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JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M20 x 1
SKU:JBO-500458
The JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M20 x 1 is a precision measuring tool designed to verify external thread diameters. It’s ideal for engineers, machinists, quality...
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Specifications at a glance
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| Thread Form | Metric |
| Size | M20 |
| Pitch | 1 |
| Gauge Type | Ring Gauge (NoGo) |
£91.90
Prices shown ex. VAT
5 days estimated lead time
— subject to availability
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Learn more about Klarna
Compatible certification
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Description
The JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M20 x 1 is a precision measuring tool designed to verify external thread diameters. It’s ideal for engineers, machinists, quality teams, tradespeople, and hobbyists who need reliable, standards-aligned thread checks without guesswork.
Crafted from hardened steel for strength and wear resistance, this NoGo gauge delivers dependable performance in demanding environments. Its simple, intuitive design helps quickly identify non-conforming threads, supporting efficient quality control and precise engineering processes.
- Hardened steel construction with knurled edge: Built to withstand daily workshop use, with a secure grip that makes measurements fast and repeatable, even when wearing gloves.
- NoGo quick-check design for fast pass/fail: Enables instant determination of out-of-tolerance threads, speeding inspections and reducing the risk of accepting defective components.
- Metric Fine, M20 x 1, Right-Hand compatibility: Precisely calibrated for common metric fasteners, ensuring accurate seating and reliable readings for right-hand threads in M20 x 1 applications.
Using the JBO Thread Ring Gauge streamlines your inspection workflow by delivering clear, consistent results. It helps you move parts faster, document conformity with ease, and maintain high-quality standards across assemblies, improving overall reliability in your manufacturing or maintenance operations.
Part Numbers
- Protool Part Number
- JBO-500458
- Brand
- JBO
- Category
- Gauge
No downloads are attached to this product yet.
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
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.
Ask our technical team about this tool
Full Range: JBO Thread Ring Gauges (NoGo) - Metric Fine
View full collection →You are viewing JBO-500458. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-500636 | M30 | 1.5 | £117.33 | 5 days | |
| JBO-501027 | M9 | 0.5 | £84.12 | 5 days | |
| JBO-500640 | M30 | 1.5 | £149.13 | 5 days | |
| JBO-500346 | M16 | 1 | £100.01 | 5 days | |
| JBO-503269 | M14 | 1 | £92.11 | 5 days | |
