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)
    48 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

    Threading

    Standard-Wall Copper Unthreaded Pipe Nipples and Pipe

    Designed for salt water applications, this pipe is made of copper-nickel, which has excellent resistance to stress cracking and better corrosion resistance than most stainless steel alloys. Pipe is also known as Pressure Class 200 pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak.
    Pipe—Unthreaded
    Image of Product. Male. Front orientation. Pipe and Fittings. Standard-Wall Copper Unthreaded Pipe Nipples and Pipe, Pipe—Unthreaded, Butt Weld/Socket Connect/Weld Socket Male.

    Male

    Seamless—Pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.
    Lg.,
    ft.
    Construction
    Pressure
    Class
    Material
    Certification
    Each
    Butt Weld/Socket Connect/Weld Socket Male
     
    1 Pipe Size
    1Seamless200
    		Copper NickelMil. Spec.
    		1946K31000000
    3Seamless200
    		Copper NickelMil. Spec.
    		1946K37000000
    6Seamless200
    		Copper NickelMil. Spec.
    		1946K44000000
     
    1 1/2 Pipe Size
    1Seamless200
    		Copper NickelMil. Spec.
    		1946K3200000
    3Seamless200
    		Copper NickelMil. Spec.
    		1946K38000000
    6Seamless200
    		Copper NickelMil. Spec.
    		1946K45000000
     
    2 Pipe Size
    1Seamless200
    		Copper NickelMil. Spec.
    		1946K33000000
    3Seamless200
    		Copper NickelMil. Spec.
    		1946K39000000
    6Seamless200
    		Copper NickelMil. Spec.
    		1946K46000000
     
    2 1/2 Pipe Size
    1Seamless200
    		Copper NickelMil. Spec.
    		1946K34000000
    3Seamless200
    		Copper NickelMil. Spec.
    		1946K41000000
    6Seamless200
    		Copper NickelMil. Spec.
    		1946K47000000
     
    3 Pipe Size
    1Seamless200
    		Copper NickelMil. Spec.
    		1946K35000000
    3Seamless200
    		Copper NickelMil. Spec.
    		1946K42000000
    6Seamless200
    		Copper NickelMil. Spec.
    		1946K48000000
     
    4 Pipe Size
    1Seamless200
    		Copper NickelMil. Spec.
    		1946K36000000
    3Seamless200
    		Copper NickelMil. Spec.
    		1946K43000000
    6Seamless200
    		Copper NickelMil. Spec.
    		1946K4900000000
     

    Standard-Wall Copper Threaded Pipe Nipples and Pipe

    Made of copper-nickel, this Schedule 40 pipe has excellent resistance to stress cracking and has better corrosion resistance than most stainless steel alloys. It is often used in highly-corrosive environments, such as salt water applications. Also known as a close nipple, it is threaded on both ends to the center.
    Pipe—Fully Threaded
    Image of Product. Male. Front orientation. Pipe and Fittings. Standard-Wall Copper Threaded Pipe Nipples and Pipe, Pipe—Fully Threaded, Threaded Fitting Connection, Male.

    Male

    Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
    Seamless—Pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.
    Pipe
    Size
    Lg.
    Construction
    Pipe
    Schedule
    Material
    Each
    NPT Male
    1/4
    		7/8"Seamless40
    		Copper Nickel2626K17000000
    1/2
    		1 1/8"Seamless40
    		Copper Nickel2626K1800000
    3/4
    		1 3/8"Seamless40
    		Copper Nickel2626K1900000
     

    Low-Pressure Copper Butt-Weld Pipe Fittings

    Fittings weld flush against pipe, creating a strong connection that permits maximum flow. Fittings are also known as Pressure Class 200 fittings. They are copper-nickel, which has excellent resistance to stress cracking and better corrosion resistance than most stainless steel alloys. They are often used in highly-corrosive environments, such as salt water applications.
    Short 90° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Copper Butt-Weld Pipe Fittings, Short 90° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pressure
    Class
    Material
    Certification
    Each
    Butt Weld
    1
    		Welded1 5/16"200
    		Copper NickelMil. Spec.
    		1946K17000000
    1 1/2
    		Welded1 29/32"200
    		Copper NickelMil. Spec.
    		1946K18000000
    2
    		Welded2 3/8"200
    		Copper NickelMil. Spec.
    		1946K19000000
    2 1/2
    		Welded2 7/8"200
    		Copper NickelMil. Spec.
    		1946K21000000
    3
    		Welded3 1/2"200
    		Copper NickelMil. Spec.
    		1946K22000000
    4
    		Welded4 1/2"200
    		Copper NickelMil. Spec.
    		1946K23000000
     
    Long 90° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Copper Butt-Weld Pipe Fittings, Long 90° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pressure
    Class
    Material
    Certification
    Each
    Butt Weld
    1
    		Welded1 5/16"200
    		Copper NickelMil. Spec.
    		1946K11000000
    1 1/2
    		Welded1 29/32"200
    		Copper NickelMil. Spec.
    		1946K12000000
    2
    		Welded2 3/8"200
    		Copper NickelMil. Spec.
    		1946K13000000
    2 1/2
    		Welded2 7/8"200
    		Copper NickelMil. Spec.
    		1946K14000000
    3
    		Welded3 1/2"200
    		Copper NickelMil. Spec.
    		1946K15000000
    4
    		Welded4 1/2"200
    		Copper NickelMil. Spec.
    		1946K16000000
     
    45° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Copper Butt-Weld Pipe Fittings, 45° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pressure
    Class
    Material
    Certification
    Each
    Butt Weld
    1
    		Welded1 5/16"200
    		Copper NickelMil. Spec.
    		1946K24000000
    1 1/2
    		Welded1 29/32"200
    		Copper NickelMil. Spec.
    		1946K2500000
    2
    		Welded2 3/8"200
    		Copper NickelMil. Spec.
    		1946K26000000
    2 1/2
    		Welded2 7/8"200
    		Copper NickelMil. Spec.
    		1946K27000000
    3
    		Welded3 1/2"200
    		Copper NickelMil. Spec.
    		1946K28000000
    4
    		Welded4 1/2"200
    		Copper NickelMil. Spec.
    		1946K29000000
     

    Low-Pressure Copper Threaded Pipe Fittings

    Made of copper-nickel, these fittings have excellent resistance to stress cracking and have better corrosion resistance than most stainless steel alloys. They are often used in highly-corrosive environments, such as salt water applications.
    Straight Connectors
    Image of Product. Female. Front orientation. Pipe and Fittings. Low-Pressure Copper Threaded Pipe Fittings, Straight Connectors, Threaded Fitting Connection, Female.

    Female

    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female
    1/4
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K21000000
    1/2
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K2200000
    3/4
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K2300000
     
    90° Elbow Connectors
    Image of Product. Female. Front orientation. Pipe and Fittings. Low-Pressure Copper Threaded Pipe Fittings, 90° Elbow Connectors, Threaded Fitting Connection, Female.

    Female

    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female
    1/4
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K11000000
    1/2
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K12000000
    3/4
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K13000000
     
    Tee Connectors
    Image of Product. Female. Front orientation. Pipe and Fittings. Low-Pressure Copper Threaded Pipe Fittings, Tee Connectors, Threaded Fitting Connection, Female.

    Female

    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female
    1/4
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K14000000
    1/2
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K15000000
    3/4
    		Copper Nickel400 psi @ 72° F200 psi @ 425° F2626K16000000
     
    back to top