Please log in here to access all benefits, including promotional discounts and faster checkouts.
JBO Plug Gauge - UNF (STI) Heli Coil Gauge - Right Hand - 2B - 5/8 x 18 - Calibrated (DAkkS Calibration)
| Thread Form | UNF (STI) |
| Size | 5/8 |
| Pitch | 18 |
| Gauge Type | Plug Gauge (D/E) |
Learn more about Klarna
Description
The JBO UNF (STI) plug gauge is a precision tool designed to verify UNF thread inserts (Helicoil style). It helps engineers, machinists, inspectors, and maintenance teams ensure UNF STI inserts will thread smoothly and perform reliably in critical assemblies. Calibrated to DAkkS traceability and aligned with ANSI/ASME thread standards, this right-hand gauge provides a trusted reference for quality control across manufacturing, automotive, and aerospace applications.
- Calibrated with DAkkS traceability: Provides accurate, auditable measurements that support quality records and compliance for UNF STI inserts.
- Direct pitch-diameter verification: Enables quick checks of insert fit (5/8 x 18 UNF), reducing guesswork and rework by confirming proper engagement.
- Durable, user-friendly design: Rugged construction with a grippy knurled body ensures repeatable readings in busy environments and long tool life.
Using the JBO UNF (STI) plug gauge speeds up inspections, minimizes installation issues, and helps maintain consistent performance across production lines. The DAkkS-calibrated reference supports audits and supplier qualifications, while the sturdy design keeps readings stable and reliable through daily shop-floor use.
Part Numbers
- Protool Part Number
- JBO-512718
- 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 Plug Gauge UNC Heli Coil - Right Hand - 3B - Calibrated (DAkkS Calibration)
View full collection →You are viewing JBO-512718. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512689 | No. 2 | 56 | £167.77 | 5 days | |
| JBO-512692 | No. 4 | 40 | £214.08 | 5 days | |
| JBO-512694 | No. 5 | 40 | £212.97 | 5 days | |
| JBO-512695 | No. 6 | 32 | £197.63 | 5 days | |
| JBO-512697 | No. 8 | 32 | £189.95 | 5 days | |
| JBO-512687 | No. 10 | 24 | £187.75 | 5 days | |
| JBO-512688 | No. 12 | 24 | £204.20 | 5 days | |
| JBO-512700 | 1/4 | 20 | £187.75 | 5 days | |
| JBO-512703 | 5/16 | 18 | £197.63 | 5 days | |
| JBO-512702 | 3/8 | 16 | £211.89 | 5 days | |
| JBO-512699 | 1/2 | 13 | £306.19 | 5 days | |
| JBO-512704 | 5/8 | 11 | £319.34 | 5 days | |
| JBO-513095 | No. 4 | 48 | £227.23 | 5 days | |
| JBO-512707 | No. 6 | 40 | £206.40 | 5 days | |
| JBO-512709 | No. 8 | 36 | £195.44 | 5 days | |
| JBO-512705 | No. 10 | 32 | £187.75 | 5 days | |
| JBO-512712 | 1/4 | 28 | £187.75 | 5 days | |
| JBO-512716 | 5/16 | 24 | £197.63 | 5 days | |
| JBO-512715 | 3/8 | 24 | £211.89 | 5 days | |
| JBO-513343 | 7/16 | 20 | £246.96 | 5 days | |
| JBO-512711 | 1/2 | 20 | £306.19 | 5 days | |
| JBO-512718 Viewing | 5/8 | 18 | £316.05 | 5 days | |
| JBO-512693 | No. 4 | 40 | £298.51 | 5 days | |
| JBO-512696 | No. 6 | 32 | £274.37 | 5 days | |
| JBO-512698 | No. 8 | 32 | £263.41 | 5 days | |
| JBO-512706 | No. 10 | 32 | £259.03 | 5 days | |
| JBO-512713 | 1/4 | 28 | £259.03 | 5 days | |
| JBO-512717 | UNF (STI) | 5/16 | £275.48 | 5 days |
No products match your filters.
