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JBO Thread Plug Gauge (GO) - Metric Fine - Left Hand - 6H - M50 x 1
SKU:JBO-516866
The JBO Thread Plug Gauge (GO) - Metric Fine - Left Hand - 6H - M50 x 1 is a precision inspection tool designed to verify internal threads in metal components. This GO gauge helps machinists, ins...
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Specifications at a glance
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| Thread Form | Metric |
| Size | M50 |
| Pitch | 1 |
| Gauge Type | Plug Gauge (GO) |
£168.86
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 Plug Gauge (GO) - Metric Fine - Left Hand - 6H - M50 x 1 is a precision inspection tool designed to verify internal threads in metal components. This GO gauge helps machinists, inspectors, and quality teams quickly determine whether threaded holes meet exact metric specifications, ensuring reliable assembly and reducing fitting surprises.
Crafted from hardened steel for lasting durability, the gauge features a knurled, easy-to-grip body and a left-hand orientation that simplifies checks on LH threads, supporting accurate and repeatable measurements in busy shops.
- Accurate metric fine pitch (M50 x 1 LH GO): Enables fast, pass/fail verification of hole size and thread pitch, speeding inspections and reducing rework.
- Hardened steel construction: Delivers long tool life and consistent performance in demanding environments, resisting wear over thousands of uses.
- User-friendly, left-hand design: The knurled body provides secure grip and intuitive orientation for quick checks, helping maintain workflow continuity and measurement reliability.
Using the JBO Thread Plug Gauge (GO) ensures your threaded holes conform to the M50 x 1 LH 6H standard, improving first-pass assembly, reducing downtime, and delivering consistent results across parts and batches. It combines durability with practical usability, giving teams a dependable tool for precise quality control and trustworthy manufacturing outcomes.
Part Numbers
- Protool Part Number
- JBO-516866
- 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 Plug Gauges (GO) - Metric Fine
View full collection →You are viewing JBO-516866. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-511113 | M42 | 1 | £106.37 | 5 days | |
| JBO-511123 | M45 | 1 | £114.03 | 5 days | |
| JBO-511138 | M48 | 1 | £121.72 | 5 days | |
| JBO-511165 | M50 | 1 | £127.21 | 5 days | |
| JBO-511175 | M52 | 1 | £131.59 | 5 days | |
| JBO-513565 | M55 | 1 | £143.64 | 5 days | |
| JBO-511188 | M56 | 1 | £145.83 | 5 days | |
| JBO-511194 | M58 | 1 | £153.51 | 5 days | |
| JBO-511212 | M60 | 1 | £160.09 | 5 days | |
| JBO-513478 | M62 | 1 | £184.22 | 5 days | |
| JBO-513730 | M64 | 1 | £187.50 | 5 days | |
| JBO-514015 | M65 | 1 | £194.08 | 5 days | |
