McMaster-Carr logo
    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)
    67 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

    SAE High-Pressure Stainless Steel Threaded Two-Piece Pipe Flanges

    Combine an adapter with a two-piece pipe flange (sold separately) to build a customized flange connection. Also known as Code 61 or Code 62 split flanges, the two halves of the flange clamp around the adapter and bolt to another Code 61 or Code 62 flange.
    Forged Flanges
    Image of Product. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Threaded Two-Piece Pipe Flanges, Forged Flanges, Flanged, O-Ring Groove.

    Flanged

    O-Ring Groove

    Forged flanges have better strength than cast flanges.
    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Bolt
    Hole
    316/316L
    Stainless Steel
    SAE Pipe
    Flange Size
    Dash
    Size
    Flanged Connection
    Surface
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Max. Pressure
    @ Temp.
    Each
    Flanged
    3/412O-Ring Groove3/8"0.406"45,000 psi @ 72° F1723N370000000
    3/412O-Ring Groove10 mm10 mm45,000 psi @ 72° F1723N42000000
    116O-Ring Groove3/8"0.406"44,600 psi @ 72° F1723N38000000
    116O-Ring Groove10 mm10 mm44,600 psi @ 72° F1723N43000000
    1 1/224O-Ring Groove1/2"0.531"43,000 psi @ 72° F1723N39000000
    1 1/224O-Ring Groove12 mm13 mm43,000 psi @ 72° F1723N44000000
    232O-Ring Groove1/2"0.531"43,000 psi @ 72° F1723N41000000
    232O-Ring Groove12 mm13 mm43,000 psi @ 72° F1723N45000000
     
    Machined Flange Adapters
    Image of Product. Female. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Threaded Two-Piece Pipe Flanges, Machined Flange Adapters, Flanged Fitting Connection, Threaded Fitting Connection, Female.
    Image of Product. Male. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Threaded Two-Piece Pipe Flanges, Machined Flange Adapters, Flanged Fitting Connection, Male, Threaded Fitting Connection.

    Female

    Male

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    UN/UNF (SAE Straight) Thread—Also known as O-ring boss threads.
    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    316/316L
    Stainless Steel
    Pipe Size
    (A)
    Thread Size
    (A)
    For SAE Pipe
    Flange Size (B)
    Dash Size
    (A)
    For Flanged Connection
    Surface
    Max. Pressure
    @ Temp.
    Each
    NPTF Female
    3/4
    		—3/412O-Ring Groove5,000 psi @ 72° F1723N510000000
    1
    		—116O-Ring Groove4,600 psi @ 72° F1723N52000000
    1 1/2
    		—1 1/224O-Ring Groove3,000 psi @ 72° F1723N53000000
    2
    		—232O-Ring Groove3,000 psi @ 72° F1723N54000000
     
    UN/UNF (SAE Straight) Male
    —1 5/16"-12
    		116O-Ring Groove4,600 psi @ 72° F1723N47000000
    —1 7/8"-12
    		1 1/224O-Ring Groove3,000 psi @ 72° F1723N48000000
     

    SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges

    Create an access point in a high-pressure hydraulic fluid line with these flanges. They are also known as Code 61 SAE hydraulic flanges. To connect, bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are 316 stainless steel for excellent corrosion resistance.
    Machined Flanges
    Image of Product. O-Ring Groove Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, O-Ring Groove Surface.
    Image of Product. O-Ring Groove Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, O-Ring Groove Surface.

    O-Ring

    Groove

    Front

    O-Ring

    Groove

    Back

    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Dash
    Size
    Bolt
    Hole
    316/316L
    Stainless Steel
    Pipe Size
    (A)
    SAE Pipe
    Flange Size (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Max. Pressure
    @ Temp.
    Each
    Socket-Connect Female
    3/4
    		3/41212O-Ring Groove3/8"0.406"45,000 psi @ 72° F1431N0150000000
    1
    		11616O-Ring Groove3/8"0.406"45,000 psi @ 72° F1431N016000000
    1 1/2
    		1 1/22424O-Ring Groove1/2"0.531"43,000 psi @ 72° F1431N017000000
    2
    		23232O-Ring Groove1/2"0.531"43,000 psi @ 72° F1431N018000000
     
    Machined Blind Flanges
    Image of Product. O-Ring Groove Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, O-Ring Groove.
    Image of Product. O-Ring Groove Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, O-Ring Groove.

