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JBO Thread Plug Gauge (NoGo) - Metric Coarse - Left Hand - 6H - M45 x 4.5
| Thread Form | Metric |
| Size | M45 |
| Pitch | 4.5 |
| Gauge Type | Plug Gauge (NoGo) |
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Description
The JBO Thread Plug Gauge (NoGo) – Metric Coarse, Left Hand, 6H, M45 x 4.5 – is a precision inspection tool designed to quickly verify the size of internal threaded holes. Built for quality control, machining, assembly, and maintenance teams, it helps ensure threaded connections will meet spec and function reliably in real-world applications.
Crafted from hardened steel for durability and long life, this NoGo gauge is built to withstand daily shop conditions. The left-hand thread configuration and exact M45 x 4.5 dimensions provide a dependable reference for verifying hole size, so you can trust your assemblies from first run to final production.
- Exact NoGo for M45 x 4.5 metric coarse threads: quickly confirms holes do not exceed maximum size, helping prevent mismatches and costly rework.
- Left-Hand thread compatibility: specifically designed to inspect left-handed threaded holes, reducing read errors and ensuring correct fits.
- Rugged, ergonomic construction: hardened steel body with a knurled grip delivers durable, repeatable readings and comfortable handling—even with gloves.
This gauge streamlines quality checks by delivering fast, repeatable measurements that improve workflow and reduce downtime. Its robust design supports consistent performance across inspections, giving you confidence in every threaded connection and helping you meet tight tolerances with less guesswork.
Part Numbers
- Protool Part Number
- JBO-516961
- Brand
- JBO
- 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: JBO Thread Plug Gauges (NoGo) - Metric Coarse
View full collection →You are viewing JBO-516961. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-510383 | M42 | 4.5 | £99.91 | 5 days | |
| JBO-510395 | M45 | 4.5 | £108.33 | 5 days | |
| JBO-510408 | M48 | 5 | £116.23 | 5 days | |
| JBO-510444 | M52 | 5 | £124.99 | 5 days | |
| JBO-510457 | M56 | 5.5 | £137.06 | 5 days | |
| JBO-510482 | M60 | 5.5 | £155.70 | 5 days | |
| JBO-510492 | M64 | 6 | £171.05 | 5 days | |
| JBO-513505 | M68 | 6 | £180.92 | 5 days | |
| JBO-514600 | M42 | 4.5 | £126.10 | 5 days | |
| JBO-516961 Viewing | M45 | 4.5 | £134.87 | 5 days | |
| JBO-510409 | M48 | 5 | £148.02 | 5 days | |
| JBO-517178 | M52 | 5 | £159.00 | 5 days |
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