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    239 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.

    Performance

    Threading

    Low-Pressure Stainless Steel Threaded Pipe Fittings

    Use these fittings in a low-pressure pipe line.
    Straight Adapters
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    304 Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    304 Stainless Steel
    316 Stainless Steel
    (A)
    (B)
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Female × Butt

    Weld

    1/8
    		1/8
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K36400000300 psi @ 72° F150 psi @ 350° F4452K13800000
    1/4
    		1/4
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K4710000300 psi @ 72° F150 psi @ 350° F4452K1390000
    3/8
    		3/8
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K4720000300 psi @ 72° F150 psi @ 350° F4452K2110000
    1/2
    		1/2
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K4730000300 psi @ 72° F150 psi @ 350° F4452K2120000
    3/4
    		3/4
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K4740000300 psi @ 72° F150 psi @ 350° F4452K2130000
    1
    		1
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K4750000300 psi @ 72° F150 psi @ 350° F4452K2140000
    1 1/4
    		1 1/4
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K47600000300 psi @ 72° F150 psi @ 350° F4452K21500000
    1 1/2
    		1 1/2
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K47700000300 psi @ 72° F150 psi @ 350° F4452K21600000
    2
    		2
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K47800000300 psi @ 72° F150 psi @ 350° F4452K21700000
    2 1/2
    		2 1/2
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K47900000300 psi @ 72° F150 psi @ 350° F4452K21800000
    3
    		3
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K48100000300 psi @ 72° F150 psi @ 350° F4452K21900000
    4
    		4
    		150
    		300 psi @ 72° F150 psi @ 350° F4464K48200000300 psi @ 72° F150 psi @ 350° F4452K221000000
     
    BSPT Female × Butt Weld
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters, Butt-Weld Fitting Connection, Threaded Fitting Connection, Female.

    Female × Butt

    Weld

    1/8
    		1/8
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T2410000—————0
    1/4
    		1/4
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T2420000—————0
    3/8
    		3/8
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T2430000—————0
    1/2
    		1/2
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T2440000—————0
    3/4
    		3/4
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T2450000—————0
    1
    		1
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T24600000—————0
    1 1/2
    		1 1/2
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T24700000—————0
    2
    		2
    		150
    		300 psi @ 72° F150 psi @ 350° F4810T24800000—————0
     
    Straight Adapters for Tanks
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters for Tanks, Threaded Fitting Connection, Female, Butt-Weld Fitting Connection, For Curved Tank Surfaces.

    Female × Butt

    Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    316/316L Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    316/316L Stainless Steel
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    OD (B)
    For Tank
    Surface (B)
    Max. Pressure
    @ Temp.
    Each
    NPTF Female × Butt Weld
    3/4
    		1 1/8"2 3/8"20"CurvedNot Rated1698T31000000
    1
    		1 3/8"2 5/16"20"CurvedNot Rated1698T3200000
    1 1/2
    		2 1/16"3 1/4"21"CurvedNot Rated1698T3300000
     
    Straight Adapters with Extension for Tanks
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters with Extension for Tanks, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female, For Flat Tank Surfaces.

    Female × Butt Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    316 Stainless Steel
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    Surface (B)
    Max. Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/4
    		15/16"1 1/2"FlatNot Rated1145K51000000
    3/8
    		15/16"1 1/2"FlatNot Rated1145K5200000
    1/2
    		1 1/8"1 3/4"FlatNot Rated1145K5300000
    3/4
    		1 3/8"2 1/8"FlatNot Rated1145K5400000
    1
    		1 11/16"2 3/8"FlatNot Rated1145K5500000
    1 1/4
    		2"2 11/16"FlatNot Rated1145K5600000
    1 1/2
    		2 1/4"3"FlatNot Rated1145K5700000
    2
    		2 5/8"3 1/2"FlatNot Rated1145K5800000
    2 1/2
    		3 3/16"4 1/16"FlatNot Rated1145K59000000
    3
    		3 11/16"4 5/8"FlatNot Rated1145K61000000
    4
    		4 7/8"5 3/4"FlatNot Rated1145K62000000
     

    Low-Pressure Iron and Steel Threaded Pipe Fittings

    Use these fittings for low-pressure applications in noncorrosive environments.
    Straight Adapters for Tanks
    Image of Product. Female × Butt Weld (For Curved Surface). Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters for Tanks, Female, Threaded Fitting Connection, Butt-Weld Fitting Connection, For Curved Tank Surfaces.
    Image of Product. Female × Butt Weld (For Flat Surface). Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters for Tanks, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female, For Flat Tank Surfaces.