    O-Ring

    Groove

    Front

    O-Ring

    Groove Back

    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Bolt
    Hole
    316/316L
    Stainless Steel
    SAE Pipe
    Flange Size
    Dash
    Size
    Flanged Connection
    Surface
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Max. Pressure
    @ Temp.
    Each
    Flanged
    232O-Ring Groove1/2"0.531"43,000 psi @ 72° F1431N0320000000
     

    SAE High-Pressure Iron and Steel Unthreaded Pipe Flanges

    Create an access point in a high-pressure hydraulic fluid line with these flanges. They are also known as Code 61 SAE hydraulic flanges. To connect, bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are for use in noncorrosive environments.
    Machined Flanges
    Image of Product. Back (O-Ring Groove). Back orientation. Pipe and Fittings. SAE High-Pressure Iron and Steel Unthreaded Pipe Flanges, Machined Flanges, Socket-Connect Female, O-Ring Groove Surface.

    Back

    (O-Ring

    Groove)

    Dash
    Size
    Bolt
    Hole
    Pipe Size
    (A)
    SAE Pipe
    Flange Size (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Material
    Max. Pressure
    @ Temp.
    Each
    Socket-Connect Female
    3/4
    		3/41212O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N38000000
    1
    		11616O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N3900000
    1 1/2
    		1 1/22424O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N400000
    1 1/2
    		1 1/22424O-Ring Groove12 mm13 mm4Steel
    		3,000 psi @ 72° F2125N4400000
    2
    		23232O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N4100000
    2
    		23232O-Ring Groove12 mm13 mm4Steel
    		3,000 psi @ 72° F2125N4500000
     
    Machined Blind Flanges
    Image of Product. Back (O-Ring Groove). Back orientation. Pipe and Fittings. SAE High-Pressure Iron and Steel Unthreaded Pipe Flanges, Machined Blind Flanges, Flanged, O-Ring Groove.

    Back

    (O-Ring

    Groove)

    Bolt
    Hole
    SAE Pipe
    Flange Size
    Dash
    Size
    Flanged Connection
    Surface
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Material
    Max. Pressure
    @ Temp.
    Each
    Flanged
    3/412O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N5000000
    116O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N5100000
    1 1/224O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N5200000
    232O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N5300000
     

    SAE High-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges

    Combine an adapter with a two-piece pipe flange (sold separately) to build a customized flange connection. Also known as Code 61 split flanges, the two halves of the flange clamp around the adapter and bolt to another Code 61 flange. Flanges and adapters should be used in noncorrosive environments.
    Forged Flanges
    Image of System. Flange. Front orientation. Contains Annotated. Pipe and Fittings. SAE High-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges, Forged Flanges, Flanged, O-Ring Groove.

    Flange

    Forged flanges have better strength than cast flanges.
    Bolt
    Hole
    SAE Pipe
    Flange Size
    Dash
    Size
    Flanged Connection
    Surface
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Material
    Max. Pressure
    @ Temp.
    Each
    Flanged
    116O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N59000000
    116O-Ring Groove10 mm11 mm4Steel
    		3,000 psi @ 72° F2125N6300000
    1 1/224O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N600000
    1 1/224O-Ring Groove12 mm13 mm4Steel
    		3,000 psi @ 72° F2125N6400000
    232O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N6100000
    232O-Ring Groove12 mm13 mm4Steel
    		3,000 psi @ 72° F2125N6500000
     
    Machined Flange Adapters
    Image of System. Flange. Front orientation. Contains Annotated. Pipe and Fittings. SAE High-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges, Machined Flange Adapters, Flanged Fitting Connection, Threaded Fitting Connection, Female.