| JBO-511228 | M68 | 1 | £202.87 | 5 days | |
| JBO-511239 | M70 | 1 | £208.34 | 5 days | |
| JBO-520030 | M72 | 1 | £213.83 | 5 days | |
| JBO-520031 | M75 | 1 | £230.28 | 5 days | |
| JBO-511249 | M76 | 1 | £231.36 | 5 days | |
| JBO-520032 | M78 | 1 | £244.52 | 5 days | |
| JBO-511273 | M80 | 1 | £242.33 | 5 days | |
| JBO-511114 | M42 | 1.5 | £92.54 | 5 days | |
| JBO-511124 | M45 | 1.5 | £98.14 | 5 days | |
| JBO-511140 | M48 | 1.5 | £104.06 | 5 days | |
| JBO-511166 | M50 | 1.5 | £107.03 | 5 days | |
| JBO-511176 | M52 | 1.5 | £111.84 | 5 days | |
| JBO-511184 | M55 | 1.5 | £118.42 | 5 days | |
| JBO-511189 | M56 | 1.5 | £120.61 | 5 days | |
| JBO-511195 | M58 | 1.5 | £124.99 | 5 days | |
| JBO-511213 | M60 | 1.5 | £129.40 | 5 days | |
| JBO-511216 | M62 | 1.5 | £132.68 | 5 days | |
| JBO-511219 | M64 | 1.5 | £139.25 | 5 days | |
| JBO-511223 | M65 | 1.5 | £144.74 | 5 days | |
| JBO-511229 | M68 | 1.5 | £149.13 | 5 days | |
| JBO-511240 | M70 | 1.5 | £152.43 | 5 days | |
| JBO-511243 | M72 | 1.5 | £162.28 | 5 days | |
| JBO-511247 | M75 | 1.5 | £168.86 | 5 days | |
| JBO-511250 | M76 | 1.5 | £210.53 | 5 days | |
| JBO-511252 | M78 | 1.5 | £174.35 | 5 days | |
| JBO-511274 | M80 | 1.5 | £179.84 | 5 days | |
| JBO-511278 | M82 | 1.5 | £184.22 | 5 days | |
| JBO-511280 | M85 | 1.5 | £191.89 | 5 days | |
| JBO-516722 | M88 | 1.5 | £198.46 | 5 days | |
| JBO-511296 | M90 | 1.5 | £201.76 | 5 days | |
| JBO-513057 | M92 | 1.5 | £208.34 | 5 days | |
| JBO-511302 | M95 | 1.5 | £211.63 | 5 days | |
| JBO-520042 | M98 | 1.5 | £275.23 | 5 days | |
| JBO-510837 | M100 | 1.5 | £224.79 | 5 days | |
| JBO-510840 | M102 | 1.5 | £277.42 | 5 days | |
| JBO-516858 | M105 | 1.5 | £235.75 | 5 days | |
| JBO-520044 | M108 | 1.5 | £293.87 | 5 days | |
| JBO-510850 | M110 | 1.5 | £246.71 | 5 days | |
| JBO-510853 | M112 | 1.5 | £298.26 | 5 days | |
| JBO-520045 | M115 | 1.5 | £307.02 | 5 days | |
| JBO-520046 | M118 | 1.5 | £314.71 | 5 days | |
| JBO-520047 | M120 | 1.5 | £319.09 | 5 days | |
| JBO-516664 | M122 | 1.5 | £345.40 | 5 days | |
| JBO-520048 | M125 | 1.5 | £335.54 | 5 days | |
| JBO-510875 | M128 | 1.5 | £360.76 | 5 days | |
| JBO-517861 | M130 | 1.5 | £348.70 | 5 days | |
| JBO-518665 | M132 | 1.5 | £354.19 | 5 days | |
| JBO-520049 | M135 | 1.5 | £370.62 | 5 days | |
| JBO-520050 | M138 | 1.5 | £381.60 | 5 days | |
| JBO-520051 | M140 | 1.5 | £384.88 | 5 days | |
| JBO-518196 | M142 | 1.5 | £382.68 | 5 days | |
| JBO-520052 | M145 | 1.5 | £400.22 | 5 days | |
| JBO-520053 | M148 | 1.5 | £406.82 | 5 days | |
| JBO-518077 | M150 | 1.5 | £414.48 | 5 days | |
| JBO-511116 | M42 | 2 | £95.08 | 5 days | |
| JBO-511128 | M45 | 2 | £101.00 | 5 days | |
| JBO-511144 | M48 | 2 | £106.91 | 5 days | |
| JBO-511169 | M50 | 2 | £110.75 | 5 days | |
