Reducer / Increaser: Male NPT × Female NPT Thread Reducer Fittings
Sealfast NPT × NPT thread reducer — male NPT one end, smaller female NPT the other. Inline size transition for NPT-threaded pipework.
Key features
- Coupling Family: Thread Reducer Fitting
- Coupling Type / Variant: Thread reducer (Male NPT × Female NPT, different sizes)
- End A Configuration: Male NPT taper thread (larger)
- End B Configuration: Female NPT taper thread (smaller)
- Size Range: Reductions: 1/2"→1/4", 3/4"→1/2", 1"→3/4", 1-1/4"→1", 2"→1-1/2"
- Working Pressure: Up to 1500 psi at room temperature
- Coupling Family
- Thread Reducer Fitting
- Coupling Type / Variant
- Thread reducer (Male NPT × Female NPT, different sizes)
- End A Configuration
- Male NPT taper thread (larger)
- End B Configuration
- Female NPT taper thread (smaller)
- Size Range
- Reductions: 1/2"→1/4", 3/4"→1/2", 1"→3/4", 1-1/4"→1", 2"→1-1/2"
- Working Pressure
- Up to 1500 psi at room temperature
Product description
The Reducer / Increaser: Male NPT × Female NPT Thread Reducer Fittings is a Thread Reducer Fitting from the Sealfast US industrial coupling range. Indus Hydraulics is an authorised Sealfast distributor in the UAE.
Configuration
- Coupling family: Thread Reducer Fitting
- Coupling type: Thread reducer (Male NPT × Female NPT, different sizes)
- End A: Male NPT taper thread (larger)
- End B: Female NPT taper thread (smaller)
Specifications
- Size range: Reductions: 1/2"→1/4", 3/4"→1/2", 1"→3/4", 1-1/4"→1", 2"→1-1/2"
- Materials available: 316 Stainless Steel, Brass, Carbon Steel
- Working pressure: Up to 1500 psi at room temperature
- Seal / gasket: PTFE tape or anaerobic thread sealant required
- Applicable standards: ANSI/ASME B1.20.1 (NPT)
Family context
Stainless-steel and brass thread reducers convert between BSP, NPT, and NPSM thread standards on instrument lines, sample lines, and low-pressure transfer assemblies. Used as inline adapters where the pipe-thread standard differs from the host-equipment standard.
How to order
Specify (a) the size, (b) the body material from the available options, and (c) any special seal / gasket requirements. Indus engineering will confirm the exact Sealfast part number on the RFQ. For Bauer couplings, specify the Bauer-standard size code (2", 3", 4", 5", 6", 8") and end configuration. For Dry Disconnect, specify the seal compound (Viton FKM for petroleum / fuel; PTFE for aggressive chemical) — selection drives the part number.
Companion products
Pair with matching cam-and-groove halves (specialty cam-and-groove), Bauer-standard mating couplings (Bauer Type), or matching dry-disconnect adapter/coupler (Dry Disconnect). Browse the Sealfast Couplings range for the full product family.
Identification
| Parameter | Value |
|---|---|
| Coupling Family | Thread Reducer Fitting |
| Coupling Type / Variant | Thread reducer (Male NPT × Female NPT, different sizes) |
Configuration
| Parameter | Value |
|---|---|
| End A Configuration | Male NPT taper thread (larger) |
| End B Configuration | Female NPT taper thread (smaller) |
Dimensions
| Parameter | Value |
|---|---|
| Size Range | Reductions: 1/2"→1/4", 3/4"→1/2", 1"→3/4", 1-1/4"→1", 2"→1-1/2" |
Construction
| Parameter | Value |
|---|---|
| Materials Available | 316 Stainless Steel, Brass, Carbon Steel |
| Seal / Gasket | PTFE tape or anaerobic thread sealant required |
Performance
| Parameter | Value |
|---|---|
| Working Pressure | Up to 1500 psi at room temperature |
Compliance
| Parameter | Value |
|---|---|
| Applicable Standards | ANSI/ASME B1.20.1 (NPT) |
Shipping & lead time
What is a Thread Reducer Fitting?▾
What are the end configurations?▾
What sizes are available?▾
What materials does this coupling come in?▾
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Is this product compliant with industry standards?▾
Lead time?▾
Shipped worldwide from our Dubai warehouse. Transit, routes and documentation for 126 destinations
The same part, in the designations used across European and Gulf trade catalogues.
- de
- Reduzierung NPT Außengewinde auf NPT Innengewinde
- fr
- réducteur NPT mâle sur NPT femelle
- es
- reductor NPT macho a NPT hembra
- it
- riduzione NPT maschio a NPT femmina
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