NPT Male Threads
NPT (National Pipe Taper) Male Threads are a widely used standard for tapered threads designed for sealing pipe connections. These threads create a tighter, leak-proof seal as they are tightened due to their conical shape. They are commonly applied in hydraulic, pneumatic, and industrial piping systems for high-pressure fluid conveyance.
| Thread Size | Major Dia (mm) | Minor Dia (mm) | TPI | Total Length ‘L’ (mm) |
|---|---|---|---|---|
| 1/8″ | 10.62 | 10.00 | 27 | 10.0 |
| 1/4″ | 14.00 | 13.30 | 18 | 14.0 |
| 3/8″ | 17.30 | 16.70 | 18 | 14.0 |
| 1/2″ | 22.00 | 20.83 | 14 | 19.0 |
| 3/4″ | 27.00 | 26.06 | 14 | 19.0 |
| 1″ | 34.00 | 32.66 | 11-1/2 | 24.0 |
| 1-1/4″ | 43.00 | 41.55 | 11-1/2 | 24.8 |
| 1-1/2″ | 49.00 | 47.50 | 11-1/2 | 25.4 |
| 2″ | 60.60 | 59.40 | 11-1/2 | 26.0 |
Specifications
- • Sizes available from 1/8″ to 2″ NPT
- • Major Diameter Range: 10.62 mm to 60.60 mm
- • Thread Pitch: 11½ TPI to 27 TPI
- • Thread Type: Tapered (for leak-tight connections)
- • Complies with ANSI/ASME B1.20.1 Standard
- • Available Materials: Carbon Steel, Stainless Steel, Brass
Features
- • Self-sealing due to taper thread design
- • Suitable for high-pressure and high-vibration applications
- • Precision-machined threads ensure tight tolerance
- • Compatible with PTFE tape or thread sealant
- • Excellent for hydraulic and pneumatic line fittings
Applications
- • Hydraulic Equipment: Secure pipe and hose connections under high pressure
- • Pneumatics: Compressed air systems in automation and packaging
- • Oil & Gas: Leak-proof connections in pipelines and refineries
- • Construction Machinery: Robust fittings for rugged conditions
- • Industrial Manufacturing: Fluid and chemical transport systems
- • Marine Applications: Corrosion-resistant variants for seawater exposure