ANSI Fine thread plug gauge UNF 2B
10-07-017
Product Details
Title
UNF Thread Plug Gauge No.0–1-1/2" 2B | ANSI B1.1 Go No-Go Fine Thread Gauge Manufacturer Supplier
Description
UNF Thread Plug Gauge 2B is a precision inspection tool designed for internal unified fine thread verification and quality control. It offers a measuring range from No.0 to 1-1/2 inches, tolerance class 2B according to ANSI B1.1-1982, and a Go/No-Go double-ended design, making it suitable for precision machining, aerospace, and automotive industries. Manufactured from hardened tool steel, this gauge ensures reliable performance in thread inspection, production control, and quality assurance applications.
SKU Table
| Model / Art No | Thread Size | Accuracy | Resolution |
|---|---|---|---|
| Multiple SKUs (see below) | No.0 – 1-1/2" UNF | Class 2B (ANSI B1.1) | N/A (fixed gauge) |
Available Models (Partial List)
Number Sizes
| Thread Size | SKU |
|---|---|
| No.0×80 | 17-3330-101 |
| No.1×72 | 17-3330-741 |
| No.2×64 | 17-3330-751 |
| No.3×56 | 17-3330-161 |
| No.4×48 | 17-3330-181 |
| No.5×44 | 17-3330-201 |
| No.6×40 | 17-3330-221 |
| No.8×36 | 17-3330-241 |
| No.10×32 | 17-3330-261 |
| No.12×28 | 17-3330-291 |
Inch Sizes
| Thread Size | SKU |
|---|---|
| 1/4"-28 | 17-3330-321 |
| 5/16"-24 | 17-3330-341 |
| 3/8"-24 | 17-3330-361 |
| 7/16"-20 | 17-3330-071 |
| 1/2"-20 | 17-3333-423 |
| 9/16"-18 | 17-3330-451 |
| 5/8"-18 | 17-3330-481 |
| 3/4"-16 | 17-3330-511 |
| 7/8"-14 | 17-3330-541 |
| 1"-12 | 17-3330-581 |
| 1 1/8"-12 | 17-3330-611 |
| 1 1/4"-12 | 17-3330-641 |
| 1 3/8"-12 | 17-3330-681 |
| 1 1/2"-12 | 17-3330-711 |
Technical Specifications
- Product Name: UNF Thread Plug Gauge 2B (Go/No-Go)
- Category: Thread Plug Gauge
- Range: No.0 – 1-1/2" (UNF series)
- Accuracy: Class 2B
- Resolution: N/A (limit gauge)
- Material: Hardened tool steel
- Display: None
- Output: None
- Structure Feature:
- Go/No-Go double-ended design
- Precision fine thread profile
- Steel handle with engraved markings
- Front marking: size and tolerance
- Back marking: serial number
- Standard: ANSI B1.1-1982
- Brand: Custom / OEM available
- Model / Art No: Multiple SKUs
Applications
This product is suitable for:
- Internal fine thread inspection
- High-precision component verification
- Production quality control
- Thread tolerance validation
It is widely used in:
- Aerospace industry
- Automotive manufacturing
- Precision engineering
- Instrumentation and equipment manufacturing
Selection Advice
- Recommended for users requiring high-precision UNF thread inspection
- For coarse threads, consider UNC thread plug gauges
- For external threads, consider thread ring gauges
- For detailed measurement and analysis, consider thread micrometers or optical systems
Key Features
- Manufactured according to ANSI B1.1-1982 UNF fine thread standard
- Class 2B tolerance for general-purpose precision applications
- Go/No-Go design ensures fast and reliable inspection
- Engraved steel handle with serial traceability
- Protective packaging: plastic bag + labeled transparent plastic box
FAQ
1. What is the difference between models?
Models differ by thread diameter and TPI (threads per inch). All follow UNF standard but are designed for different fine thread specifications.
2. Accuracy vs Resolution — what applies here?
- Accuracy: Defined by ANSI B1.1 Class 2B tolerance
- Resolution: Not applicable, as this is a limit gauge
3. Manual vs Digital — where does this product fit?
This is a manual Go/No-Go inspection gauge, used for pass/fail thread verification without numerical output.
4. Which industries typically use this product?
- Aerospace (high precision threads)
- Automotive
- Precision machining
- Equipment manufacturing
5. Is customization available?
Yes, customization options include:
- Different tolerance classes (e.g., 3B)
- Special thread series (UNEF, special pitch)
- OEM branding and marking
- Calibration certificates (traceable)