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JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M55 x 1.5
SKU:JBO-503499
The JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M55 x 1.5 is a precision tool designed to verify the external thread diameter on fasteners and machined parts. It enables quick G...
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Specifications at a glance
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| Thread Form | Metric |
| Size | M55 |
| Pitch | 1.5 |
| Gauge Type | Ring Gauge (NoGo) |
£257.69
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
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Description
The JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M55 x 1.5 is a precision tool designed to verify the external thread diameter on fasteners and machined parts. It enables quick Go/No-Go checks to ensure components conform to metric fine thread standards, helping engineers, machinists, and quality inspectors make fast, reliable pass/fail decisions.
Crafted from hardened steel, this gauge delivers outstanding wear resistance and long service life in busy workshops and quality control environments. The left-hand orientation and the 6g external thread tolerance, paired with the M55 x 1.5 size, provide reliable, repeatable measurements that support consistent thread inspections across production runs.
- Go/No-Go verification for metric fine threads: Quick, accurate checks of external thread diameter (M55 x 1.5) with 6g tolerance to confirm parts meet spec and reduce rework.
- Hardened steel for durability: Built to withstand daily use in demanding QC environments, delivering long-term accuracy and wear resistance.
- Left-hand orientation for fast inspections: Designed for LH threaded components with clear markings, enabling swift, repeatable checks and fewer setup errors.
Integrating this gauge into your workflow brings confidence to every inspection. It speeds up acceptance testing, minimizes downtime, and supports consistent, high-quality results across shifts and operators, making it a dependable addition to any precision manufacturing or quality control toolkit.
Part Numbers
- Protool Part Number
- JBO-503499
- 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-503499. 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 Viewing | 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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