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JBO Plug Gauge - UNC (STI) Heli Coil Gauge - Right Hand - 2B - 3/8 x 16 - Calibrated (DAkkS Calibration)
| Thread Form | UNC (STI) |
| Size | 3/8 |
| Pitch | 16 |
| Gauge Type | Plug Gauge (D/E) |
| Thread Direction | Right Hand |
| Tolerance | 2B |
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The JBO Plug Gauge - UNC (STI) Heli Coil Gauge is a right-hand plug gauge designed for UNC (Unified National Coarse) screw thread inserts (STIs). It is tailored for inspecting UNC STI wire inserts, enabling precise pitch-diameter checks to confirm proper fit and function. This gauge is widely used in manufacturing, automotive, and aerospace industries to ensure inserts meet UNC STI specifications.
Calibrated to DAkkS standards and manufactured in accordance with ANSI/ASME thread specifications, this gauge delivers traceable, repeatable measurements you can rely on. The meticulous design and precise dimensions support consistent acceptance testing on the shop floor or in the quality lab.
- UNC (STI) compatibility and pitch-diameter verification: Designed specifically for UNC STI wire inserts, enabling accurate pitch-diameter measurement to verify proper fit and performance.
- DAkkS calibration and ANSI/ASME compliance: Calibrated to DAkkS standards with ANSI/ASME thread specifications, ensuring traceable accuracy and reliable results across audits and quality checks.
- Right-hand, 3/8 x 16 size: Right-hand gauge sized for 3/8 x 16 UNC inserts, providing straightforward, field-friendly inspection on standard components.
Using this gauge sharpens your quality control by delivering quick, dependable pitch-diameter readings, helping you catch mismatches before assembly and reduce rework. The DAkkS-calibrated, ANSI/ASME-compliant design gives you confidence in your measurement records for audits and supplier qualifications, while the compact, proven design integrates smoothly into routine inspection workflows on manufacturing lines, maintenance bays, and repair shops.
| Thread Form | UNC (STI) |
| Size | 3/8 |
| Pitch | 16 |
| Gauge Type | Plug Gauge (D/E) |
| Thread Direction | Right Hand |
| Tolerance | 2B |
| Calibration | DAkkS Calibration Cert |
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-512702. 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 | £151.32 | 5 days | |
| JBO-512694 | No. 5 | 40 | £150.21 | 5 days | |
| JBO-512695 | No. 6 | 32 | £134.87 | 5 days | |
| JBO-512697 | No. 8 | 32 | £127.21 | 5 days | |
| JBO-512687 | No. 10 | 24 | £124.99 | 5 days | |
| JBO-512688 | No. 12 | 24 | £141.45 | 5 days | |
| JBO-512700 | 1/4 | 20 | £124.99 | 5 days | |
| JBO-512703 | 5/16 | 18 | £134.87 | 5 days | |
| JBO-512702 Viewing | 3/8 | 16 | £149.13 | 5 days | |
| JBO-512699 | 1/2 | 13 | £243.43 | 5 days | |
| JBO-512704 | 5/8 | 11 | £256.58 | 5 days | |
| JBO-513095 | No. 4 | 48 | £164.47 | 5 days | |
| JBO-512707 | No. 6 | 40 | £143.64 | 5 days | |
| JBO-512709 | No. 8 | 36 | £132.68 | 5 days | |
| JBO-512705 | No. 10 | 32 | £124.99 | 5 days | |
| JBO-512712 | 1/4 | 28 | £124.99 | 5 days | |
| JBO-512716 | 5/16 | 24 | £134.87 | 5 days | |
| JBO-512715 | 3/8 | 24 | £149.13 | 5 days | |
| JBO-513343 | 7/16 | 20 | £184.22 | 5 days | |
| JBO-512711 | 1/2 | 20 | £243.43 | 5 days | |
| JBO-512718 | 5/8 | 18 | £253.31 | 5 days | |
| JBO-512693 | No. 4 | 40 | £235.75 | 5 days | |
| JBO-512696 | No. 6 | 32 | £211.63 | 5 days | |
| JBO-512698 | No. 8 | 32 | £200.65 | 5 days | |
| JBO-512706 | No. 10 | 32 | £196.27 | 5 days | |
| JBO-512713 | 1/4 | 28 | £196.27 | 5 days | |
| JBO-512717 | UNF (STI) | 5/16 | £212.72 | 5 days |
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