    Flange

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe Size
    (A)
    For SAE Pipe
    Flange Size (B)
    Dash Size
    (A)
    For Flanged Connection
    Surface
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female
    1
    		116O-Ring GrooveSteel
    		3,000 psi @ 72° F2125N79000000
    1 1/2
    		1 1/224O-Ring GrooveSteel
    		3,000 psi @ 72° F2125N8000000
    2
    		232O-Ring GrooveSteel
    		3,000 psi @ 72° F2125N81000000
     

    SAE High-Pressure Stainless Steel Threaded Pipe Flanges

    Also known as Code 61 SAE hydraulic flanges, these let you create an access point in a high-pressure hydraulic line. To connect, bolt flanges to equipment, or bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size.
    Machined Flanges
    Image of Product. O-Ring Groove Front. Front orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Threaded Pipe Flanges, Machined Flanges, Flanged Fitting Connection, Threaded Fitting Connection, Female, O-Ring Groove Surface.
    Image of Product. O-Ring Groove Back. Back orientation. Pipe and Fittings. SAE High-Pressure Stainless Steel Threaded Pipe Flanges, Machined Flanges, Flanged Fitting Connection, Threaded Fitting Connection, Female, O-Ring Groove Surface.

    O-Ring

    Groove

    Front

    O-Ring

    Groove Back

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    UN/UNF (SAE Straight) Thread—Also known as O-ring boss threads.
    316/316L Stainless Steel—Flanges are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel flanges, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Dash
    Size
    Bolt
    Hole
    316/316L
    Stainless Steel
    Pipe Size
    (A)
    Thread Size
    (A)
    SAE Pipe
    Flange Size (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Max. Pressure
    @ Temp.
    Each
    NPTF Female
    3/4
    		—3/41212O-Ring Groove3/8"0.406"42,500 psi @ 72° F1723N150000000
    1
    		—11616O-Ring Groove3/8"0.406"42,000 psi @ 72° F1723N16000000
    1 1/2
    		—1 1/22424O-Ring Groove1/2"0.531"41,000 psi @ 72° F1723N17000000
    2
    		—23232O-Ring Groove1/2"0.531"41,000 psi @ 72° F1723N18000000
     
    UN/UNF (SAE Straight) Female
    —1 5/16"-12
    		11616O-Ring Groove3/8"0.406"46,000 psi @ 72° F1723N29000000
     

    SAE High-Pressure Iron and Steel Threaded Pipe Flanges

    Also known as Code 61 SAE hydraulic flanges, these let you create an access point in a high-pressure hydraulic line. To connect, bolt flanges to equipment, or bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are for use in noncorrosive environments.
    Machined Flanges
    Image of Product. Back (O-Ring Groove). Back orientation. Pipe and Fittings. SAE High-Pressure Iron and Steel Threaded Pipe Flanges, Machined Flanges, Flanged Fitting Connection, Threaded Fitting Connection, Female, O-Ring Groove Surface.

    Back (O-Ring

    Groove)

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    UN/UNF (SAE Straight) Thread—Also known as O-ring boss threads.
    Dash
    Size
    Bolt
    Hole
    Pipe Size
    (A)
    Thread Size
    (A)
    SAE Pipe
    Flange Size (B)
    (A)
    (B)
    Flanged Connection
    Surface (B)
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female
    3/4
    		—3/41212O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N14000000
    1
    		—11616O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N1500000
    1
    		—11616O-Ring Groove10 mm10.5 mm4Steel
    		3,000 psi @ 72° F2125N1900000
    1 1/2
    		—1 1/22424O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N1600000
    2
    		—23232O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N1700000
    2
    		—23232O-Ring Groove12 mm13.3 mm4Steel
    		3,000 psi @ 72° F2125N2100000
     
    UN/UNF (SAE Straight) Female
    —1 5/16"-12
    		11616O-Ring Groove3/8"0.41"4Steel
    		3,000 psi @ 72° F2125N2700000
    —1 7/8"-12
    		1 1/22424O-Ring Groove12 mm13 mm4Steel
    		3,000 psi @ 72° F2125N3200000
    —1 7/8"-12
    		22432O-Ring Groove1/2"0.53"4Steel
    		3,000 psi @ 72° F2125N29000000
     