    Female × Butt Weld

    (For Curved Surface)

    Female × Butt Weld

    (For Flat Surface)

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    NPSC Thread—NPSC (National Pipe Straight Coupling) threads are compatible with NPT threads.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    OD (B)
    For Tank
    Surface (B)
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/4
    		3/4"1 1/4"—FlatCarbon SteelNot Rated12555K5100000
    3/8
    		15/16"1 1/4"—FlatCarbon SteelNot Rated12555K5200000
    1/2
    		1 1/8"1 1/2"—FlatCarbon SteelNot Rated12555K530000
    3/4
    		1 3/8"1 3/4"—FlatCarbon SteelNot Rated12555K540000
    1
    		1 11/16"2 1/8"—FlatCarbon SteelNot Rated12555K550000
    1 1/4
    		2"2 1/2"—FlatCarbon SteelNot Rated12555K560000
    1 1/2
    		2 3/8"3"—FlatCarbon SteelNot Rated12555K5700000
    2
    		2 7/8"3 1/2"—FlatCarbon SteelNot Rated12555K5800000
    2 1/2
    		3 1/2"4 1/4"—FlatCarbon SteelNot Rated12555K5900000
    3
    		4 1/8"4 3/4"—FlatCarbon SteelNot Rated12555K6100000
    4
    		5 1/8"5 3/4"—FlatCarbon SteelNot Rated12555K6200000
     
    NPTF Female × Butt Weld
    3/4
    		1 1/8"2 3/16"20"CurvedSteelNot Rated1698T110000
     
    NPSC Female × Butt Weld
    1 1/4
    		1 11/16"2 13/16"36"CurvedSteelNot Rated1698T120000
    1 1/2
    		1 15/16"3 1/4"36"CurvedSteelNot Rated1698T130000
    2
    		2 7/16"3 11/16"26 1/2"CurvedSteelNot Rated1698T140000
     
    Straight Adapters with Extension for Tanks
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters with Extension for Tanks, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female, For Flat Tank Surfaces.

    Female × Butt Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    Surface (B)
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/8
    		15/16"1 5/16"FlatCarbon SteelNot Rated12555K7900000
    1/8
    		15/16"1 1/2"FlatCarbon SteelNot Rated12555K690000
    1/4
    		15/16"1 5/16"FlatCarbon SteelNot Rated12555K810000
    1/4
    		15/16"1 1/2"FlatCarbon SteelNot Rated12555K710000
    3/8
    		15/16"1 5/16"FlatCarbon SteelNot Rated12555K820000
    3/8
    		15/16"1 1/2"FlatCarbon SteelNot Rated12555K720000
    1/2
    		1 1/8"1 5/8"FlatCarbon SteelNot Rated12555K830000
    1/2
    		1 1/8"1 3/4"FlatCarbon SteelNot Rated12555K730000
    3/4
    		1 5/16"1 15/16"FlatCarbon SteelNot Rated12555K840000
    3/4
    		1 3/8"2 1/8"FlatCarbon SteelNot Rated12555K740000
    1
    		1 5/8"2 3/8"FlatCarbon SteelNot Rated12555K750000
    1
    		1 11/16"2 1/4"FlatCarbon SteelNot Rated12555K850000
    1 1/4
    		2"2 9/16"FlatCarbon SteelNot Rated12555K8600000
    1 1/4
    		2"2 11/16"FlatCarbon SteelNot Rated12555K760000
    1 1/2
    		2 1/4"2 13/16"FlatCarbon SteelNot Rated12555K870000
    1 1/2
    		2 1/4"3"FlatCarbon SteelNot Rated12555K770000
    2
    		2 5/8"3 3/8"FlatCarbon SteelNot Rated12555K880000
    2
    		2 5/8"3 1/2"FlatCarbon SteelNot Rated12555K7800000
    2 1/2
    		3 1/8"4 1/16"FlatCarbon SteelNot Rated12555K8900000
    3
    		3 5/8"4 5/8"FlatCarbon SteelNot Rated12555K9100000
    4
    		4 11/16"5 13/16"FlatCarbon SteelNot Rated12555K9200000
     
    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
     

    Low-Pressure Aluminum Threaded Pipe Fittings

    In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.
    Straight Adapters for Tanks
    Image of Product. NPTF Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Threaded Pipe Fittings, Straight Adapters for Tanks, Female, Threaded Fitting Connection, Butt-Weld Fitting Connection, For Curved Tank Surfaces.