| JBO-511178 | M52 | 2 | £115.14 | 5 days | |
| JBO-511186 | M55 | 2 | £121.72 | 5 days | |
| JBO-511191 | M56 | 2 | £123.91 | 5 days | |
| JBO-511196 | M58 | 2 | £128.29 | 5 days | |
| JBO-511214 | M60 | 2 | £132.68 | 5 days | |
| JBO-511217 | M62 | 2 | £137.06 | 5 days | |
| JBO-511220 | M64 | 2 | £143.64 | 5 days | |
| JBO-511224 | M65 | 2 | £149.13 | 5 days | |
| JBO-511230 | M68 | 2 | £152.43 | 5 days | |
| JBO-511241 | M70 | 2 | £157.90 | In Stock | |
| JBO-511244 | M72 | 2 | £162.28 | 5 days | |
| JBO-511248 | M75 | 2 | £168.86 | 5 days | |
| JBO-511251 | M76 | 2 | £179.84 | 5 days | |
| JBO-511253 | M78 | 2 | £183.12 | 5 days | |
| JBO-511275 | M80 | 2 | £179.84 | 5 days | |
| JBO-511279 | M82 | 2 | £194.08 | 5 days | |
| JBO-511281 | M85 | 2 | £194.08 | 5 days | |
| JBO-511284 | M88 | 2 | £211.63 | 5 days | |
| JBO-511297 | M90 | 2 | £201.76 | 5 days | |
| JBO-511301 | M92 | 2 | £207.25 | 5 days | |
| JBO-511303 | M95 | 2 | £211.63 | 5 days | |
| JBO-511304 | M98 | 2 | £219.30 | 5 days | |
| JBO-510838 | M100 | 2 | £224.79 | 5 days | |
| JBO-526463 | M102 | 2 | £280.72 | 5 days | |
| JBO-510842 | M105 | 2 | £235.75 | 5 days | |
| JBO-520069 | M108 | 2 | £296.06 | 5 days | |
| JBO-510851 | M110 | 2 | £246.71 | 5 days | |
| JBO-516663 | M112 | 2 | £303.75 | 5 days | |
| JBO-510854 | M115 | 2 | £307.02 | 5 days | |
| JBO-518905 | M118 | 2 | £321.28 | 5 days | |
| JBO-510872 | M120 | 2 | £319.09 | 5 days | |
| JBO-510873 | M122 | 2 | £345.40 | 5 days | |
| JBO-515033 | M125 | 2 | £335.54 | 5 days | |
| JBO-514954 | M128 | 2 | £345.40 | 5 days | |
| JBO-514063 | M130 | 2 | £348.70 | 5 days | |
| JBO-510880 | M132 | 2 | £354.19 | 5 days | |
| JBO-510881 | M135 | 2 | £361.85 | 5 days | |
| JBO-520071 | M138 | 2 | £373.92 | 5 days | |
| JBO-510897 | M140 | 2 | £377.19 | 5 days | |
| JBO-516669 | M142 | 2 | £382.68 | 5 days | |
| JBO-518907 | M145 | 2 | £391.45 | 5 days | |
| JBO-516670 | M148 | 2 | £400.22 | 5 days | |
| JBO-510904 | M150 | 2 | £405.71 | 5 days | |
| JBO-511118 | M42 | 3 | £111.84 | 5 days | |
| JBO-511130 | M45 | 3 | £117.33 | 5 days | |
| JBO-511148 | M48 | 3 | £123.91 | 5 days | |
| JBO-513534 | M50 | 3 | £166.67 | 5 days | |
| JBO-511179 | M52 | 3 | £132.68 | 5 days | |
| JBO-516710 | M55 | 3 | £164.47 | 5 days | |
| JBO-511192 | M56 | 3 | £163.39 | 5 days | |
| JBO-511197 | M58 | 3 | £172.16 | 5 days | |
| JBO-513225 | M60 | 3 | £176.54 | 5 days | |
| JBO-513529 | M62 | 3 | £184.22 | 5 days | |
| JBO-513530 | M64 | 3 | £184.22 | 5 days | |
| JBO-511225 | M65 | 3 | £186.41 | 5 days | |
| JBO-511231 | M68 | 3 | £201.76 | 5 days | |
| JBO-520084 | M70 | 3 | £203.95 | 5 days | |
| JBO-513125 | M72 | 3 | £209.44 | 5 days | |
| JBO-516235 | M75 | 3 | £220.40 | 5 days | |
| JBO-520085 | M76 | 3 | £222.60 | 5 days | |
| JBO-516720 | M80 | 3 | £232.47 | 5 days | |