| JBO-506216 | M36 | 1 | £203.95 | 5 days | |
| JBO-500294 | M14 | 1 | £100.22 | 5 days | |
| JBO-500243 | M12 | 1 | £82.90 | 5 days | |
| JBO-501006 | M8 | 1 | £59.98 | 5 days | |
| JBO-500196 | M100 | 4 | £514.27 | 5 days | |
| JBO-503215 | M68 | 4 | £324.56 | 5 days | |
| JBO-501044 | M95 | 2 | £383.79 | 5 days | |
| JBO-500979 | M78 | 2 | £335.54 | 5 days | |
| JBO-500968 | M72 | 2 | £314.71 | 5 days | |
| JBO-500892 | M58 | 2 | £218.21 | 5 days | |
| JBO-500782 | M42 | 2 | £163.39 | 5 days | |
| JBO-500546 | M25 | 2 | £108.78 | 5 days | |
| JBO-520173 | M118 | 1.5 | £595.41 | 5 days | |
| JBO-500553 | M26 | 1.5 | £105.92 | 5 days | |
| JBO-500464 | M20 | 1.5 | £86.62 | 5 days | |
| JBO-500323 | M15 | 1.5 | £88.60 | 5 days | |
| JBO-500793 | M45 | 1 | £196.27 | 5 days | |
| JBO-500652 | M32 | 1 | £143.64 | 5 days | |
| JBO-500537 | M25 | 1 | £115.14 | 5 days | |
| JBO-500266 | M13 | 1 | £88.27 | 5 days | |
| JBO-500758 | M4.5 | 0.5 | £93.76 | 5 days | |
| JBO-505503 | M52 | 3 | £276.31 | 5 days | |
| JBO-503407 | M48 | 3 | £246.71 | 5 days | |
| JBO-505496 | M45 | 3 | £241.24 | 5 days | |
| JBO-505491 | M42 | 3 | £223.68 | 5 days | |
| JBO-505484 | M39 | 3 | £209.44 | 5 days | |
| JBO-500709 | M36 | 3 | £199.57 | 5 days | |
| JBO-506315 | M33 | 3 | £203.95 | 5 days | |
| JBO-506314 | M30 | 3 | £186.41 | 5 days | |
| JBO-505533 | M85 | 2 | £432.04 | 5 days | |
| JBO-543165 | M82 | 2 | £458.34 | 5 days | |
| JBO-505530 | M80 | 2 | £411.20 | 5 days | |
| JBO-540981 | M78 | 2 | £445.19 | 5 days | |
| JBO-505223 | M76 | 2 | £429.85 | 5 days | |
| JBO-505523 | M75 | 2 | £369.53 | 5 days | |
| JBO-543591 | M72 | 2 | £416.67 | 5 days | |
| JBO-505520 | M70 | 2 | £339.93 | 5 days | |
| JBO-505516 | M68 | 2 | £339.93 | 5 days | |
| JBO-506532 | M65 | 2 | £327.86 | 5 days | |
| JBO-505512 | M64 | 2 | £311.41 | 5 days | |
| JBO-506531 | M62 | 2 | £310.32 | 5 days | |
| JBO-500929 | M60 | 2 | £285.10 | 5 days | |
| JBO-500893 | M58 | 2 | £301.53 | 5 days | |
| JBO-500886 | M56 | 2 | £274.12 | 5 days | |
| JBO-505504 | M55 | 2 | £268.65 | 5 days | |
| JBO-500868 | M52 | 2 | £259.88 | 5 days | |
| JBO-500858 | M50 | 2 | £241.24 | 5 days | |
| JBO-500817 | M48 | 2 | £233.56 | 5 days | |
| JBO-500799 | M45 | 2 | £228.09 | 5 days | |
| JBO-504062 | M42 | 2 | £209.44 | 5 days | |
| JBO-500769 | M40 | 2 | £211.63 | 5 days | |
| JBO-500732 | M39 | 2 | £202.87 | 5 days | |
| JBO-505481 | M38 | 2 | £199.57 | 5 days | |
| JBO-500707 | M36 | 2 | £176.54 | 5 days | |
| JBO-500674 | M33 | 2 | £168.86 | 5 days | |
| JBO-503326 | M32 | 2 | £172.16 | 5 days | |
| JBO-500645 | M30 | 2 | £154.62 | 5 days | |
| JBO-506530 | M28 | 2 | £164.47 | 5 days | |
| JBO-500579 | M27 | 2 | £150.21 | 5 days | |
| JBO-505474 | M26 | 2 | £155.70 | 5 days | |
| JBO-505473 | M25 | 2 | £150.21 | 5 days | |
| JBO-500532 | M24 | 2 | £130.48 | 5 days | |
| JBO-504061 | M22 | 2 | £129.40 | 5 days | |
