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VCOIL Plug Gauge (GO) - UN (STI) - Heli Coil Gauge - Right Hand - 3B - 1.5/8 x 8
| Thread Form | UN (STI) |
| Size | 1.5/8 |
| Pitch | 8 |
| Gauge Type | Plug Gauge (GO) |
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Description
The VÖLKEL VCOIL Plug Gauge (GO) for UN (STI) Helicoil threads is a precision tool designed for reliable, hand-operated thread verification in quality-controlled environments. It targets manufacturers and inspectors who need ANSI-compliant go-gauging for straight, true thread conformity.
- Thread system: UN (STI) Go gauge aligned with ANSI/ASME thread standards for Helicoil inserts.
- Gauge type and purpose: Go plug gauge designed to verify that the thread hole accepts a standard Helicoil insert according to spec.
- Operation: The GO gauge must screw into the thread cut in a part by hand, without using excessive force; if it cannot, the thread does not meet the standard.
- Orientation: Right Hand.
- Size designation: 3B – 1.5/8 x 8.
- Standard alignment: Manufactured and assessed to ANSI standards; part of Helicoil gauge family.
- Calibration and traceability: Factory calibration certificate available upon request (price on request); calibrated at a measurement laboratory separate from VÖLKEL to DIN, ISO, ANSI specifications for the respective specimen; calibrated using IAC thread scanners.
- Reference temperature: 20° Celsius for parts and gauges.
Benefits: This go gauge provides quick, repeatable verification of thread conformity to ANSI/ASME standards, helping to prevent mismatches before assembly and reducing scrap. The option to obtain a factory calibration certificate ensures traceability for quality audits and supplier qualification, with independent calibration conducted to recognized DIN, ISO, and ANSI standards using IAC thread scanning technology. Ideal for in-process checks, incoming inspection, and final quality assurance of Helicoil-installed threads.
Part Numbers
- Protool Part Number
- TC-19951
- Brand
- VCOIL
- 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: VCOIL Plug Gauges UN (STI)
View full collection →You are viewing TC-19951. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| TC-19844 | 1.1/8 | 8 | £266.33 | 7 days | |
| TC-19845 | 1.1/4 | 8 | £303.43 | 7 days | |
| TC-19846 | 1.38 | 8 | £212.00 | 7 days | |
| TC-19847 | 1.3/8 | 8 | £212.00 | 7 days | |
| TC-19848 | 1.1/2 | 8 | £200.08 | 7 days | |
| TC-19849 | 1.1/2 | 8 | £200.08 | 7 days | |
| TC-19850 | 1.5/8 | 8 | £200.08 | 7 days | |
| TC-19851 | 1.5/8 | 8 | £200.08 | 7 days | |
| TC-19852 | 1.3/4 | 8 | £232.83 | 7 days | |
| TC-19853 | 1.3/4 | 8 | £230.55 | 7 days | |
| TC-19854 | 1.7/8 | 8 | £230.55 | 7 days | |
| TC-19855 | 1.7/8 | 8 | £230.55 | 7 days | |
| TC-19856 | 2 | 8 | £247.78 | 7 days | |
| TC-19857 | 2 | 8 | £247.78 | 7 days | |
| TC-19944 | 1.1/8 | 8 | £319.33 | 7 days | |
| TC-19945 | 1.1/4 | 8 | £364.38 | 7 days | |
| TC-19946 | 1.3/8 | 8 | £254.40 | 7 days | |
| TC-19947 | 1.3/8 | 8 | £254.40 | 7 days | |
| TC-19948 | 1.1/2 | 8 | £241.15 | 7 days | |
| TC-19949 | 1.1/2 | 8 | £241.15 | 7 days | |
| TC-19950 | 1.5/8 | 8 | £241.15 | 7 days | |
| TC-19951 Viewing | 1.5/8 | 8 | £241.15 | 7 days | |
| TC-19952 | 1.3/4 | 8 | £275.60 | 7 days | |
| TC-19953 | 1.3/4 | 8 | £275.60 | 7 days | |
| TC-19954 | 1.7/8 | 8 | £275.60 | 7 days | |
| TC-19955 | 1.7/8 | 8 | £275.60 | 7 days | |
| TC-19956 | 2 | 8 | £298.13 | 7 days | |
| TC-19957 | 2 | 8 | £298.13 | 7 days |
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