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Asimeto Ring Thread Gauge (Go/NoGo) - Imperial - Right Hand - ASMEB1.20.1-2013 - 1/4 x 18
| Thread Form | NPT |
| Size | 1/4 |
| Pitch | 18 |
| Gauge Type | Ring Gauge (Go/NoGo) |
| Thread Direction | Right Hand |
| Tolerance | ASMEB1.20.1-2013 |
Learn more about Klarna
The Asimeto Ring Thread Gauge (Go/NoGo), Imperial, Right-Hand, 1/4 x 18, is a precision external thread inspection tool built for machinists and quality-control teams. It delivers fast, reliable pass/fail verification of thread depth and tolerance in line with ASMEB1.20.1-2013 standards.
- Go/NoGo Design: Clear pass/fail checks for external threads, enabling quick decisions on part eligibility.
- 3-Step L3 Configuration: A three-step contact profile that targets the critical thread engagement zones for accurate depth and tolerance verification.
- Imperial Right-Hand 1/4 x 18 Size: Precisely matches imperial thread specifications — 1/4" major diameter with 18 threads per inch, right-hand orientation.
- ASMEB1.20.1-2013 Compliant: Manufactured to the standard’s exact dimensions and tolerances to support consistent QA processes.
- External Thread Inspection Tool: Specifically designed to assess external threads on fasteners and machined components, reducing guesswork in assembly fits.
Using this gauge helps you catch under- or over-tolerance threads early in production, minimize rework, and ensure reliable mating with fasteners and threaded parts. It’s ideal for in-process checks on lathes, mills, and thread-cutting operations, as well as incoming inspection when parts arrive from suppliers. With its precise geometry and straightforward Go/NoGo feedback, you’ll achieve repeatable measurements across operators and shifts.
| Thread Form | NPT |
| Size | 1/4 |
| Pitch | 18 |
| Gauge Type | Ring Gauge (Go/NoGo) |
| Thread Direction | Right Hand |
| Tolerance | ASMEB1.20.1-2013 |
| Middle Diameter Size | 0.49163 |
| Gauge Tolerance | ± 0.0003 |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Asimeto Ring Thread Gauges (Go/NoGo) - Imperial - Right Hand - ASMEB1.20.1-2013
View full collection →You are viewing 690-42-3. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Middle Diameter Size | Gauge Tolerance | Price | Stock | Order |
|---|---|---|---|---|---|---|---|
| 690-40-3 | 1/16 | 27 | 0.28118 | ± 0.0003 | £133.83 | In Stock | |
| 690-41-3 | 1/8 | 27 | 0.37360 | ± 0.0003 | £151.43 | In Stock | |
| 690-42-3 Viewing | 1/4 | 18 | 0.49163 | ± 0.0003 | £164.34 | 4 weeks | |
| 690-43-3 | 3/8 | 18 | 0.62701 | ± 0.0003 | £216.41 | In Stock | |
| 690-44-3 | 1/2 | 14 | 0.77843 | ± 0.0003 | £260.60 | In Stock | |
| 690-45-3 | 3/4 | 14 | 0.98887 | ± 0.0003 | £294.66 | 4 weeks | |
| 690-46-3 | 1 | 11.5 | 1.23863 | ± 0.0004 | £328.68 | 4 weeks | |
| 690-47-3 | 1.1/4 | 11.5 | 1.58338 | ± 0.0004 | £459.00 | 4 weeks | |
| 690-48-3 | 1.1/2 | 11.5 | 1.82234 | ± 0.0004 | £493.43 | 4 weeks | |
| 690-49-3 | 2 | 11.5 | 2.29627 | ± 0.0004 | £520.07 | 4 weeks | |
| 690-50-3 | 2.1/2 | 8 | 2.76216 | ± 0.0005 | £542.75 | 4 weeks | |
| 690-51-3 | 3 | 8 | 3.38850 | ± 0.0005 | £570.15 | 4 weeks |
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