| JBO-500473 | M20 | 2 | £121.72 | 5 days | |
| JBO-505458 | M18 | 2 | £123.91 | 5 days | |
| JBO-506250 | M85 | 1.5 | £432.04 | 5 days | |
| JBO-506249 | M82 | 1.5 | £411.20 | 5 days | |
| JBO-506248 | M80 | 1.5 | £390.37 | 5 days | |
| JBO-506247 | M78 | 1.5 | £389.26 | 5 days | |
| JBO-506246 | M75 | 1.5 | £359.66 | 5 days | |
| JBO-506245 | M72 | 1.5 | £339.93 | 5 days | |
| JBO-506244 | M70 | 1.5 | £338.82 | 5 days | |
| JBO-506243 | M68 | 1.5 | £313.60 | 5 days | |
| JBO-505513 | M65 | 1.5 | £312.51 | 5 days | |
| JBO-505884 | M64 | 1.5 | £308.13 | 5 days | |
| JBO-506242 | M62 | 1.5 | £298.26 | 5 days | |
| JBO-503667 | M60 | 1.5 | £279.61 | 5 days | |
| JBO-503995 | M58 | 1.5 | £277.42 | 5 days | |
| JBO-500882 | M56 | 1.5 | £264.27 | 5 days | |
| JBO-503499 | M55 | 1.5 | £257.69 | 5 days | |
| JBO-503463 | M52 | 1.5 | £241.24 | 5 days | |
| JBO-500856 | M50 | 1.5 | £232.47 | 5 days | |
| JBO-500814 | M48 | 1.5 | £228.09 | 5 days | |
| JBO-500796 | M45 | 1.5 | £211.63 | 5 days | |
| JBO-500781 | M42 | 1.5 | £201.76 | 5 days | |
| JBO-500767 | M40 | 1.5 | £189.69 | 5 days | |
| JBO-500730 | M39 | 1.5 | £209.44 | 5 days | |
| JBO-500721 | M38 | 1.5 | £183.12 | 5 days | |
| JBO-500704 | M36 | 1.5 | £173.24 | 5 days | |
| JBO-500692 | M35 | 1.5 | £172.16 | 5 days | |
| JBO-500683 | M34 | 1.5 | £175.43 | 5 days | |
| JBO-500670 | M33 | 1.5 | £169.96 | 5 days | |
| JBO-500661 | M32 | 1.5 | £161.19 | 5 days | |
| JBO-500590 | M28 | 1.5 | £143.64 | 5 days | |
| JBO-500574 | M27 | 1.5 | £141.45 | 5 days | |
| JBO-500557 | M26 | 1.5 | £134.87 | 5 days | |
| JBO-503236 | M25 | 1.5 | £131.59 | 5 days | |
| JBO-500528 | M24 | 1.5 | £124.99 | 5 days | |
| JBO-500498 | M22 | 1.5 | £117.33 | 5 days | |
| JBO-500470 | M20 | 1.5 | £109.65 | 5 days | |
| JBO-500393 | M18 | 1.5 | £99.68 | 5 days | |
| JBO-503771 | M17 | 1.5 | £143.64 | 5 days | |
| JBO-500359 | M16 | 1.5 | £92.23 | 5 days | |
| JBO-503758 | M15 | 1.5 | £111.84 | 5 days | |
| JBO-500307 | M14 | 1.5 | £84.33 | 5 days | |
| JBO-500255 | M12 | 1.5 | £86.52 | 5 days | |
| JBO-503439 | M14 | 1.25 | £121.72 | 5 days | |
| JBO-500249 | M12 | 1.25 | £109.65 | 5 days | |
| JBO-500192 | M10 | 1.25 | £89.47 | 5 days | |
| JBO-506126 | M60 | 1 | £337.73 | 5 days | |
| JBO-506124 | M58 | 1 | £327.86 | 5 days | |
| JBO-506122 | M56 | 1 | £312.51 | 5 days | |
| JBO-506120 | M55 | 1 | £301.53 | 5 days | |
| JBO-506118 | M52 | 1 | £285.10 | 5 days | |
| JBO-505955 | M50 | 1 | £294.96 | 5 days | |
| JBO-506117 | M48 | 1 | £265.35 | 5 days | |
| JBO-503257 | M45 | 1 | £250.01 | 5 days | |
| JBO-502994 | M42 | 1 | £234.66 | 5 days | |
| JBO-503268 | M40 | 1 | £229.17 | 5 days | |
| JBO-505480 | M38 | 1 | £210.53 | 5 days | |
| JBO-500701 | M36 | 1 | £203.95 | 5 days | |
| JBO-505478 | M35 | 1 | £197.38 | 5 days | |
| JBO-500679 | M34 | 1 | £198.46 | 5 days | |
