Steel NPT Pipe Thread Fittings

The HFI manufacturing system of hydraulic fittings has in place techniques to maintain consistent, even thread pitches on every fitting. All steel starts from certified bar stock and is cut to perfection. Silver brazing and other brazing techniques are used to form ideal shapes. HFI fabricates elbows, tees, crosses and 45 degree elbows in addition to specials. Our brazed elbows withstand great amounts of high pressure and will njot leak.

Styles AvailableHFI manufactures Air-Way style fittings that comprise of JIC, NPT, ORFS, DIN, Metric, Inverted Flare ond others as well.

National Pipe Thread is a U. S. standard for tapered (NPT) or straight (NPS) threads used to join pipes and fittings. ANSI/ASME standard B1. 20. 1 covers threads of 60-degree form with flat crests and roots in sizes from ¹/16 inch to 24 inch Nominal Pipe Size. The taper rate for all NPT threads is ¹/16 (³/4 inch per foot) measured by the change of diameter (of the pipe thread) over distance. The taper divided by a center line yields an angle 1° 47 24" or 1. 7899° as measured from the center axis. Commonly-used sizes are ¹/8, ¹/4, ³/8, ¹/2, ³/4, 1, 1 ¹/4, 1 ¹/2, and 2 inch, appearing on pipe and fittings by most U. S. suppliers. Smaller sizes than those listed are occasionally used for compressed air. Larger sizes are used less frequently because other methods of joining are more practical at 3 inches and above in most applications. Nominal Pipe Size is loosely related to the inside diameter of schedule 40 pipe. Because of the pipe wall thickness, the actual diameter of the threads is larger than the NPS, considerably so for small NPS. Other schedules of pipe have different wall thickness but the OD (outer diameter) and thread profile remain the same, so the inside diameter of the pipe is therefore different from the nominal diameter. Threaded pipes can provide an effective seal for pipes transporting liquids, gases, steam, and hydraulic fluid. These threads are now used in materials other than steel and brass, including PVC, nylon, bronze and cast iron. The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other, as opposed to straight thread fittings or compression fittings in which the threads merely hold the pieces together and do not provide the seal. However a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral. This mea be made leak free with the aid of thread seal tape or a thread sealant compound. (The use of tape or sealant will also help to limit corrosion on the threads, which can make future disassembly nearly impossible. There is also a semi-compatible variant called NPTF or Dryseal, designed to provide a more leak-free seal without the use of teflon tape or other sealant compound. NPTF threads are the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path. Sometimes NPT threads are referred to as MPT (Male Pipe Thread), MNPT, or NPT(M) for male (external) threads and FPT (Female Pipe Thread), FNPT, or NPT(F) for female (internal) threads. An equivalent designation is MIP (Male iron pipe) and FIP (Female iron pipe)

We offer pipe thread fittting and elbows in a variety of shapes. NPT elbow fittings, NPT cross fittings, NPT tee fittings, NPT run tee fittings, NPT branch tee fittings, NPT street tee fittings, NPT street elbows.
Wide selection of steel hydraulic adapters, Hydraulic Hose Couplers and Hydraulic Hose Ends.

