Please log in here to access all benefits, including promotional discounts and faster checkouts.

Asimeto Ring Thread Gauge (NoGo) - BSP (G) - Right Hand - 6g - 1/4 x 19
| Thread Form | BSP (G) |
| Size | 1/4 |
| Pitch | 19 |
| Gauge Type | Ring Gauge (NoGo) |
Learn more about Klarna
Compatible certification
The ones our customers buy most.Description
The Asimeto Ring Thread Gauge (NoGo) BSP (G) Right Hand - 6g - 1/4 x 19 is a precision tool designed to verify the external threads on BSP and BSPP fittings. It’s suitable for a wide range of users—from engineers and buyers to tradespeople and hobbyists—who need quick, reliable thread checks in a workshop or on-site environment.
Part of the 690 Series, this NOGO gauge is built to conform to the 6G tolerance class, delivering accurate and repeatable inspections. It features a threaded bore sized to the target thread size and pitch, enabling fast verification of tested parts. Constructed from durable materials, it is designed for long-lasting performance in demanding conditions.
- 6G tolerance class compliance: Provides precise, repeatable verification of BSP/BSPP external threads for reliable quality checks.
- Threaded bore matched to size and pitch: Enables quick Go/No-Go checks by comparing to the target thread size and pitch, speeding inspection.
- Durable, high-quality construction: Built to withstand daily use in busy workshops, delivering long-term performance.
Using the gauge helps you confirm correct thread engagement before assembly, reduces inspection time, and supports consistent results across fittings. Its sturdy design ensures dependable performance through repeated checks, helping you complete projects efficiently and with confidence.
Part Numbers
- Protool Part Number
- 690-03-4
- Brand
- Asimeto
- Category
- Gauge
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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 Gauge - NOGO - BSP/BSPP 6G - 690 Series
View full collection →You are viewing 690-03-4. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| 690-01-4 | 1/16 | 28 | £70.43 | In Stock | |
| 690-02-4 | 1/8 | 28 | £61.43 | 4 weeks | |
| 690-03-4 Viewing | 1/4 | 19 | £61.43 | In Stock | |
| 690-04-4 | 3/8 | 19 | £57.15 | 4 weeks | |
| 690-05-4 | 1/2 | 14 | £78.66 | In Stock | |
| 690-06-4 | 5/8 | 14 | £77.85 | 4 weeks | |
| 690-07-4 | 3/4 | 14 | £70.43 | In Stock | |
| 690-08-4 | 7/8 | 14 | £81.00 | In Stock | |
| 690-09-4 | 1 | 11 | £89.24 | In Stock | |
| 690-10-4 | 1 1/8 | 11 | £99.00 | In Stock | |
| 690-11-4 | 1 1/4 | 11 | £109.94 | In Stock | |
| 690-12-4 | 1 1/2 | 11 | £111.51 | 4 weeks | |
| 690-13-4 | 1 3/4 | 11 | £143.24 | In Stock | |
| 690-14-4 | 2 | 11 | £144.41 | In Stock | |
| 690-15-4 | 2 1/4 | 11 | £206.60 | In Stock | |
| 690-16-4 | 2 1/2 | 11 | £263.75 | 4 weeks | |
| 690-17-4 | 2 3/4 | 11 | £311.49 | 4 weeks | |
| 690-18-4 | 3 | 11 | £350.60 | 4 weeks |
No products match your filters.



