NPT American National Pipe Taper Threading Inserts – 16ER / 16IR Series
Ideal for: High-Pressure Piping, Oil & Gas, Plumbing, Hydraulic Seals.
- Product Standard: NPT (National Pipe Taper) American Standard Full Profile laydown threading inserts.
- Leak-Proof Geometry: Engineered with a 60° profile and 1:16 taper (1°47′) to create reliable, pressure-tight mechanical seals.
- Complete Thread Form: Full Profile carbide threading inserts top the crest for a burr-free, perfectly concentric finish.
- Core Availability: The versatile 16er threading insert (3/8″ I.C.) range covers all standard pitches from 27 TPI to 8 TPI.
- Versatility: Premium threading inserts for lathe applications, stocked in Right-Hand (ER/IR) and left hand thread insert (EL/IL) configurations.
Contact our sales team to discover all of your pricing options.
Product Overview
Manufacture industry-standard pipe threads with our NPT Full Profile laydown threading inserts. Designed for the American market, these inserts produce the specific 60° tapered thread form required for NPT (National Pipe Taper) connections used in fluid and gas transport6.
Featuring a “Full Profile” design, these carbide threading inserts cut the thread groove, the 1:16 taper, and top the crest in a single operation. This ensures strict adherence to ANSI/ASME standards, guaranteeing that pipes and fittings seal correctly under pressure.
Key Features & Benefits
- Standard Compliance: Precision ground to maintain the critical 1°47′ taper angle essential for creating a wedging action that seals the joint.
- The 16ER Standard: Our 16er threading inserts are the universal solution for pipe threading, covering the most common range (1/8″ to 2″ pipe sizes) in a single insert size.
- Optimized Performance: Tough carbide grades resist the heat generated during the continuous cutting of tapered threads in steel and stainless steel.
- Directional Options: To support diverse manufacturing setups, we offer standard right-hand models and specific left hand thread insert models (e.g., 16EL 11.5 NPT).
External NPT Insert Model
| I.C. | Pitch (TPI) | Right-hand | Left-hand | L | X | Y |
|---|---|---|---|---|---|---|
| 3/8″ | 27 | 16ER27NPT | 16EL27NPT | 16 | 0.8 | 0.7 |
| 3/8″ | 18 | 16ER18NPT | 16EL18NPT | 16 | 0.8 | 0.7 |
| 3/8″ | 14 | 16ER14NPT | 16EL14NPT | 16 | 1.5 | 1.1 |
| 3/8″ | 11.5 | 16ER11.5NPT | 16EL11.5NPT | 16 | 1.5 | 1.1 |
| 3/8″ | 8 | 16ER8NPT | 16EL8NPT | 16 | 1.5 | 1.1 |
Internal NPT Insert Model
| I.C. | Pitch (TPI) | Right-hand | Left-hand | L | X | Y |
|---|---|---|---|---|---|---|
| 3/8″ | 27 | 16IR27NPT | 16IL27NPT | 16 | 0.8 | 0.7 |
| 3/8″ | 18 | 16IR18NPT | 16IL18NPT | 16 | 0.8 | 0.7 |
| 3/8″ | 14 | 16IR14NPT | 16IL14NPT | 16 | 1.5 | 1.1 |
| 3/8″ | 11.5 | 16IR11.5NPT | 16IL11.5NPT | 16 | 1.5 | 1.1 |
| 3/8″ | 8 | 16IR8NPT | 16IL8NPT | 16 | 1.5 | 1.1 |
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Contact our sales team to discover all of your pricing options