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HOME PRODUCTS CORPORATE TECHNICAL CONTACT US Would you like to receive an Internet Welcome Kit loaded with free samples? Click here and we'll send one now! All Products Fittings And Adapters Steel Fittings NPT Fittings PRODUCTS Search For Products NPT PIPE THREAD Tapered pipe thread adapters Click for sizes... 9435 NPT Male Swivel Union 90 Elbow NPT Fittings Interchanges With: Air-Way: 5500SW Aeroquip: 2251 Imperial: Parker Tube: Parker Hose: Weatherhead: 9435 Click for sizes... C3059 NPT Tru-Seal Nut NPT Fittings Interchanges With: Click for sizes... C3069 NPT Male Union Straight NPT Fittings Interchanges With: Air-Way: 5404 Aeroquip: 2083 Imperial: 24SA Parker Tube: FF Parker Hose: 101 Weatherhead: C3069 Click for sizes... C3109 NPT Male to NPT Female Reducer NPT Fittings Interchanges With: Air-Way: 5406 Aeroquip: 2081 Imperial: 24SB Parker Tube: PTR Parker Hose: 102 Weatherhead: C3109 Click for sizes... C3159 NPT Male Hex Head Plug NPT Fittings Interchanges With: Air-Way: 5406P Aeroquip: 2082 Imperial: Parker Tube: HP Parker Hose: 01CP Weatherhead: C3159 Click for sizes... C3169 NPT Male Socket Head Plug NPT Fittings Interchanges With: Air-Way: 5406H Aeroquip: 2222 Imperial: 24SR Parker Tube: HHP Parker Hose: 01HP Weatherhead: C3169 Click for sizes... C3179 NPT Male Square Head Plug NPT Fittings Interchanges With: Air-Way: 5406S Aeroquip: Imperial: 25SP Parker Tube: Parker Hose: Weatherhead: C3179 Click for sizes... C3209 NPT Male to NPT Female Expander NPT Fittings Interchanges With: Air-Way: 5405 Aeroquip: 2040 Imperial: Parker Tube: FG Parker Hose: 201 Weatherhead: C3209 Click for sizes... C3239 NPT Male to SAE Female Boss Straight NPT Fittings Interchanges With: Air-Way: 6404 Aeroquip: 2246 Imperial: Parker Tube: FHG5 Parker Hose: Weatherhead: C3239 Click for sizes... C3249 NPT Male to SAE Male Boss Straight NPT Fittings Interchanges With: Air-Way: 6401 Aeroquip: Imperial: Parker Tube: Parker Hose: Weatherhead: C3249 Click for sizes... C3269 NPT Female to SAE Male Boss Straight NPT Fittings Interchanges With: Air-Way: 6405 Aeroquip: 2216 Imperial: 720-FSO Parker Tube: F50G Parker Hose: 502 Weatherhead: C3269 Click for sizes... C3309 NPT Female Union Straight NPT Fittings Interchanges With: Air-Way: 5000 Aeroquip: 2096 Imperial: 24SJ Parker Tube: GG Parker Hose: 202 Weatherhead: C3309 Click for sizes... C3359 NPT Male Union 45 Elbow NPT Fittings Interchanges With: Air-Way: 5503 Aeroquip: 2088 Imperial: 25TG Parker Tube: CD45 Parker Hose: 3102 Weatherhead: C3359 Click for sizes... C3469 NPT Female to SAE Male Boss 90 Elbow NPT Fittings Interchanges With: Air-Way: 6805LL Aeroquip: 206804 Imperial: Parker Tube: AE4OG Parker Hose: 5502 Weatherhead: C3469 Click for sizes... C3509 NPT Female Union 90 Elbow NPT Fittings Interchanges With: Air-Way: 5504 Aeroquip: 2087 Imperial: 25UJ Parker Tube: DD Parker Hose: 2202 Weatherhead: C3509 Click for sizes... C3529 NPT Male Union 90 Elbow NPT Fittings Interchanges With: Air-Way: 5500 Aeroquip: 2085 Imperial: 25UA Parker Tube: CR Parker Hose: 2101 Weatherhead: C3529 Click for sizes... C3569 NPT Male to SAE Male Boss 90 Elbow NPT Fittings Interchanges With: Click for sizes... C3609 NPT Female - NPT Male Branch Tee NPT Fittings Interchanges With: Air-Way: 5604 Aeroquip: 2091 Imperial: 25VC Parker Tube: MMS Parker Hose: 212T Weatherhead: C3609 Click for sizes... C3709 NPT Female Union Tee NPT Fittings Interchanges With: Air-Way: 5605 Aeroquip: 2090 Imperial: 25VJ Parker Tube: MMO Parker Hose: 022T Weatherhead: C3709 Click for sizes... C3759 NPT Female - NPT Male Run Tee NPT Fittings Interchanges With: Air-Way: 5602 Aeroquip: 2092 Imperial: 25VK Parker Tube: MRO Parker Hose: 012T Weatherhead: C3759 Click for sizes... C3805 NPT Male - NPT Female Run Tee NPT Fittings Interchanges With: Air-Way: 5603 Aeroquip: 2093 Imperial: Parker Tube: Parker Hose: Weatherhead: C3805 Click for sizes... C3959 NPT Male Union Cross NPT Fittings Interchanges With: Air-Way: 5652 Aeroquip: 2080 Imperial: 25WJ Parker Tube: KMMOO Parker Hose: 022X Weatherhead: C3959 HFI FLUID POWER PRODUCTS 1210 Washington Ave. Racine, WI. 53403 Phone: (800) 822-6122         Fax: (262) 634-2127 http://www.hfifluidpowerproducts.com sales@hfifluidpowerproducts.com List Of All Products        Web Design 2007 Christopher Biemeck

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