| JBO-511282 | M85 | 3 | £246.71 | 5 days | |
| JBO-511298 | M90 | 3 | £264.27 | 5 days | |
| JBO-516856 | M95 | 3 | £278.53 | 5 days | |
| JBO-510839 | M100 | 3 | £289.49 | 5 days | |
| JBO-517703 | M105 | 3 | £307.02 | 5 days | |
| JBO-510852 | M110 | 3 | £319.09 | 5 days | |
| JBO-517089 | M115 | 3 | £336.63 | 5 days | |
| JBO-516880 | M120 | 3 | £349.78 | 5 days | |
| JBO-510874 | M125 | 3 | £362.95 | 5 days | |
| JBO-513756 | M130 | 3 | £379.41 | 5 days | |
| JBO-516891 | M135 | 3 | £395.84 | 5 days | |
| JBO-510898 | M140 | 3 | £409.01 | 5 days | |
| JBO-512978 | M145 | 3 | £427.63 | 5 days | |
| JBO-520086 | M150 | 3 | £443.00 | 5 days | |
| JBO-513507 | M52 | 4 | £155.70 | 5 days | |
| JBO-516924 | M55 | 4 | £177.65 | 5 days | |
| JBO-511193 | M56 | 4 | £163.39 | 5 days | |
| JBO-520087 | M58 | 4 | £178.73 | 5 days | |
| JBO-511215 | M60 | 4 | £176.54 | 5 days | |
| JBO-513532 | M62 | 4 | £180.92 | 5 days | |
| JBO-511222 | M64 | 4 | £184.22 | 5 days | |
| JBO-520088 | M65 | 4 | £186.41 | 5 days | |
| JBO-518916 | M68 | 4 | £198.46 | 5 days | |
| JBO-514296 | M70 | 4 | £203.95 | 5 days | |
| JBO-511245 | M72 | 4 | £209.44 | 5 days | |
| JBO-520090 | M75 | 4 | £220.40 | 5 days | |
| JBO-517001 | M76 | 4 | £222.60 | 5 days | |
| JBO-511277 | M80 | 4 | £232.47 | 5 days | |
| JBO-511283 | M85 | 4 | £246.71 | 5 days | |
| JBO-516724 | M90 | 4 | £264.27 | 5 days | |
| JBO-517005 | M95 | 4 | £278.53 | 5 days | |
| JBO-514222 | M100 | 4 | £289.49 | 5 days | |
| JBO-514223 | M105 | 4 | £307.02 | 5 days | |
| JBO-513658 | M110 | 4 | £320.18 | 5 days | |
| JBO-520091 | M115 | 4 | £336.63 | 5 days | |
| JBO-517002 | M120 | 4 | £349.78 | 5 days | |
| JBO-516665 | M125 | 4 | £362.95 | 5 days | |
| JBO-520092 | M130 | 4 | £379.41 | 5 days | |
| JBO-520093 | M135 | 4 | £395.84 | 5 days | |
| JBO-520094 | M140 | 4 | £409.01 | 5 days | |
| JBO-520095 | M145 | 4 | £427.63 | 5 days | |
| JBO-517006 | M150 | 4 | £443.00 | 5 days | |
| JBO-520096 | M70 | 6 | £223.68 | 5 days | |
| JBO-511242 | M72 | 6 | £228.09 | 5 days | |
| JBO-518716 | M76 | 6 | £233.56 | 5 days | |
| JBO-514186 | M80 | 6 | £246.71 | 5 days | |
| JBO-515444 | M85 | 6 | £266.46 | 5 days | |
| JBO-511299 | M90 | 6 | £289.49 | 5 days | |
| JBO-520100 | M95 | 6 | £300.45 | 5 days | |
| JBO-520101 | M100 | 6 | £315.79 | 5 days | |
| JBO-511115 | M42 | 1.5 | £112.95 | 5 days | |
| JBO-511126 | M45 | 1.5 | £117.33 | 5 days | |
| JBO-511142 | M48 | 1.5 | £127.21 | 5 days | |
| JBO-511167 | M50 | 1.5 | £130.48 | 5 days | |
| JBO-511177 | M52 | 1.5 | £134.87 | 5 days | |
| JBO-518531 | M55 | 1.5 | £150.21 | 5 days | |
| JBO-518947 | M56 | 1.5 | £152.43 | 5 days | |
| JBO-518532 | M58 | 1.5 | £157.90 | 5 days | |
| JBO-514812 | M60 | 1.5 | £160.09 | 5 days | |
| JBO-511117 | M42 | 2 | £116.23 | 5 days | |
