dash Size
    (A)
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Gasket
    Material
    Each
    NPT Female × Metric Male
    Image of Product. Female x Male. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Threaded Fitting Connection, Female, Male, Hex Body.

    Female x Male

    1/8
    		M6 × 0.75 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K833000000
    1/8
    		M6 × 1 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K83500000
    1/8
    		M8 × 1 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K83600000
    1/8
    		M10 × 1 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K1530000
    1/8
    		M10 × 1.5 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K83900000
    1/8
    		M12 × 1.5 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K84200000
    1/4
    		M10 × 1 mm04HexZinc-Plated Steel4,500 psi @ 72° FBuna-N
    		4936K83800000
    1/4
    		M10 × 1.5 mm04HexZinc-Plated Steel5,000 psi @ 72° FBuna-N
    		4936K84100000
    1/4
    		M12 × 1 mm04HexZinc-Plated Steel4,500 psi @ 72° FBuna-N
    		4936K84400000
    1/2
    		M16 × 1.5 mm08HexZinc-Plated Steel3,500 psi @ 72° FBuna-N
    		4936K15800000
    1/2
    		M20 × 1.5 mm08HexZinc-Plated Steel3,500 psi @ 72° FBuna-N
    		4936K45100000
    3/4
    		M26 × 1.5 mm12HexZinc-Plated Steel3,000 psi @ 72° FBuna-N
    		4936K85300000
    3/4
    		M27 × 2 mm12HexZinc-Plated Steel3,000 psi @ 72° FBuna-N
    		4936K45300000
     
    BSPP Male × Metric Male
    Image of Product. Male x Male. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Threaded Fitting Connection, Male, Hex Body.

    Male x Male

    1/8
    		M10 × 1 mm02HexZinc-Plated Steel5,000 psi @ 72° FBuna-N4936K74500000
    1/4
    		M10 × 1.5 mm04HexZinc-Plated Steel6,000 psi @ 72° FBuna-N4936K74800000
    1/4
    		M12 × 1.5 mm04HexZinc-Plated Steel6,000 psi @ 72° FBuna-N4936K74900000
    1/4
    		M14 × 1.5 mm04HexZinc-Plated Steel6,000 psi @ 72° FBuna-N4936K75100000
    3/8
    		M12 × 1.5 mm06HexZinc-Plated Steel5,500 psi @ 72° FBuna-N4936K75200000
    3/8
    		M14 × 1.5 mm06HexZinc-Plated Steel5,500 psi @ 72° FBuna-N4936K75300000
    3/8
    		M16 × 1.5 mm06HexZinc-Plated Steel5,500 psi @ 72° FBuna-N4936K75400000
    3/8
    		M20 × 1.5 mm06HexZinc-Plated Steel4,500 psi @ 72° FBuna-N4936K1100000
    1/2
    		M18 × 1.5 mm08HexZinc-Plated Steel4,500 psi @ 72° FBuna-N4936K75500000
    1/2
    		M20 × 1.5 mm08HexZinc-Plated Steel4,500 psi @ 72° FBuna-N4936K75600000
    1/2
    		M22 × 1.5 mm08HexZinc-Plated Steel4,500 psi @ 72° FBuna-N4936K75700000
    5/8
    		M22 × 1.5 mm—HexZinc-Plated Steel4,000 psi @ 72° FBuna-N4936K75800000
    3/4
    		M24 × 1.5 mm12HexZinc-Plated Steel3,500 psi @ 72° FBuna-N4936K76100000
    1
    		M36 × 1.5 mm16HexZinc-Plated Steel3,000 psi @ 72° FBuna-N4936K76200000
     
    Straight Reducers
    Image of Product. Female. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Straight Reducers, Threaded Fitting Connection, Female.

    Female

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Thread
    Size
    (A)
    (B)
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Each
    Metric Female × Metric Female
    M16 × 1.5 mmM12 × 1.5 mmHexZinc-Plated Steel4,500 psi @ 72° F4936K982000000
    M22 × 1.5 mmM16 × 1.5 mmHexZinc-Plated Steel4,000 psi @ 72° F4936K98600000
     
    Hex-Drive Plugs with Gasket
    Image of Product. Front orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Hex-Drive Plugs with Gasket, Male, Threaded Fitting Connection.