    NPTF Female ×

    Butt Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    OD (B)
    For Tank
    Surface (B)
    Material
    Max. Pressure
    @ Temp.
    Each
    NPTF Female × Butt Weld
    1 1/4
    		1 3/4"2 13/16"36"Curved6061 AluminumNot Rated1698T2100000
    1 1/2
    		2"3 1/4"36"Curved6061 AluminumNot Rated1698T220000
     
    Straight Adapters with Extension for Tanks
    Image of Product. NPT Female × Butt Weld. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Threaded Pipe Fittings, Straight Adapters with Extension for Tanks, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female, For Flat Tank Surfaces.

    NPT Female × Butt

    Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Pipe
    Size
    For Hole
    Diameter (B)
    OD
    For Tank
    Surface (B)
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/8
    		7/8"1 5/16"Flat6061 AluminumNot Rated8694T4100000
    1/4
    		7/8"1 5/16"Flat6061 AluminumNot Rated8694T4200000
    3/8
    		1 3/16"1 7/16"Flat6061 AluminumNot Rated8694T4300000
    1/2
    		1 1/8"1 5/8"Flat6061 AluminumNot Rated8694T4400000
    3/4
    		1 5/16"2"Flat6061 AluminumNot Rated8694T4500000
    1
    		1 11/16"2 1/4"Flat6061 AluminumNot Rated8694T4600000
    1 1/4
    		1 15/16"2 9/16"Flat6061 AluminumNot Rated8694T4700000
    1 1/2
    		2 1/4"2 15/16"Flat6061 AluminumNot Rated8694T4800000
    2
    		2 5/8"3 3/8"Flat6061 AluminumNot Rated8694T4900000
    3
    		3 11/16"4 5/8"Flat6061 AluminumNot Rated8694T51000000
    4
    		4 3/4"5 13/16"Flat6061 AluminumNot Rated8694T52000000
     
    180° Bend Connectors
    Image of Product. Front orientation. Pipe Traps. Low-Pressure Aluminum Threaded Pipe Fittings.
    180° bend connectors are also known as U-bends.
    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Shape
    Each
    NPT Female
    1/2
    		356 Aluminum150 psi @ 72° F180° Bend44705K479000000
    3/4
    		356 Aluminum150 psi @ 72° F180° Bend44705K48100000
    1
    		356 Aluminum150 psi @ 72° F180° Bend44705K48200000
     

    High-Pressure Iron and Steel Threaded Pipe Fittings

    These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
    Note: The maximum pressure listed for Class 3000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
    Straight Adapters
    Image of Product. Threaded NPT Female × Butt Weld. Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Threaded NPT

    Female × Butt Weld

    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Zinc-Phosphate-Coated Steel—A phosphate coating offers some corrosion resistance, but these fittings aren't intended for corrosive environments.
    Pipe
    Size
    Dash
    Size
    (A)
    (B)
    (A)
    (B)
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/8
    		1/8
    		02023000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K27100000
    1/4
    		1/4
    		04043000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K710000
    3/8
    		3/8
    		06063000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K720000
    1/2
    		1/2
    		08083000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K730000
    3/4
    		3/4
    		12123000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K740000
    1
    		1
    		16163000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K750000
    1 1/4
    		1 1/4
    		20203000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K760000
    1 1/2
    		1 1/2
    		24243000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K770000
    2
    		2
    		32323000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K7800000
    2 1/2
    		2 1/2
    		40403000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K27200000
    3
    		3
    		48483000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K27300000
    4
    		4
    		64643000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K27400000
     
    Straight Adapters for Tanks
    Image of Product. Threaded NPT Female × Butt Weld. Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters for Tanks, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female, For Flat Tank Surfaces.

