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)
    63 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.

    Medium-Pressure Aluminum Butt-Weld Pipe Fittings

    Also known as Schedule 40 fittings, these have thicker walls than our thin-wall aluminum unthreaded pipe fittings. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. Fittings are lightweight with good corrosion resistance.
    90° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Medium-Pressure Aluminum Butt-Weld Pipe Fittings, 90° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pipe
    Schedule
    Material
    Each
    Butt Weld
    1/2
    		Seamless27/32"40
    		6061 Aluminum43485K1190000000
    3/4
    		Seamless1 3/64"40
    		6061 Aluminum43485K121000000
    1
    		Seamless1 5/16"40
    		6061 Aluminum43485K122000000
    1 1/4
    		Seamless1 21/32"40
    		6061 Aluminum43485K123000000
    1 1/2
    		Seamless1 29/32"40
    		6061 Aluminum43485K124000000
    2
    		Seamless2 3/8"40
    		6061 Aluminum43485K125000000
    2 1/2
    		Seamless2 7/8"40
    		6061 Aluminum43485K126000000
    3
    		Seamless3 1/2"40
    		6061 Aluminum43485K127000000
    4
    		Seamless4 1/2"40
    		6061 Aluminum43485K131000000
     
    45° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Medium-Pressure Aluminum Butt-Weld Pipe Fittings, 45° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pipe
    Schedule
    Material
    Each
    Butt Weld
    1/2
    		Seamless27/32"40
    		6061 Aluminum43485K149000000
    3/4
    		Seamless1 3/64"40
    		6061 Aluminum43485K15100000
    1
    		Seamless1 5/16"40
    		6061 Aluminum43485K15200000
    1 1/4
    		Seamless1 21/32"40
    		6061 Aluminum43485K153000000
    1 1/2
    		Seamless1 29/32"40
    		6061 Aluminum43485K15400000
    2
    		Seamless2 3/8"40
    		6061 Aluminum43485K15500000
    2 1/2
    		Seamless2 7/8"40
    		6061 Aluminum43485K156000000
    3
    		Seamless3 1/2"40
    		6061 Aluminum43485K157000000
    4
    		Seamless4 1/2"40
    		6061 Aluminum43485K161000000
     

    Low-Pressure Aluminum Socket-Connect Pipe Fittings

    Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings are aluminum, which is lightweight with good corrosion resistance.
    90° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Socket-Connect Pipe Fittings, 90° Elbow Connectors, Socket Connect.

    Socket Connect

    Pipe
    Size
    Pipe
    Schedule
    Material
    Each
    Socket Connect
    1/2
    		10
    		6061 Aluminum4657T11000000
    3/4
    		10
    		6061 Aluminum4657T1200000
    1
    		10
    		6061 Aluminum4657T1300000
    1 1/2
    		10
    		6061 Aluminum4657T1400000
    2
    		10
    		6061 Aluminum4657T15000000
    2 1/2
    		10
    		6061 Aluminum4657T16000000
    3
    		10
    		6061 Aluminum4657T17000000
    4
    		10
    		6061 Aluminum4657T18000000
     
    45° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Socket-Connect Pipe Fittings, 45° Elbow Connectors, Socket Connect.

    Socket Connect

    Pipe
    Size
    Pipe
    Schedule
    Material
    Each
    Socket Connect
    1/2
    		10
    		6061 Aluminum4657T31000000
    3/4
    		10
    		6061 Aluminum4657T3200000
    1
    		10
    		6061 Aluminum4657T3300000
    1 1/2
    		10
    		6061 Aluminum4657T3400000
    2
    		10
    		6061 Aluminum4657T3500000
    3
    		10
    		6061 Aluminum4657T37000000
    4
    		10
    		6061 Aluminum4657T38000000
     

    Low-Pressure Aluminum Butt-Weld Pipe Fittings

    Also known as Schedule 10 fittings, these are the thinnest aluminum pipe fittings we offer. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. Fittings are lightweight and have good corrosion resistance.
    90° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Butt-Weld Pipe Fittings, 90° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pipe
    Schedule
    Material
    Each
    Butt Weld
    1/2
    		Seamless27/32"10
    		6061 Aluminum4672T110000000
    3/4
    		Seamless1 3/64"10
    		6061 Aluminum4672T6700000
    1
    		Seamless1 5/16"10
    		6061 Aluminum4672T1300000
    1 1/4
    		Seamless1 21/32"10
    		6061 Aluminum4672T14000000
    1 1/2
    		Seamless1 29/32"10
    		6061 Aluminum4672T1500000
    2
    		Seamless2 3/8"10
    		6061 Aluminum4672T16000000
    2 1/2
    		Seamless2 7/8"10
    		6061 Aluminum4672T17000000
    3
    		Seamless3 1/2"10
    		6061 Aluminum4672T18000000
    4
    		Seamless4 1/2"10
    		6061 Aluminum4672T19000000
     
    45° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Butt-Weld Pipe Fittings, 45° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pipe
    Schedule
    Material
    Each
    Butt Weld
    3/4
    		Seamless1 3/64"10
    		6061 Aluminum4672T680000000
    1
    		Seamless1 5/16"10
    		6061 Aluminum4672T23000000
    1 1/4
    		Seamless1 21/32"10
    		6061 Aluminum4672T24000000
    1 1/2
    		Seamless1 29/32"10
    		6061 Aluminum4672T25000000
    2
    		Seamless2 3/8"10
    		6061 Aluminum4672T26000000
    2 1/2
    		Seamless2 7/8"10
    		6061 Aluminum4672T27000000
    3
    		Seamless3 1/2"10
    		6061 Aluminum4672T28000000
    4
    		Seamless4 1/2"10
    		6061 Aluminum4672T29000000
     

    High-Pressure Aluminum Butt-Weld Pipe Fittings

    Thick walls give these Schedule 80 fittings excellent strength. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. Fittings are aluminum, which is lightweight with good corrosion resistance.
    90° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. High-Pressure Aluminum Butt-Weld Pipe Fittings, 90° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pipe
    Schedule
    Material
    Each
    Butt Weld
    1/2
    		Seamless27/32"80
    		6061 Aluminum4684T110000000
    3/4
    		Seamless1 3/64"80
    		6061 Aluminum4684T12000000
    1
    		Seamless1 5/16"80
    		6061 Aluminum4684T13000000
    1 1/4
    		Seamless1 21/32"80
    		6061 Aluminum4684T14000000
    1 1/2
    		Seamless1 29/32"80
    		6061 Aluminum4684T15000000
    2
    		Seamless2 3/8"80
    		6061 Aluminum4684T16000000
    2 1/2
    		Seamless2 7/8"80
    		6061 Aluminum4684T17000000
    3
    		Seamless3 1/2"80
    		6061 Aluminum4684T18000000
    4
    		Seamless4 1/2"80
    		6061 Aluminum4684T19000000
     
    45° Elbow Connectors
    Image of Product. Front orientation. Pipe and Fittings. High-Pressure Aluminum Butt-Weld Pipe Fittings, 45° Elbow Connectors, Butt Weld.

    Butt Weld

    Pipe
    Size
    Construction
    OD
    Pipe
    Schedule
    Material
    Each
    Butt Weld
    1 1/2
    		Seamless1 29/32"80
    		6061 Aluminum4684T250000000
    2
    		Seamless2 3/8"80
    		6061 Aluminum4684T26000000
    3
    		Seamless3 1/2"80
    		6061 Aluminum4684T28000000
    4
    		Seamless4 1/2"80
    		6061 Aluminum4684T29000000
     
    back to top