McMaster-Carr logo
    Filter by
    Fitting Type
    Industrial Info Snippet
    System of Measurement
    Thread Type
    Pipe Schedule
    Industrial Info Snippet
    Body Shape
    Gender
    Maximum Pressure @ Temperature
    Industrial Info Snippet
    Fitting Connection
    DFARS Specialty Metals
    Connects To
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Compare
    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)
    31 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.

    Low-Pressure Iron and Steel Threaded Pipe Fittings

    Use these fittings for low-pressure applications in noncorrosive environments.
    External-Square-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Fittings, External-Square-Drive Plugs, Male, Threaded Fitting Connection, Square Body.

    Male

    Pipe
    Size
    Construction
    Pressure
    Class
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    NPT Male
    1/8
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K92100000
    1/4
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K2220000
    3/8
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K2230000
    1/2
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K2240000
    3/4
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K2250000
    1
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K6630000
    1 1/4
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K6640000
    1 1/2
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K66500000
    2
    		SolidNot RatedSquareSteel
    		Not RatedNot Rated44605K66600000
     
    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
    1/2
    		Iron150 psi @ 72° F150 psi @ 350° FUL Listed
    		180° Bend44605K563000000
    3/4
    		Iron150 psi @ 72° F150 psi @ 350° FUL Listed
    		180° Bend44605K56400000
    1
    		Iron150 psi @ 72° F150 psi @ 350° F—180° Bend44605K56500000
    1 1/4
    		Iron150 psi @ 72° F150 psi @ 350° FUL Listed
    		180° Bend44605K56600000
    1 1/2
    		Iron150 psi @ 72° F150 psi @ 350° FUL Listed
    		180° Bend44605K567000000
    2
    		Iron150 psi @ 72° F150 psi @ 350° FUL Listed
    		180° Bend44605K568000000
     
    Locknuts
    Image of Product. Front orientation. Pipe Locknuts.
    NPSL Thread—NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
    Pipe
    Size
    Finished
    Material
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    NPSL Female
    1/4
    		Steel
    		Not RatedNot Rated44605K43400000
    3/8
    		IronNot RatedNot Rated44605K2110000
    1/2
    		IronNot RatedNot Rated44605K2120000
    3/4
    		IronNot RatedNot Rated44605K2130000
    1
    		IronNot RatedNot Rated44605K21400000
    1 1/4
    		IronNot RatedNot Rated44605K2150000
    1 1/2
    		IronNot RatedNot Rated44605K21600000
    2
    		IronNot RatedNot Rated44605K21700000
     

    Medium-Pressure Stainless Steel Threaded Pipe Fittings

    Choose these fittings when you want the same high-quality found in our low-pressure pipe fittings, but need more strength to handle higher pressures.
    External-Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Medium-Pressure Stainless Steel Threaded Pipe Fittings, External-Hex-Drive Plugs, Male, Threaded Fitting Connection, Hex Body.

    Male

    Alloy 20 Stainless Steel—These fittings have the best corrosion resistance of all the stainless steel fittings we offer. Alloy 20 stainless steel is also known as Carpenter 20 and resists cracking from stress and corrosion.
    Alloy 20
    Stainless Steel
    Pipe
    Size
    Construction
    Pressure
    Class
    Body
    Shape
    Each
    NPT Male
    1/8
    		SolidNot RatedHex2698K2140000000
    1/4
    		SolidNot RatedHex2698K215000000
    3/8
    		SolidNot RatedHex2698K216000000
    1/2
    		SolidNot RatedHex2698K211000000
    3/4
    		SolidNot RatedHex2698K212000000
    1
    		SolidNot RatedHex2698K213000000
    1 1/2
    		SolidNot RatedHex2698K217000000
    2
    		SolidNot RatedHex2698K218000000
     
    back to top