    Threaded NPT

    Female × Butt

    Weld

    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Zinc-Phosphate-Coated Steel—A phosphate coating offers some corrosion resistance, but these fittings aren't intended for corrosive environments.
    Pipe
    Size
    Dash
    Size
    OD
    For Tank
    Surface (B)
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/4
    		041"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K41100000
    3/8
    		061 3/16"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K4120000
    1/2
    		081 1/4"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K4130000
    3/4
    		121 1/2"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K4140000
    1
    		161 3/4"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K4150000
    1 1/4
    		202 1/4"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K41600000
    1 1/2
    		242 1/2"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K41700000
    2
    		323"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K41800000
    2 1/2
    		403 5/8"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K41900000
    3
    		484 1/4"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K42100000
    4
    		645 1/2"Flat3000
    		Zinc-Phosphate-Coated Steel3,000 psi @ 72° F300 psi @ 360° F4513K42200000
     

    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.
    Straight Adapters
    Image of Product. Female x Butt Weld. Front orientation. Pipe and Fittings. Medium-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Female x Butt

    Weld

    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    304 Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    304
    Stainless Steel
    316
    Stainless Steel
    (A)
    (B)
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    NPT Female × Butt Weld
    1/8
    		1/8
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K221000004452K51100000
    1/4
    		1/4
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K22200004452K5120000
    3/8
    		3/8
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K22300004452K3130000
    1/2
    		1/2
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K22400004452K3140000
    3/4
    		3/4
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K22500004452K31500000
    1
    		1
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K226000004452K31600000
    1 1/4
    		1 1/4
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K78000004452K51700000
    1 1/2
    		1 1/2
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K79000004452K51800000
    2
    		2
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K81000004452K51900000
    2 1/2
    		2 1/2
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K161000004452K631000000
    3
    		3
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K2270000004452K632000000
    4
    		4
    		1000
    		1,000 psi @ 72° F650 psi @ 350° F4464K2280000004452K633000000
     

    High-Pressure Stainless Steel Threaded Pipe Fittings

    Use these heavy duty fittings in high-pressure flow applications.
    Straight Adapters
    Image of Product. Female x Butt Weld. Front orientation. Pipe and Fittings. High-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Female x Butt

    Weld

    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    304 Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    Dash
    Size
    304 Stainless Steel
    316 Stainless Steel
    (A)
    (B)
    (A)
    (B)
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/8
    		1/8
    		02023000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K571000003,000 psi @ 72° F2,800 psi @ 350° F4443K671000000
    1/4
    		1/4
    		04043000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K572000003,000 psi @ 72° F2,800 psi @ 350° F4443K67200000
    3/8
    		3/8
    		06063000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K573000003,000 psi @ 72° F2,800 psi @ 350° F4443K67300000
    1/2
    		1/2
    		08083000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K574000003,000 psi @ 72° F2,800 psi @ 350° F4443K67400000
    3/4
    		3/4
    		12123000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K575000003,000 psi @ 72° F2,800 psi @ 350° F4443K67500000
    1
    		1
    		16163000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K576000003,000 psi @ 72° F2,800 psi @ 350° F4443K67600000
    1 1/4
    		1 1/4
    		20203000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K577000003,000 psi @ 72° F2,800 psi @ 350° F4443K67700000
    1 1/2
    		1 1/2
    		24243000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K578000003,000 psi @ 72° F2,800 psi @ 350° F4443K678000000
    2
    		2
    		32323000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K579000003,000 psi @ 72° F2,800 psi @ 350° F4443K679000000
    2 1/2
    		2 1/2
    		40403000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K1710000003,000 psi @ 72° F2,800 psi @ 350° F4443K171000000
    3
    		3
    		48483000
    		2,500 psi @ 72° F1,900 psi @ 350° F45525K1720000003,000 psi @ 72° F2,800 psi @ 350° F4443K172000000
     

    Premium Low-Pressure Stainless Steel Threaded Pipe Fittings

    Unlike other stainless steel fittings, these are cast in the U.S. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition. All fittings except plugs adhere to ANSI/MSS SP-114 standards for heat treating, material thickness, and marking. It’s the highest quality standard for Pressure Class 150 low-pressure stainless steel fittings. They also meet either ASTM A351 or A479 requirements for parts that will be used in pressure systems. These stainless steel fittings are more corrosion resistant than steel fittings, and almost as strong.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Straight Adapters
    Image of Product. Female x Butt Weld. Front orientation. Pipe and Fittings. Premium Low-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Female x Butt