    Threaded

    Fitting

    Connection,

    Male

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Thread Size
    Material
    Max. Pressure
    @ Temp.
    Gasket
    Material
    Each
    Metric Male
    M10 × 1 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K92500000
    M12 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K9260000
    M14 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K9270000
    M16 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K9280000
    M18 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K9290000
    M20 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K93100000
    M22 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K93200000
    M24 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K93300000
    M26 × 1.5 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K93400000
    M27 × 2 mmZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K93500000
     
    External-Hex-Drive Plugs with Gasket
    Image of Product. Male. Front orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, External-Hex-Drive Plugs with Gasket, Male, Threaded Fitting Connection, Hex Body.

    Male

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Thread Size
    Construction
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Gasket
    Material
    Each
    Metric Male
    M10 × 1 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K67500000
    M12 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K8890000
    M14 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K8910000
    M16 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K8920000
    M18 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K8930000
    M20 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K89400000
    M22 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K89500000
    M24 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K89600000
    M26 × 1.5 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K89700000
    M30 × 2 mmSolidHexZinc-Plated Steel5,600 psi @ 72° FBuna-N
    		4936K89800000
     
    Replacement Washers
    Image of Product. Front orientation. Sealing Washers.
    For Pipe
    Size
    For Thread
    Size
    ID,
    mm
    OD,
    mm
    Thk.,
    mm
    Each
    For BSPP Male
    1/8
    		—8.5615.8824936K66100000
    1/4
    		—11.4520.572.034936K6620000
    3/8
    		—14.9623.824936K6330000
    1/2
    		—18.6428.582.54936K6340000
    5/8
    		—20.631.752.54936K6350000
    3/4
    		—24.1334.932.54936K6360000
    1
    		—30.342.83.24936K6630000
     
    For Metric Male
    —M6
    		4.71114936K6450000
    —M8
    		6.41414936K6460000
    —M10
    		8.5615.8824936K6470000
    —M12
    		9.73181.54936K6480000
    —M14
    		11.38211.54936K6490000
    —M16
    		13.41241.54936K6510000
    —M18
    		14.76261.54936K6520000
    —M20
    		16.76281.54936K6530000
    —M22
    		18.743024936K6540000
    —M24
    		20.113224936K6550000
    —M26
    		24.1334.932.54936K6560000
    —M27
    		23.23624936K6570000
    —M30
    		25.73924936K6580000
     

    Extreme-Pressure Stainless Steel Threaded Pipe Fittings

    With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.
    Straight Adapters with Gasket
    316 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 Stainless Steel
    Pipe Size
    (A)
    Thread Size
    (B)
    Dash Size
    (A)
    Body
    Shape
    Gasket
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Female × Metric Male
    Image of Product. Female x Male. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Female, Male, Threaded Fitting Connection, Hex Body.

    Female x Male

    1/8
    		M10 × 1 mm02HexBuna-N
    		5,000 psi @ 72° F4822T392000000
    1/4
    		M12 × 1.5 mm04HexBuna-N
    		5,000 psi @ 72° F4822T39300000
    1/4
    		M14 × 1.5 mm04HexBuna-N
    		5,000 psi @ 72° F4822T39400000
    3/8
    		M16 × 1.5 mm06HexBuna-N
    		4,500 psi @ 72° F4822T39500000
    3/8
    		M18 × 1.5 mm06HexBuna-N
    		4,500 psi @ 72° F4822T39600000
    1/2
    		M18 × 1.5 mm08HexBuna-N
    		4,000 psi @ 72° F4822T39700000
    1/2
    		M20 × 1.5 mm08HexBuna-N
    		3,500 psi @ 72° F4822T39800000
    1/2
    		M22 × 1.5 mm08HexBuna-N
    		3,500 psi @ 72° F4822T39900000
     
    BSPP Male × Metric Male
    Image of Product. Male x Male. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Threaded Fitting Connection, Male, Hex Body.

