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

JBO Thread Plug Gauge - Pg Go-No/Go - Right Hand - Pg 21 x 16
| Thread Form | Pg |
| Size | Pg 21 |
| Pitch | 16 |
| Gauge Type | Plug Gauge (D/E) |
| Thread Direction | Right Hand |
| Tolerance | N/A |
Learn more about Klarna
The JBO Thread Plug Gauge in a right-hand Go-No/Go configuration provides fast, reliable verification of threaded holes to exact Unified thread standards. Designed for use across manufacturing, automotive, and aerospace environments, this gauge helps inspectors confirm whether a threaded hole accepts the correct thread size and pitch with confidence.
Its straightforward Go/No-Go design lets you quickly distinguish conforming threads from non-conforming ones, reducing guesswork and rework while speeding up quality checks on busy production lines.
- Fast Go/No-Go Verification: Instantly confirms thread conformity against standard sizes, cutting inspection time and improving first-pass yield on the shop floor.
- Right-Hand Pg 21 x 16 Compatibility: Precisely matched to the Pg 21 x 16 right-hand thread, ensuring accurate readings and reliable hole inspection every time.
- Rugged, Ergonomic Design: Knurled, durable construction with corrosion-resistant fittings delivers comfortable handling and long service life in demanding environments.
This plug gauge supports streamlined quality control by delivering clear, binary results that maintenance teams and auditors can trust. By verifying threaded holes meet the correct size and pitch, it enhances fitment with mating parts, reduces downtime from misfits, and promotes consistent performance across assemblies in manufacturing, automotive, and aerospace applications.
| Thread Form | Pg |
| Size | Pg 21 |
| Pitch | 16 |
| Gauge Type | Plug Gauge (D/E) |
| Thread Direction | Right Hand |
| Tolerance | N/A |
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 Plug Gauges - Pg Go-No/Go
View full collection →You are viewing JBO-512487. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512492 | Pg 7 | 20 | £76.53 | 5 days | |
| JBO-512493 | Pg 9 | 18 | £84.55 | 5 days | |
| JBO-512484 | Pg 11 | 18 | £95.74 | 5 days | |
| JBO-512485 | Pg 13.5 | 18 | £102.98 | 5 days | |
| JBO-512486 | Pg 16 | 18 | £109.65 | 5 days | |
| JBO-512487 Viewing | Pg 21 | 16 | £129.40 | 5 days | |
| JBO-512488 | Pg 29 | 16 | £172.16 | 5 days |
No products match your filters.