| JBO-502989 | M33 | 1 | £187.50 | 5 days | |
| JBO-500654 | M32 | 1 | £183.12 | 5 days | |
| JBO-500634 | M30 | 1 | £162.28 | 5 days | |
| JBO-500586 | M28 | 1 | £163.39 | 5 days | |
| JBO-500568 | M27 | 1 | £162.28 | 5 days | |
| JBO-500551 | M26 | 1 | £153.51 | 5 days | |
| JBO-503314 | M25 | 1 | £148.02 | 5 days | |
| JBO-500522 | M24 | 1 | £139.25 | 5 days | |
| JBO-506148 | M23 | 1 | £155.70 | 5 days | |
| JBO-500490 | M22 | 1 | £133.78 | 5 days | |
| JBO-506147 | M21 | 1 | £148.02 | 5 days | |
| JBO-500462 | M20 | 1 | £116.23 | 5 days | |
| JBO-500402 | M19 | 1 | £135.97 | 5 days | |
| JBO-500382 | M18 | 1 | £109.65 | 5 days | |
| JBO-500368 | M17 | 1 | £119.52 | 5 days | |
| JBO-500349 | M16 | 1 | £97.93 | 5 days | |
| JBO-500322 | M15 | 1 | £119.52 | 5 days | |
| JBO-500295 | M14 | 1 | £90.25 | 5 days | |
| JBO-500269 | M13 | 1 | £111.84 | 5 days | |
| JBO-500244 | M12 | 1 | £83.77 | 5 days | |
| JBO-502746 | M11 | 1 | £91.90 | 5 days | |
| JBO-500185 | M10 | 1 | £73.91 | 5 days | |
| JBO-501037 | M9 | 1 | £81.15 | 5 days | |
| JBO-501008 | M8 | 1 | £66.02 | 5 days | |
| JBO-506145 | M28 | 0.75 | £208.34 | 5 days | |
| JBO-506144 | M27 | 0.75 | £197.38 | 5 days | |
| JBO-506143 | M26 | 0.75 | £196.27 | 5 days | |
| JBO-500536 | M25 | 0.75 | £178.73 | 5 days | |
| JBO-503723 | M24 | 0.75 | £164.47 | 5 days | |
| JBO-503101 | M23 | 0.75 | £180.92 | 5 days | |
| JBO-506142 | M22 | 0.75 | £160.09 | 5 days | |
| JBO-503962 | M21 | 0.75 | £169.96 | 5 days | |
| JBO-502788 | M20 | 0.75 | £133.78 | 5 days | |
| JBO-505460 | M19 | 0.75 | £160.09 | 5 days | |
| JBO-503242 | M18 | 0.75 | £126.10 | 5 days | |
| JBO-506089 | M17 | 0.75 | £148.02 | 5 days | |
| JBO-500342 | M16 | 0.75 | £117.33 | 5 days | |
| JBO-505856 | M15 | 0.75 | £127.21 | 5 days | |
| JBO-500291 | M14 | 0.75 | £101.54 | 5 days | |
| JBO-506088 | M13 | 0.75 | £117.33 | 5 days | |
| JBO-500238 | M12 | 0.75 | £92.01 | 5 days | |
| JBO-500210 | M11 | 0.75 | £103.29 | 5 days | |
| JBO-500178 | M10 | 0.75 | £83.46 | 5 days | |
| JBO-502782 | M9 | 0.75 | £90.25 | 5 days | |
| JBO-501002 | M8 | 0.75 | £75.00 | 5 days | |
| JBO-500961 | M7 | 0.75 | £88.06 | 5 days | |
| JBO-500920 | M6 | 0.75 | £73.68 | 5 days | |
| JBO-503265 | M5 | 0.75 | £95.08 | 5 days | |
| JBO-503946 | M18 | 0.5 | £199.57 | 5 days | |
| JBO-506085 | M17 | 0.5 | £189.69 | 5 days | |
| JBO-503945 | M16 | 0.5 | £164.47 | 5 days | |
| JBO-506084 | M15 | 0.5 | £167.77 | 5 days | |
| JBO-506083 | M14 | 0.5 | £151.32 | 5 days | |
| JBO-506082 | M13 | 0.5 | £153.51 | 5 days | |
| JBO-503944 | M12 | 0.5 | £139.25 | 5 days | |
| JBO-506081 | M11 | 0.5 | £142.55 | 5 days | |
| JBO-500173 | M10 | 0.5 | £121.72 | 5 days | |
| JBO-503943 | M9 | 0.5 | £114.03 | 5 days | |
| JBO-500997 | M8 | 0.5 | £110.75 | 5 days | |
| JBO-503942 | M7 | 0.5 | £104.82 | 5 days | |
| JBO-500914 | M6 | 0.5 | £105.48 | 5 days | |
| JBO-500841 | M5 | 0.5 | £101.44 | 5 days | |