    Male x Male

    1/4
    		M12 × 1.5 mm04HexBuna-N5,000 psi @ 72° F4822T16600000
    1/4
    		M14 × 1.5 mm04HexBuna-N5,000 psi @ 72° F4822T16700000
    1/4
    		M16 × 1.5 mm04HexBuna-N5,000 psi @ 72° F4822T16800000
    3/8
    		M16 × 1.5 mm06HexBuna-N5,000 psi @ 72° F4822T17100000
    3/8
    		M20 × 1.5 mm06HexBuna-N5,000 psi @ 72° F4822T17300000
    1/2
    		M16 × 1.5 mm08HexBuna-N4,500 psi @ 72° F4822T17400000
    1/2
    		M18 × 1.5 mm08HexBuna-N4,500 psi @ 72° F4822T17500000
    1/2
    		M20 × 1.5 mm08HexBuna-N4,500 psi @ 72° F4822T17600000
    1/2
    		M22 × 1.5 mm08HexBuna-N4,500 psi @ 72° F4822T17700000
    3/4
    		M22 × 1.5 mm12HexBuna-N3,600 psi @ 72° F4822T17900000
    3/4
    		M27 × 2 mm12HexBuna-N3,600 psi @ 72° F4822T18100000
     
    Hex-Drive Plugs with Gasket
    Image of Product. Male. Front orientation. Pipe and Fittings. Extreme-Pressure Stainless Steel Threaded Pipe Fittings, Hex-Drive Plugs with Gasket, Male, Threaded Fitting Connection.

    Male

    316 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.
    Fluoroelastomer—These gaskets resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol.
    316 Stainless Steel
    Thread Size
    Gasket
    Material
    Max. Pressure
    @ Temp.
    Each
    Metric Male
    M10 × 1 mmFluoroelastomer
    		5,800 psi @ 72° F4822T276000000
    M12 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T27700000
    M14 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T27800000
    M16 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T27900000
    M18 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T28100000
    M20 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T28200000
    M22 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T28300000
    M26 × 1.5 mmFluoroelastomer
    		5,800 psi @ 72° F4822T28400000
    M27 × 2 mmFluoroelastomer
    		5,800 psi @ 72° F4822T28500000
    M33 × 2 mmFluoroelastomer
    		5,800 psi @ 72° F4822T28600000
     
    Replacement Washers
    Image of Product. Front orientation. Sealing Washers.
    For Pipe
    Size
    For Thread
    Size
    ID,
    mm
    OD,
    mm
    Thk.,
    mm
    Each
    For BSPP Male
    1/4
    		—11.4520.572.034822T40200000
    3/8
    		—14.9623.824822T4030000
    1/2
    		—18.6428.582.54822T4040000
    3/4
    		—24.1334.932.54822T4060000
     
    For Metric Male
    —M10
    		8.5615.8824822T4140000
    —M12
    		9.73181.54822T4150000
    —M14
    		11.38211.54822T4160000
    —M16
    		13.41241.54822T4170000
    —M18
    		14.76261.54822T41800000
    —M20
    		16.76281.54822T41900000
    —M22
    		18.743024822T42100000
     

    High-Pressure Iron and Steel Threaded Pipe Fittings

    These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
    Note: The maximum pressure listed for Class 3000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
    Straight Adapters with Gasket
    Image of Product. Female × Male. Front orientation. Contains Annotated. Pipe and Fittings. High-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Threaded Fitting Connection, Female, Male, Hex Body.

    Female × Male

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Pipe Size
    (A)
    Thread Size
    (B)
    Dash Size
    (A)
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Gasket
    Material
    Each
    NPT Female × Metric Male
    1
    		M33 × 2 mm16HexZinc-Plated Steel2,500 psi @ 72° FBuna-N
    		4936K454000000
     
    Replacement Washers
    Image of Product. Front orientation. Sealing Washers.
    For Thread
    Size
    ID,
    mm
    OD,
    mm
    Thk.,
    mm
    Each
    For Metric Male
    M33
    		28.74224936K65900000
     
    back to top