    Weld

    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    304 Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    304
    Stainless Steel
    316
    Stainless Steel
    (A)
    (B)
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    NPT Female × Butt Weld
    1 1/2
    		1 1/2
    		150
    		300 psi @ 72° F150 psi @ 350° F90691A16400000090697A164000000
    2
    		2
    		150
    		300 psi @ 72° F150 psi @ 350° F90691A1650000090697A16500000
    3
    		3
    		150
    		300 psi @ 72° F150 psi @ 350° F90691A16600000090697A166000000
    4
    		4
    		150
    		300 psi @ 72° F150 psi @ 350° F90691A16700000090697A167000000
     

    High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

    A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Pressure Class 3000 fittings, they have excellent strength to handle high-pressure applications.
    Straight Adapters
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Female × Butt

    Weld

    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Pipe
    Size
    Dash
    Size
    (A)
    (B)
    (A)
    (B)
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/8
    		1/8
    		02023000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K15100000
    1/4
    		1/4
    		04043000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K1520000
    3/8
    		3/8
    		06063000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K1530000
    1/2
    		1/2
    		08083000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K1540000
    3/4
    		3/4
    		12123000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K1550000
    1
    		1
    		16163000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K1560000
    1 1/4
    		1 1/4
    		20203000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K1570000
    1 1/2
    		1 1/2
    		24243000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K15800000
    2
    		2
    		32323000
    		Galvanized Steel3,000 psi @ 72° F300 psi @ 360° F7739K15900000
     

    Extreme-Pressure Iron and Steel Threaded Pipe Fittings

    The strongest steel fittings we offer, these can withstand extreme-pressure applications.
    Note: The maximum pressure listed for Class 6000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
    Straight Adapters
    Image of Product. Front orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters, Threaded Fitting Connection, Butt-Weld Fitting Connection, Female.

    Female,

    Butt-Weld

    Fitting

    Connection,

    Threaded Fitting

    Connection

    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Pipe
    Size
    Dash
    Size
    (A)
    (B)
    (A)
    (B)
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female × Butt Weld
    1/4
    		1/4
    		04046000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K4100000
    3/8
    		3/8
    		06066000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K420000
    1/2
    		1/2
    		08086000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K730000
    3/4
    		3/4
    		12126000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K740000
    1
    		1
    		16166000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K750000
    1 1/4
    		1 1/4
    		20206000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K11500000
    1 1/2
    		1 1/2
    		24246000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K7700000
    2
    		2
    		32326000
    		Steel6,000 psi @ 72° F300 psi @ 360° F43455K7800000
     

    High-Pressure Stainless Steel Socket-Connect Pipe Fittings

    Forged for excellent strength, these heavy duty socket-connect fittings stand up to high-pressure applications. They 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.
    Straight Adapters
    Image of Product. Female × Butt Weld. Front orientation. Pipe and Fittings. High-Pressure Stainless Steel Socket-Connect Pipe Fittings, Straight Adapters, Socket Connect Female × Butt Weld.

    Female × Butt

    Weld

    Socket Connect Female × Butt Weld—Socket connect x butt weld straight adapters are also known as half couplings.
    304/304L Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.
    316/316L Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Pipe
    Size
    Dash
    Size
    304/304L Stainless Steel
    316/316L Stainless Steel
    (A)
    (B)
    (A)
    (B)
    OD
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Socket Connect Female × Butt Weld
    1/8
    		1/8
    		02023/4"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K3110000003,000 psi @ 72° F1,900 psi @ 350° F45515K411000000
    1/4
    		1/4
    		04047/8"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K312000003,000 psi @ 72° F1,900 psi @ 350° F45515K41200000
    3/8
    		3/8
    		06061 1/16"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K313000003,000 psi @ 72° F1,900 psi @ 350° F45515K41300000
    1/2
    		1/2
    		08081 1/4"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K314000003,000 psi @ 72° F1,900 psi @ 350° F45515K41400000
    3/4
    		3/4
    		12121 1/2"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K315000003,000 psi @ 72° F1,900 psi @ 350° F45515K41500000
    1
    		1
    		16161 13/16"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K316000003,000 psi @ 72° F1,900 psi @ 350° F45515K41600000
    1 1/2
    		1 1/2
    		24242 1/2"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K31800000—————0
    2
    		2
    		32323"3000
    		2,500 psi @ 72° F1,900 psi @ 350° F44965K3190000003,000 psi @ 72° F1,900 psi @ 350° F45515K419000000
     

