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    25 Products

    Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings

    Made to tighter tolerances than other stainless steel pipe fittings, these are also known as instrumentation fittings. The male threads are rolled for extra strength in extreme-pressure applications. Fittings are commonly used to connect equipment in gas and hydraulic fluid lines.
    Caps
    Image of Product. Female. Front orientation. Pipe and Fittings. Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings, Caps, Female, Threaded Fitting Connection, Hex Body.

    Female

    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
    Body
    Shape
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Female
    1/16
    		Hex7,500 psi @ 72° F7,500 psi @ 300° F48805K148000000
     
    Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings, Hex-Drive Plugs, Male, Threaded Fitting Connection.

    Male

    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
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Male
    1/16
    		10,000 psi @ 72° F10,000 psi @ 300° F48805K221000000
     
    External-Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings, External-Hex-Drive Plugs, Male, Threaded Fitting Connection, Hex Body.

    Male

    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
    Construction
    Body
    Shape
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    NPT Male
    1/16
    		HollowHex10,000 psi @ 72° F10,000 psi @ 300° F48805K14900000
     

    Tapered Caps

    Image of Product. Front orientation. Protective Caps. Tapered Caps.
    Don't worry about having the exact size you need on hand. These caps are shaped to fit a range of ODs—just keep pushing on until they're snug. Because they make less contact with the parts they cover, they’re easier to remove than straight caps. In a pinch, you can flip tapered caps over and use them as plugs.
    Polyethylene—Convenient and economical, these flexible caps are one and done. Instead of cleaning and reusing, just toss and grab a new cap.
    For OD
    For Pipe
    Size
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    0.298" to 0.365"1/16
    		3/8"Flexible150Red1004491K14700000
     

    Breather Vents

    Image of Product. Style A. Front orientation. Style A. Breather Vents.

    Style A

    Protect against excess vacuum and pressure in cylinders, gear boxes, enclosures, manifolds, and tanks. You can also use these breather vents to block debris from entering equipment.
    Style
    Pipe
    Size
    Max. Flow Rate
    @ Pressure
    Max. Pressure,
    psi
    Max. Temp.,
    ° F
    Ht.
    For Use With
    Removes Particle
    Size Down To, μm
    Each
    NPT Male
     
    Brass Body and Fitting
    A1/16
    		13 scfm @ 100 psi1503001/2"Air, Inert Gas909833K1900000
     

    Low-Pressure Stainless Steel Threaded Pipe Fittings

    Use these fittings in a low-pressure pipe line.
    Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Low-Pressure Stainless Steel Threaded Pipe Fittings, Hex-Drive Plugs, Threaded Fitting Connection, Male.

    Male

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    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.
    302
    Stainless Steel
    316
    Stainless Steel
    Pipe
    Size
    Pressure
    Class
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    NPTF Male
    1/16
    		150
    		270 psi @ 72° F180 psi @ 360° F4464K559000004452K53900000
     

    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.
    Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Threaded Pipe Fittings, Hex-Drive Plugs, Male, Threaded Fitting Connection.

    Male

    Anodized 2011 Aluminum—Anodized and powder-coated fittings have a decorative matte black finish.
    Pipe
    Size
    Construction
    Pressure
    Class
    Material
    Color
    Max. Pressure
    @ Temp.
    Mil. Spec.
    Each
    NPT Male
    1/16
    		Solid150
    		Anodized 2011 AluminumBlack150 psi @ 72° FFed. Spec. QQ-A-200/83867T36100000
     
    External-Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Low-Pressure Aluminum Threaded Pipe Fittings, External-Hex-Drive Plugs, Male, Threaded Fitting Connection, Hex Body.

    Male

    Pipe
    Size
    Construction
    Pressure
    Class
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Mil. Spec.
    Each
    NPT Male
    1/16
    		Solid150
    		Hex6061 Aluminum150 psi @ 72° FFed. Spec. QQ-A-200/83867T37800000
     

    Expansion Plugs with Bypass

    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style C.

    Style C

    Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing. The seal expands to temporarily close off pipe openings.
    Style C—For Style C, twist the wing nut to expand the seal. They have an NPT threaded bypass for making leak-tight connections.
    Maximum Air Back Pressure—Maximum air back pressure is the amount of pressure a plug can withstand without moving.
    Maximum Water Back Pressure—Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.
    For
    Pipe
    Max. Back
    Pressure
    Material
    Bypass
    Size
    ID
    Air
    Water, ft.
    of head
    Overall
    Ht.
    Temp. Range,
    ° F
    Seal
    Bypass
    Cap
    Pipe
    Size
    Thread
    Type
    Gender
    Each
    Style C
     
    Iron Stem
    1/2
    		0.47" to 0.50"Not Rated464 1/4"30 to 150Natural Rubber
    		Metal1/16
    		NPT
    		Male2644K15000000
     

    Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings

    When space is at a premium choose these compact fittings. Though small in size, they have the strength to handle medium-pressure applications. Fittings are stainless steel for very good corrosion resistance.
    External-Hex-Drive Plugs
    Image of Product. Front orientation. Pipe and Fittings. Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings, External-Hex-Drive Plugs, Male, Threaded Fitting Connection, Hex Body.