| JBO-503941 | M4.5 | 0.5 | £114.03 | 5 days | |
| JBO-500750 | M4 | 0.5 | £101.44 | 5 days | |
| JBO-503684 | M4 | 0.35 | £101.54 | 5 days | |
| JBO-503656 | M3.5 | 0.35 | £104.95 | 5 days | |
| JBO-500610 | M3 | 0.35 | £112.95 | 5 days | |
| JBO-506282 | M70 | 2 | £339.93 | 5 days | |
| JBO-506281 | M68 | 2 | £339.93 | 5 days | |
| JBO-506280 | M65 | 2 | £315.79 | 5 days | |
| JBO-500938 | M64 | 2 | £321.28 | 5 days | |
| JBO-506279 | M62 | 2 | £301.53 | 5 days | |
| JBO-505804 | M60 | 2 | £285.10 | 5 days | |
| JBO-506278 | M58 | 2 | £301.53 | 5 days | |
| JBO-500884 | M56 | 2 | £280.72 | 5 days | |
| JBO-500876 | M55 | 2 | £268.65 | 5 days | |
| JBO-500866 | M52 | 2 | £252.20 | 5 days | |
| JBO-506277 | M50 | 2 | £260.97 | 5 days | |
| JBO-504016 | M48 | 2 | £239.05 | 5 days | |
| JBO-505934 | M45 | 2 | £228.09 | 5 days | |
| JBO-500783 | M42 | 2 | £214.91 | 5 days | |
| JBO-506276 | M40 | 2 | £222.60 | 5 days | |
| JBO-504015 | M39 | 2 | £202.87 | 5 days | |
| JBO-506275 | M38 | 2 | £209.44 | 5 days | |
| JBO-504014 | M36 | 2 | £184.22 | 5 days | |
| JBO-500672 | M33 | 2 | £173.24 | 5 days | |
| JBO-506274 | M32 | 2 | £178.73 | 5 days | |
| JBO-500642 | M30 | 2 | £159.00 | 5 days | |
| JBO-506273 | M28 | 2 | £164.47 | 5 days | |
| JBO-500576 | M27 | 2 | £150.21 | 5 days | |
| JBO-506272 | M26 | 2 | £148.02 | 5 days | |
| JBO-506271 | M25 | 2 | £143.64 | 5 days | |
| JBO-502733 | M24 | 2 | £134.87 | 5 days | |
| JBO-500500 | M22 | 2 | £129.40 | 5 days | |
| JBO-504013 | M20 | 2 | £128.29 | 5 days | |
| JBO-504012 | M18 | 2 | £129.40 | 5 days | |
| JBO-506474 | M85 | 1.5 | £419.97 | 5 days | |
| JBO-506472 | M82 | 1.5 | £411.20 | 5 days | |
| JBO-506471 | M80 | 1.5 | £402.41 | 5 days | |
| JBO-506469 | M78 | 1.5 | £389.26 | 5 days | |
| JBO-505522 | M75 | 1.5 | £369.53 | 5 days | |
| JBO-503153 | M72 | 1.5 | £349.78 | 5 days | |
| JBO-505518 | M70 | 1.5 | £328.97 | 5 days | |
| JBO-506467 | M68 | 1.5 | £324.56 | 5 days | |
| JBO-504011 | M65 | 1.5 | £304.83 | 5 days | |
| JBO-506464 | M64 | 1.5 | £308.13 | 5 days | |
| JBO-504052 | M62 | 1.5 | £288.38 | 5 days | |
| JBO-504051 | M60 | 1.5 | £279.61 | 5 days | |
| JBO-505506 | M58 | 1.5 | £268.65 | 5 days | |
| JBO-500881 | M56 | 1.5 | £264.27 | 5 days | |
| JBO-506459 | M55 | 1.5 | £257.69 | 5 days | |
| JBO-505810 | M52 | 1.5 | £241.24 | 5 days | |
| JBO-503447 | M50 | 1.5 | £232.47 | 5 days | |
| JBO-500811 | M48 | 1.5 | £228.09 | 5 days | |
| JBO-505492 | M45 | 1.5 | £211.63 | 5 days | |
| JBO-503485 | M42 | 1.5 | £206.14 | 5 days | |
| JBO-503159 | M40 | 1.5 | £196.27 | 5 days | |
| JBO-505482 | M39 | 1.5 | £209.44 | 5 days | |
| JBO-500717 | M38 | 1.5 | £183.12 | 5 days | |
| JBO-505883 | M36 | 1.5 | £188.61 | 5 days | |
| JBO-500689 | M35 | 1.5 | £172.16 | 5 days | |
| JBO-506451 | M34 | 1.5 | £179.84 | 5 days |
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