    Spin-Weld Plastic Pipe Fittings for Water

    Image of ProductInUse. Front orientation. Pipe and Fittings. Spin-Weld Plastic Pipe Fittings for Water.
    Create a leak-free, durable connection in plastic tanks, walls, or panels without gaskets or sealants. As you spin these fittings with a handheld electric router, they melt into the surface of your tank for a seal without any joints. To hold these fittings in your router, you’ll need the installation tool (sold separately). For proper installation, you’ll want to use a hole saw to drill a hole that matches the For Hole Diameter listed and check that your router meets the speed and power requirements shown in the table.
    To prevent leaks in threaded connections, apply a sealant to the male threads. Threaded connections can be taken apart as needed for maintenance and repair. For metal threads, use PTFE tape. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
    Through-Wall Straight Adapters for Tanks
    Image of Product. Front orientation. Pipe and Fittings. Spin-Weld Plastic Pipe Fittings for Water, Through-Wall Straight Adapters for Tanks.
    Through-wall fittings are also known as bulkhead couplings; they mount through your wall or tank to create an inlet or outlet. When installing, the gasket should be on the inside of the wall.
    Fittings for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum.
    Threaded Fitting Connection—Threaded female x butt weld straight adapters are also known as half couplings.
    Pipe
    Size
    Hose
    Size
    For Hole
    Diameter (B)
    For Tank
    Surface (B)
    Material
    Color
    Each
    NPT Female × Butt Weld
    1/4
    		—0.88"FlatLDPEWhite4526N1100000
    1/2
    		—0.88"FlatLDPEWhite4526N210000
    3/4
    		—1.31"FlatLDPEWhite4526N310000
    1
    		—1.5"FlatLDPEWhite4526N410000
    1 1/2
    		—2"FlatLDPEWhite4526N510000
    2
    		—2.5"FlatLDPEWhite4526N610000
     
    GHT Male × Butt Weld
    —3/41"FlatLDPEWhite4526N710000
     
    Installation Tools
    Image of Product. Front orientation. Spin-Weld Installation Tools.
    For Pipe
    Size
    For Hose
    Size
    Shank
    Dia.
    Overall
    Lg.
    Material
    Shank
    Type
    For Tool
    Type
    Each
    For Pipe Connection
    1/4
    		—1/4"1 5/8"Aluminum
    		RoundHand Router4526N10000000
    1/2
    		—1/4"1 5/8"Aluminum
    		RoundHand Router4526N2000000
    3/4
    		—1/2"2"Aluminum
    		RoundHand Router4526N3000000
    1
    		—1/2"2 1/4"Aluminum
    		RoundHand Router4526N4000000
    1 1/2
    		—1/2"2 1/4"Aluminum
    		RoundHand Router4526N5000000
    2
    		—1/2"2 1/4"Aluminum
    		RoundHand Router4526N6000000
     
    For Hose Connection
    —3/41/4"1 3/4"Aluminum
    		RoundHand Router4526N7000000
     

    High-Pressure Iron and Steel 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 have heavy duty construction that stands up to high-pressure applications. They are for use in noncorrosive environments.
    Straight Adapters
    Image of Product. Front orientation. Pipe and Fittings. High-Pressure Iron and Steel Socket-Connect Pipe Fittings, Straight Adapters, Socket Connect Female × Butt Weld.

    Socket Connect

    Female × Butt

    Weld

    Socket Connect Female × Butt Weld—Socket connect x butt weld straight adapters are also known as half couplings.
    Pipe
    Size
    (A)
    (B)
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    Socket Connect Female × Butt Weld
    1/8
    		1/8
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K21100000
    1/4
    		1/4
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K2120000
    3/8
    		3/8
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K2130000
    1/2
    		1/2
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K2140000
    3/4
    		3/4
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K2150000
    1
    		1
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K2160000
    1 1/4
    		1 1/4
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K21700000
    1 1/2
    		1 1/2
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K21800000
    2
    		2
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K21900000
    2 1/2
    		2 1/2
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K221000000
    3
    		3
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K222000000
    4
    		4
    		3000
    		Steel3,000 psi @ 72° FNot Rated45005K223000000
     
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