    Easy-Access CPVC Pipe Flanges for Chemicals

    The grooved ends on these flanges connect to pipe with a clamp, so you can access your chemical process line for routine maintenance. They are also known as Victaulic flanges. Bolt two same-size flanges together with a gasket (sold separately). Flanges are CPVC, which has excellent chemical resistance to withstand a variety of salt solutions, acids, and other harsh substances. They are comparable to Corzan. Flanges meet ASTM D1784 specifications and testing requirements for material quality.
    Warning: Never use plastic pipe fittings, flanges, and pipe with compressed air or gas.
    Flanges
    Image of Product. Front. Front orientation. Pipe and Fittings. Easy-Access CPVC Pipe Flanges for Chemicals.
    Image of Product. Raised Surface on Back. Back orientation. Pipe and Fittings. Easy-Access CPVC Pipe Flanges for Chemicals.

    Front

    Raised Surface on Back

    Pipe
    Size
    Bolt
    Hole
    (A)
    (B)
    Flanged Connection
    Surface (B)
    Flange
    OD
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Bolt Circle
    Dia.
    Material
    Color
    Max. Pressure
    @ Temp.
    Each
    Grooved-End Clamp-On Male
    2
    		2
    		Raised6"5/8"3/4"44 3/4"CPVCLight Gray150 psi @ 72° F2663N210000000
    3
    		3
    		Raised7 1/2"5/8"3/4"46"CPVCLight Gray150 psi @ 72° F2663N22000000
    4
    		4
    		Raised9"5/8"3/4"87 1/2"CPVCLight Gray150 psi @ 72° F2663N23000000
     

    SAE Extreme-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges

    Combine an adapter with a two-piece pipe flange (sold separately) to build a customized flange connection. Also known as Code 62 split flanges, the two halves of the flange clamp around the adapter and bolt to another Code 62 flange. Flanges and adapters should be used in noncorrosive environments.
    Forged Flanges
    Image of System. Flange. Front orientation. Contains Annotated. Pipe and Fittings. SAE Extreme-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges, Forged Flanges, Flanged, O-Ring Groove.

    Flange

    Forged flanges have better strength than cast flanges.
    Bolt
    Hole
    SAE Pipe
    Flange Size
    Dash
    Size
    Flanged Connection
    Surface
    For Bolt
    Dia.
    Dia.
    No.
    Of
    Material
    Max. Pressure
    @ Temp.
    Each
    Flanged
    3/412O-Ring Groove3/8"0.41"4Steel
    		6,000 psi @ 72° F2125N66000000
    3/412O-Ring Groove10 mm11 mm4Steel
    		6,000 psi @ 72° F2125N7100000
    116O-Ring Groove0.438"0.47"4Steel
    		6,000 psi @ 72° F2125N6700000
    116O-Ring Groove12 mm13 mm4Steel
    		6,000 psi @ 72° F2125N7200000
    1 1/224O-Ring Groove5/8"0.66"4Steel
    		6,000 psi @ 72° F2125N6800000
    1 1/224O-Ring Groove16 mm17 mm4Steel
    		6,000 psi @ 72° F2125N700000
    232O-Ring Groove3/4"0.78"4Steel
    		6,000 psi @ 72° F2125N69000000
    232O-Ring Groove20 mm21 mm4Steel
    		6,000 psi @ 72° F2125N73000000
     
    Machined Flange Adapters
    Image of System. Flange. Front orientation. Contains Annotated. Pipe and Fittings. SAE Extreme-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges, Machined Flange Adapters, Flanged Fitting Connection, Threaded Fitting Connection, Female.

    Flange

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Pipe Size
    (A)
    For SAE Pipe
    Flange Size (B)
    Dash Size
    (A)
    For Flanged Connection
    Surface
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female
    3/4
    		3/412O-Ring GrooveSteel
    		6,000 psi @ 72° F2125N86000000
    1
    		116O-Ring GrooveSteel
    		6,000 psi @ 72° F2125N8700000
    1 1/2
    		1 1/224O-Ring GrooveSteel
    		6,000 psi @ 72° F2125N88000000
    2
    		232O-Ring GrooveSteel
    		6,000 psi @ 72° F2125N89000000
     
    back to top