NPT Pipe Fittings
American National Standard Taper Pipe Thread (NPT) fittings in 316L and 304 stainless steel. Features 60-degree taper angle threads providing robust metal-to-metal sealing for instrumentation, chemical delivery, and hygienic sampling points.
NPT 45° Threaded Elbow — Class 150, 3000 & 6000
A 45° female-threaded NPT elbow for changing the direction of a threaded stainless steel pipe run. Offered across Class 150, Class 3000, and Class 6000 series in 304/304L and 316/316L stainless steel from 1/8" to 6".
NPT 90° Threaded Elbow — Class 150, 3000 & 6000
A 90° female-threaded NPT elbow for right-angle turns in threaded stainless steel piping. Offered across Class 150, Class 3000, and Class 6000 series in 304/304L and 316/316L stainless steel from 1/8" to 6".
NPT 90° Reducing Elbow — Class 150, 316 Stainless Steel
A 90° female-to-female NPT reducing elbow that combines a right-angle turn with a pipe size transition in a single fitting. Supplied in Class 150 316 stainless steel across 15 reducing combinations from 1/2" × 1/4" to 2" × 1-1/2".
NPT 45° Street Elbow (Male × Female) — Class 150, 316 Stainless Steel
A 45° male-to-female NPT street elbow for threading directly into a female port to make a 45° directional offset without a separate close nipple. Supplied in Class 150 316 stainless steel from 1/4" to 2".
NPT 90° Street Elbow (Male × Female) — Class 150 & 3000
A 90° male-to-female NPT street elbow for compact right-angle take-offs directly from female-threaded ports. Offered across Class 150 and Class 3000 series in 304/304L and 316/316L stainless steel from 1/8" to 4".
NPT Threaded Equal Cross — Class 150 & 3000
Four-way 90° female-threaded NPT equal cross for orthogonal four-branch distribution and manifold junctions. Offered across Class 150 and Class 3000 series in 304/304L and 316/316L stainless steel from 1/8" to 3".
NPT Lateral Wye Tee (45° Y-Branch) — Class 150 & 3000
Three-port female-threaded NPT 45° lateral wye combining a straight main run with a 45° low-turbulence branch entry. Offered in Class 150 316 stainless steel and Class 3000 forged 304/304L stainless steel from 1/2" to 2".
NPT Threaded Reducing Tee — Class 150, 3000 & 6000
Three-port female-threaded NPT branch-reducing tee for taking a smaller 90° branch line off a straight main run. Offered across Class 150, Class 3000, and Class 6000 series in 304/304L and 316/316L stainless steel (1/2" × 1/4" to 2" × 1-1/2").
NPT Threaded Equal Tee — Class 150, 3000 & 6000
Three-port 90° female-threaded NPT equal tee for splitting or combining flow at right angles in threaded stainless steel piping. Offered across Class 150, Class 3000, and Class 6000 series in 304/304L and 316/316L stainless steel (1/8"–6").
NPT Threaded Pipe Cap — Class 150, 3000 & 6000
Female-threaded NPT pipe cap for closing and sealing male-threaded stainless steel pipe ends. Offered across Class 150, Class 3000, and Class 6000 series in 304/304L and 316/316L stainless steel covering nominal pipe sizes from 1/8" to 6".
NPT Hex-Head Pipe Plug — Class 150, 316 Stainless Steel
External hex-head male NPT pipe plug for sealing female-threaded ports, manifold bosses, and gauge tappings with standard wrench access. Supplied in Class 150 316 stainless steel across nominal sizes from 1/8" to 3".
NPT Countersunk Hex-Socket Plug — Class 150, 316 Stainless Steel
Countersunk internal hex-socket male NPT pipe plug for flush port closure where external wrench clearance is restricted. Supplied in Class 150 316 stainless steel across nominal sizes from 1/8" to 2".
NPT Forged Round-Head Plug — Class 3000/6000 (304/304L & 316/316L)
Forged round-head male NPT pipe plug for high-pressure port closure in threaded piping and manifold blocks. Machined from solid forgings per ASME B16.11 (Class 3000/6000) in 304/304L and 316/316L stainless steel from 1/2" to 2".