    Threaded Fitting

    Connection, Male,

    Hex Body

    303 Stainless Steel—Fittings have very good corrosion resistance.
    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.
    303
    Stainless Steel
    316
    Stainless Steel
    Pipe
    Size
    Construction
    Body
    Shape
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    Each
    NPT Male
    1/16
    		HollowHex500 psi @ 72° F100 psi @ 350° F2684K331000008767N113000000
     
    BSPT Male
    1/16
    		SolidHex500 psi @ 72° F100 psi @ 350° F2684K33900008767N11400000
     
    External-Hex-Drive Plugs with Gasket
    Image of Product. Front orientation. Pipe and Fittings. Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings, External-Hex-Drive Plugs with Gasket, Threaded Fitting Connection, Male, Hex Body.

    Male, Threaded

    Fitting

    Connection, Hex

    Body

    303 Stainless Steel—Fittings have very good corrosion resistance.
    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.
    Fluoroelastomer—These gaskets resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol.
    303
    Stainless Steel
    316
    Stainless Steel
    Pipe
    Size
    Construction
    Body
    Shape
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Gasket
    Material
    Each
    Each
    BSPP Male
    1/16
    		SolidHex500 psi @ 72° F100 psi @ 350° FFluoroelastomer
    		2684K3010000008767N109000000
     

    Plastic Pipe Fittings for Oil

    Made of corrosion-resistant plastic, these fittings won’t deteriorate when used in oil applications. They also have high strength and impact resistance.
    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.
    Warning: Never use plastic pipe fittings, flanges, and pipe with compressed air or gas.
    External-Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Plastic Pipe Fittings for Oil, External-Hex-Drive Plugs, Male, Threaded Fitting Connection.

    Male

    Pipe
    Size
    Material
    Color
    Max. Pressure
    @ Temp.
    Each
    NPT Male
    1/16
    		PVDFWhiteNot Rated8316T4600000
     

    High-Pressure Brass and Bronze Threaded Pipe Fittings

    High pressures are no problem for these heavy-duty fittings. They are brass for good corrosion resistance.
    Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. High-Pressure Brass and Bronze Threaded Pipe Fittings, Hex-Drive Plugs, Male, Threaded Fitting Connection.

    Male

    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Male
    1/16
    		Brass1,000 psi @ 72° F50785K26700000
     

    High-Pressure Stainless Steel Threaded Pipe Fittings

    Use these heavy duty fittings in high-pressure flow applications.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Hex-Drive Plugs
    347 Stainless Steel—Fittings have excellent corrosion resistance and can withstand prolonged heat exposure.
    347 Stainless Steel
    Pipe
    Size
    Certification
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Each
    ANPT Male
    1/16
    		Mil. Spec.
    		3,000 psi @ 72° F600 psi @ 220° F1725K1100000
     

    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.
    Hex-Drive Plugs
    Image of Product. Front orientation. Pipe and Fittings. Extreme-Pressure Iron and Steel Threaded Pipe Fittings, Hex-Drive Plugs, Male, Threaded Fitting Connection.

    Threaded

    Fitting

    Connection,

    Male

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    PTF-SAE Thread—PTF-SAE (Dryseal) threads are compatible with NPT threads.
    PTFE-Coated Steel—PTFE-coated steel fittings have better corrosion resistance than galvanized and zinc-plated steel fittings.
    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Pipe
    Size
    Material
    Color
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    NPTF Male
    1/16
    		Zinc-Plated Steel—6,000 psi @ 72° F—50925K62900000
     
    PTF-SAE Male
    1/16
    		PTFE-Coated SteelBlue5,000 psi @ 72° FNot Rated4534K210000
    1/16
    		Steel
    		—5,000 psi @ 72° FNot Rated4534K510000
     

    Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

    Made to tighter tolerances than other steel pipe fittings, these are also known as instrumentation fittings. They are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.
    External-Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings, External-Hex-Drive Plugs, Male, Threaded Fitting Connection, Hex Body.

    Male

    Pipe
    Size
    Construction
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Male
    1/16
    		SolidHexGalvanized Steel10,000 psi @ 72° F5232T446000000
     

    High-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

    Not only do these fittings have the strength to handle high-pressure applications, the male threads have a sealant applied for extra protection against leaks. Fittings are brass for good corrosion resistance.
    Hex-Drive Plugs
    Image of Product. Male. Front orientation. Pipe and Fittings. High-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant, Hex-Drive Plugs, Male, Threaded Fitting Connection.

    Male

    Pipe
    Size
    Material
    Max. Pressure
    @ Temp.
    Each
    NPT Male
    1/16
    		Brass1,000 psi @ 72° F50785K16700000
     

    Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings with Sealant

    The male threads on these fittings have a sealant applied for extra leak protection. Fittings are made of galvanized iron or steel, which have fair corrosion resistance. Also known as Pressure Class 125 or 150 fittings, they are for use in low-pressure applications.
    Hex-Drive Plugs
    Image of Product. NPTF Male. Front orientation. Pipe and Fittings. Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings with Sealant, Hex-Drive Plugs, Male, Threaded Fitting Connection.

    NPTF Male

    NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.
    Pipe
    Size
    Pressure
    Class
    Material
    Max. Pressure
    @ Temp.
    Max. Steam
    Pressure @ Temp.
    Each
    NPTF Male
    1/16
    		150
    		Galvanized SteelNot RatedNot Rated1162T6400000
     
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