ANSI Thread ring gauge NPT
10-07-024
Product Details
Title
NPT Thread Ring Gauge 1/8–1-1/4 | Taper Pipe 6g External Thread Gauge Manufacturer Supplier
Description
NPT Thread Ring Gauge is a precision measuring tool designed for external tapered pipe thread verification and sealing performance control. It offers a measuring range of 1/8" to 1-1/4", tolerance grade 6g, and hardened precision-ground threads, making it suitable for oil & gas, hydraulic systems, and industrial piping. Manufactured from hardened tool steel, this gauge provides reliable performance for inspection, machining, and quality control applications.
SKU Table
| Model / Art No | Thread Size | Accuracy | Resolution |
|---|---|---|---|
| Multiple SKUs (see below) | 1/8" – 1-1/4" NPT | 6g / NPT standard | N/A (limit gauge) |
Available Models (Full List)
| Thread Size | SKU |
|---|---|
| 1/8"×27 | M5109-NPT1827 |
| 1/4"×18 | M5109-NPT1418 |
| 3/8"×18 | M5109-NPT3818 |
| 1/2"×14 | M5109-NPT1214 |
| 3/4"×14 | M5109-NPT3414 |
| 1"×11.5 | M5109-NPT1115 |
| 1 1/4"×11.5 | M952635 |
Technical Specifications
- Product Name: NPT Thread Ring Gauge
- Category: Pipe Thread Ring Gauge
- Range: 1/8" – 1-1/4"
- Accuracy: 6g tolerance grade
- Resolution: N/A (limit gauge)
- Material: Hardened tool steel
- Display: None
- Output: None
- Structure Feature:
- Tapered internal thread profile (NPT 60°)
- Hardened and precision ground surface
- Knurled outer ring with black oxide finish
- Laser marking: size, tolerance, serial number
- Standard: ANSI/ASME B1.20.1 (NPT)
- Brand: Custom / OEM available
- Model / Art No: Multiple SKUs
Applications
This product is suitable for:
- External NPT thread inspection
- Pipe sealing performance verification
- Valve and fitting inspection
- Production line quality control
It is widely used in:
- Oil & gas industry
- Hydraulic and pneumatic systems
- Industrial piping
- Energy and process industries
Selection Advice
- Recommended for users requiring external tapered pipe thread inspection (NPT standard)
- For internal threads, use NPT thread plug gauges
- For parallel threads, consider BSPP (G thread) gauges
- For British taper threads, consider BSPT (R thread) gauges
Key Features
- Designed for NPT taper pipe thread standard (ANSI/ASME B1.20.1)
- 6g tolerance grade for external thread verification
- Knurled black oxide finish for durability and grip
- Laser marking with traceable serial number
- Supplied with full inspection report after 100% verification
FAQ
1. What is the difference between models?
Models differ by thread size and pitch (TPI). All follow NPT taper thread standards but are designed for different pipe diameters.
2. Accuracy vs Resolution — what applies here?
- Accuracy: Defined by NPT standard and 6g tolerance
- Resolution: Not applicable, as this is a limit gauge
3. Manual vs Digital — where does this product fit?
This is a manual inspection gauge, used for pass/fail verification of threaded connections.
4. Which industries typically use this product?
- Oil & gas
- Energy sector
- Hydraulic systems
- Industrial manufacturing
5. Is customization available?
Yes, customization options include:
- Special NPT sizes or tolerances
- OEM branding and laser marking
- Custom inspection reports
- Packaging customization