NPT Forged Square-Head Plug — Class 3000/6000 (304/304L & 316/316L)
Forged external square-head male NPT pipe plug for high-pressure port closure. Machined from solid forgings per ASME B16.11 (Class 3000/6000) in 304/304L and 316/316L stainless steel covering nominal sizes from 1/8" to 3".
NPT Square-Head Plug — Class 150 (304 & 316 Stainless Steel)
Square-head male NPT pipe plug for closing female-threaded ports in low- to medium-pressure stainless steel piping. Offered in Class 150 304 and 316 stainless steel across nominal pipe sizes from 1/8" to 4".
NPT Threaded Pipe Union — Class 150, 3000 & 6000
Three-piece female-to-female NPT pipe union with a threaded center nut for dismantling equipment or pipe sections without rotating the run. Offered across Class 150, Class 3000, and Class 6000 in 304/304L and 316/316L stainless steel (1/8"–4").
NPT Threaded Coupling — Class 150 (304 & 316 Stainless Steel)
Straight female-threaded NPT coupling for joining two inline male-threaded pipes of equal nominal size. Offered in Class 150 304 and 316 stainless steel across nominal pipe sizes from 1/8" to 8".
NPT Forged Full Coupling — Class 3000 & 6000
High-pressure forged female-to-female NPT full coupling for straight inline pipe joints. Machined from solid forgings per ASME B16.11 in Class 3000 and Class 6000 series across 304/304L and 316/316L stainless steel (1/8"–4").
NPT Threaded Half Coupling — Class 150, 3000 & 6000
Single-ended female NPT × weld-end half coupling for welding branch take-offs and instrument ports onto pipe headers or vessels. Offered across Class 150, Class 3000, and Class 6000 in 304/304L and 316/316L stainless steel (1/8"–8").
NPT Equal Hex Nipple — Class 150, 316 Stainless Steel
Double-ended male NPT hexagon pipe nipple with integral center wrench flats for joining two equal female-threaded NPT ports. Supplied in Class 150 316 stainless steel across nominal sizes from 1/4" to 3".
NPT Male Hose Barb Adapter — Class 150, 316 Stainless Steel
Male NPT to serrated hose barb adapter for transitioning from rigid female-threaded NPT ports to flexible industrial hose lines. Supplied in Class 150 316 stainless steel across nominal sizes from 1/8" to 3".
NPT Threaded Reducing Coupling — Class 150, 3000 & 6000
Concentric female-to-female NPT reducing coupling for transitioning inline between two different male NPT pipe sizes. Offered across Class 150, Class 3000, and Class 6000 series in 304/304L and 316/316L stainless steel (1/4" × 1/8" to 6" × 4").
NPT Hex Reducing Bushing (Male × Female) — Class 150 & Class 3000/6000
Coaxial male-to-female NPT hex reducing bushing for stepping down a female NPT port to a smaller female thread size. Offered across Class 150 and Class 3000/6000 series in 304/304L and 316/316L stainless steel (1/4" × 1/8" to 6" × 4").
NPT Reducing Hex Nipple (Male × Male) — Class 150, 316 Stainless Steel
Stepped male-to-male NPT reducing hex nipple with center wrench flats for connecting two unequal female NPT ports. Supplied in Class 150 316 stainless steel across reducing sizes from 1/4" × 1/8" to 1" × 3/4".
NPT Forged Threaded Reducing Insert — Class 3000, 316/316L Stainless Steel
Forged Class 3000 NPT threaded reducing insert with external male NPT threads and reduced internal female NPT threads. Machined from 316/316L stainless steel forgings per ASME B16.11 across 1/2" × 1/4" to 2" × 1-1/2".
NPT Threaded Weld Spud (Tank Outlet Boss) — Class 150 (304 & 316 Stainless Steel)
Female NPT threaded weld spud with a contoured weld base for adding a reinforced female-threaded nozzle to tanks, vessels, or pipe walls. Offered in Class 150 304 and 316 stainless steel covering 3/8" to 4".
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