| JBO-516705 | M45 | 2 | £123.91 | 5 days | |
| JBO-511146 | M48 | 2 | £133.78 | 5 days | |
| JBO-526427 | M50 | 2 | £139.25 | 5 days | |
| JBO-514336 | M52 | 2 | £144.74 | 5 days | |
| JBO-513205 | M55 | 2 | £161.19 | 5 days | |
| JBO-526428 | M56 | 2 | £157.90 | 5 days | |
| JBO-526429 | M58 | 2 | £159.00 | 5 days | |
| JBO-513539 | M60 | 2 | £164.47 | 5 days | |
| JBO-526523 | M62 | 2 | £182.03 | 5 days | |
| JBO-523683 | M64 | 2 | £187.50 | 5 days | |
| JBO-526515 | M65 | 2 | £185.31 | 5 days | |
| JBO-526517 | M68 | 2 | £191.89 | 5 days | |
| JBO-516911 | M70 | 2 | £198.46 | 5 days | |
| JBO-518205 | M72 | 2 | £203.95 | 5 days | |
| JBO-526519 | M75 | 2 | £211.63 | 5 days | |
| JBO-518362 | M76 | 2 | £221.49 | 5 days | |
| JBO-517903 | M78 | 2 | £231.36 | 5 days | |
| JBO-511276 | M80 | 2 | £226.98 | 5 days | |
| JBO-526520 | M82 | 2 | £243.43 | 5 days | |
| JBO-513955 | M85 | 2 | £235.75 | 5 days | |
| JBO-518813 | M42 | 1.5 | £121.72 | 5 days | |
| JBO-511125 | M45 | 1.5 | £126.10 | 5 days | |
| JBO-511141 | M48 | 1.5 | £144.74 | 5 days | |
| JBO-523377 | M50 | 1.5 | £137.06 | 5 days | |
| JBO-514157 | M52 | 1.5 | £143.64 | 5 days | |
| JBO-526426 | M55 | 1.5 | £157.90 | 5 days | |
| JBO-523162 | M56 | 1.5 | £167.77 | 5 days | |
| JBO-515462 | M58 | 1.5 | £166.67 | 5 days | |
| JBO-514064 | M60 | 1.5 | £172.16 | 5 days | |
| JBO-515066 | M42 | 2 | £126.10 | 5 days | |
| JBO-515067 | M45 | 2 | £132.68 | 5 days | |
| JBO-511145 | M48 | 2 | £142.55 | 5 days | |
| JBO-526430 | M50 | 2 | £153.51 | 5 days | |
| JBO-514105 | M52 | 2 | £152.43 | 5 days | |
| JBO-517063 | M55 | 2 | £169.96 | 5 days | |
| JBO-526431 | M56 | 2 | £172.16 | 5 days | |
| JBO-526432 | M58 | 2 | £178.73 | 5 days | |
| JBO-526433 | M60 | 2 | £177.65 | 5 days | |
| JBO-513222 | M42 | 1 | £141.45 | 5 days | |
| JBO-513673 | M45 | 1 | £151.32 | 5 days | |
| JBO-514650 | M48 | 1 | £162.28 | 5 days | |
| JBO-516866 Viewing | M50 | 1 | £168.86 | 5 days | |
| JBO-517229 | M52 | 1 | £176.54 | 5 days | |
| JBO-517231 | M55 | 1 | £185.31 | 5 days | |
| JBO-517233 | M56 | 1 | £182.03 | 5 days | |
| JBO-517235 | M58 | 1 | £202.87 | 5 days | |
| JBO-517239 | M60 | 1 | £210.53 | 5 days | |
| JBO-513096 | M42 | 1.5 | £116.23 | 5 days | |
| JBO-511127 | M45 | 1.5 | £123.91 | 5 days | |
| JBO-511143 | M48 | 1.5 | £132.68 | 5 days | |
| JBO-511168 | M50 | 1.5 | £133.78 | 5 days | |
| JBO-513626 | M52 | 1.5 | £141.45 | 5 days | |
| JBO-511185 | M55 | 1.5 | £152.43 | 5 days | |
| JBO-511190 | M56 | 1.5 | £155.70 | 5 days | |
| JBO-513185 | M58 | 1.5 | £166.67 | 5 days | |
| JBO-513228 | M60 | 1.5 | £172.16 | 5 days | |
| JBO-517276 | M62 | 1.5 | £177.65 | 5 days | |
| JBO-517059 | M64 | 1.5 | £183.12 | 5 days | |
| JBO-514678 | M65 | 1.5 | £188.61 | 5 days |
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