Please log in here to access all benefits, including promotional discounts and faster checkouts.
JBO Thread Plug Gauge (GO) - UNC - Right Hand - 2B - 2 1/4 x 4.5
| Thread Form | UNC |
| Size | 2 1/4 |
| Pitch | 4.5 |
| Gauge Type | Plug Gauge (NoGo) |
Learn more about Klarna
Compatible certification
The ones our customers buy most.
Description
The JBO Thread Plug Gauge (GO) is a precision inspection tool engineered to verify threaded holes meet UNC standards. It’s an essential asset for manufacturing floors, automotive shops, and aerospace QA teams that rely on quick, reliable go checks to confirm hole readiness and proper fit with the mating bolt.
- Precise UNC 2B Go Verification: Confirms that threaded holes meet the Unified Thread Standard for right-hand threads in the 2 1/4 x 4.5 size, helping reduce misfits and rework in production and assembly.
- Ergonomic, Knurled Body for Fast Handling: The textured grip provides secure, comfortable handling and easy alignment, even when gloves are in use, speeding inspections on busy shop floors.
- Durable, Reliable Geometry: Built to withstand daily use in demanding environments, delivering consistent go checks across lots and batches for dependable quality control.
Using this GO gauge supports efficient quality assurance by quickly validating hole readiness, improving workflow, and reducing downstream fitting issues. It helps you move parts through inspection with confidence, maintain tighter process control, and achieve more consistent, reliable results across production runs.
Part Numbers
- Protool Part Number
- JBO-513179
- 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) - Unified
View full collection →You are viewing JBO-513179. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-510588 | 1 3/4 | 5 | £126.10 | 5 days | |
| JBO-510591 | 2 | 4.5 | £144.74 | 5 days | |
| JBO-513179 Viewing | 2 1/4 | 4.5 | £157.90 | 5 days | |
| JBO-513618 | 2 1/2 | 4 | £176.54 | 5 days | |
| JBO-514465 | 2 3/4 | 4 | £196.27 | 5 days | |
| JBO-510663 | 1 5/8 | 12 | £259.88 | 5 days | |
| JBO-513513 | 1 3/4 | 12 | £259.88 | 5 days | |
| JBO-510666 | 1 7/8 | 12 | £286.19 | 5 days | |
| JBO-513045 | 2 | 12 | £300.45 | 5 days | |
| JBO-514512 | 1 5/8 | 8 | £278.53 | 5 days | |
| JBO-510661 | 1 3/4 | 8 | £304.83 | 5 days | |
| JBO-510670 | 2 | 8 | £346.50 | 5 days |
No products match your filters.
