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    17 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 Locknuts

    Image of Product. Front orientation. Pipe Locknuts. Low-Pressure Iron and Steel Threaded Pipe Locknuts.
    Use these locknuts for low-pressure applications in noncorrosive environments.
    Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
    NPTF (Dryseal) threads, NPSC (National Pipe Straight Coupling) threads, and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
    For Pipe
    Pipe
    Size
    Hex Wd.
    Lg.
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    For Use With
    Pressure
    Class
    Material
    Schedule
    Material
    For Flange
    Material
    Specs. Met
    Each
    NPSL Female
    1/8
    		11/16"3/16"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Steel40
    		SteelIron, SteelASME B16.1444605K43300000
    1/4
    		27/32"1/4"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Steel40
    		SteelIron, SteelASME B16.1444605K4340000
    3/8
    		1"9/32"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K2110000
    1/2
    		1 3/16"5/16"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K2120000
    3/4
    		1 7/16"11/32"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K2130000
    1
    		1 3/4"3/8"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K21400000
    1 1/4
    		2 3/32"27/64"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K2150000
    1 1/2
    		2 11/32"15/32"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K21600000
    2
    		2 7/8"17/32"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Iron40
    		SteelIron, SteelASME B16.1444605K21700000
     

    Low-Pressure Galvanized Iron and Steel Threaded Pipe Locknuts

    Image of Product. Front orientation. Pipe Locknuts. Low-Pressure Galvanized Iron and Steel Threaded Pipe Locknuts.
    The galvanized finish on these locknuts provides fair corrosion resistance. Locknuts are for use in low-pressure applications.
    Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
    NPSL Thread—NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
    For Pipe
    For
    Flange
    Pipe
    Size
    Hex Wd.
    Lg.
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    For Use With
    Pressure
    Class
    Material
    Schedule
    Material
    Class
    Material
    Specs. Met
    Each
    NPSL Female
    1/4
    		27/32"1/4"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K61200000
    3/8
    		1"0.28"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K6130000
    1/2
    		1 3/16"0.31"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K6140000
    3/4
    		1 7/16"0.34"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K6150000
    1
    		1 3/4"0.38"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K61600000
    1 1/4
    		2 3/32"0.42"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K61700000
    1 1/2
    		2 11/32"0.47"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K61800000
    2
    		2 7/8"0.53"Not RatedNot RatedAir, Natural Gas, Oil, Steam, Water150
    		Galvanized Iron40
    		Galvanized Steel150
    		Galvanized SteelASME B16.144638K61900000
     
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