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JBO Thread Ring Gauge (NoGo) - BSF - Right Hand - Medium Class - 3/8 x 20
| Thread Form | BSF |
| Size | 3/8 |
| Pitch | 20 |
| Gauge Type | Ring Gauge (NoGo) |
| Thread Direction | Right Hand |
| Tolerance | Medium Class |
Learn more about Klarna
The JBO Thread Ring Gauge (NoGo) in BSF, Right Hand, Medium Class, 3/8 x 20 is a precision inspection tool designed to verify external thread diameters on fasteners and threaded components. It’s ideal for professionals across manufacturing, automotive, and aerospace sectors, as well as quality-control teams, who need quick, reliable checks to confirm parts meet thread standards.
With its NoGo design, non-conforming threads are easy to identify, helping prevent misfits and ensuring proper fit and function. Crafted from hardened steel, this gauge stands up to daily use in busy workshops while maintaining accurate measurements.
- NoGo-based quick pass/fail assessment: delivers a clear, fast indication of whether 3/8 x 20 BSF right-hand threads are within tolerance, speeding up inspections and reducing guesswork.
- Rugged, easy-to-handle construction: hardened steel with a knurled edge provides durable performance and secure grip in challenging environments.
- Precise, standard-compliant sizing: specifically matched to BSF 3/8 x 20, right-hand, medium class, aligned with Unified thread standards for reliable, repeatable results.
Using this gauge on threaded components helps streamline quality checks, minimize rework, and improve overall workflow. Its durable build and clear pass/fail indications support faster, more confident decisions on fitment and assembly, enhancing consistency across production runs and supplier partnerships.
| Thread Form | BSF |
| Size | 3/8 |
| Pitch | 20 |
| Gauge Type | Ring Gauge (NoGo) |
| Thread Direction | Right Hand |
| Tolerance | Medium Class |
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: JBO Thread Ring Gauges (NoGo) - BSF
View full collection →You are viewing JBO-501169. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-520239 | 3/16 | 32 | £100.34 | 5 days | |
| JBO-520240 | 7/32 | 28 | £108.02 | 5 days | |
| JBO-501168 | 1/4 | 26 | £92.89 | 5 days | |
| JBO-520241 | 9/32 | 26 | £108.02 | 5 days | |
| JBO-501170 | 5/16 | 22 | £97.49 | 5 days | |
| JBO-501169 Viewing | 3/8 | 20 | £105.26 | 5 days | |
| JBO-520242 | 7/16 | 18 | £114.03 | 5 days | |
| JBO-501167 | 1/2 | 16 | £116.23 | 5 days | |
| JBO-507252 | 9/16 | 16 | £129.40 | 5 days | |
| JBO-520243 | 5/8 | 14 | £132.68 | 5 days | |
| JBO-520244 | 11/16 | 14 | £161.19 | 5 days | |
| JBO-505546 | 3/4 | 12 | £150.21 | 5 days | |
| JBO-540017 | 7/8 | 11 | £168.86 | 5 days | |
| JBO-501166 | 1 | 10 | £194.08 | 5 days |
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