Choosing the right thread gauge manufacturer in China decides whether your incoming inspection, audits and customer acceptance go smoothly. A good supplier delivers gauges in the correct tolerance class with a traceable calibration report; a poor one can pass bad parts or reject good ones. This 2026 guide profiles 15 thread gauge manufacturers and suppliers in China, from historic state-owned toolmakers to API gauge specialists and fast-turnaround precision workshops, and shows you how to verify any of them.
Disclosure: GageTools is our own company, so it is listed first. Information on other companies comes from their own websites and public B2B directory profiles at the time of writing (October 2026). Details change, so always confirm directly with each supplier.
Quick List: 15 Thread Gauge Manufacturers in China
| # | Company | Location | Type | Best for |
|---|---|---|---|---|
| 1 | GageTools (Dongguan Zhufeng Precision Technology Co., Ltd.) | Dongguan, Guangdong | Thread gauge manufacturer | Small and mid-size orders, distributors and OEM buyers who need fast quotes and stock sizes |
| 2 | Harbin Measuring & Cutting Tool Group | Harbin, Heilongjiang | Long-established state-owned measuring and cutting tool group (part of Genertec) | Large industrial buyers and projects that prefer a state-owned brand |
| 3 | Chengdu Tool Research Institute Co., Ltd. | Chengdu, Sichuan | Research institute and manufacturer (founded 1956; subsidiary of Sinomach) | Technical projects, oil-pipe threading tools and standards-driven buyers |
| 4 | CNPC Baoji Oilfield Machinery Co., Ltd. (BOMCO) | Baoji, Shaanxi | Oilfield equipment manufacturer | Oil and gas buyers needing API thread gauges |
| 5 | Suzhou Fyou PMEC Co., Ltd. | Suzhou, Jiangsu | Gauge supplier and agent | API audits and pipe-thread inspection programs |
| 6 | Wuxi Breit Precision Measuring Tools | Wuxi, Jiangsu | Gauge supplier (business type not stated on listing) | API casing and tubing gauges |
| 7 | Dongying Kenli Jinxiu Petroleum Machinery Co., Ltd. (JX Petro) | Dongying, Shandong | Manufacturer and trading company | Oilfield thread inspection |
| 8 | Deko Corporation | Shaanxi | OEM supplier of measuring instruments | Rotary shouldered connection gauges |
| 9 | Dongguan Sinbolt Measuring Tools Co., Ltd. | Chang’an, Dongguan, Guangdong | Gauge supplier (audited on Made-in-China since 2018) | Non-standard and trapezoidal thread gauges |
| 10 | Dongguan SYS Industrial Co., Ltd. | Dongguan, Guangdong | OEM gauge supplier | Plain gauges and custom ring gauges |
| 11 | Wuhan Linsen Tool Co., Ltd. | Wuhan, Hubei | Trading company (registered 2013) | Fast stock orders |
| 12 | Xuzhou Perfect Tools | Xuzhou, Jiangsu | Trading company | Pipe thread gauges for plumbing and fittings |
| 13 | Sanmenxia Increasing Precision Industry Co., Ltd. (Yangtian) | Sanmenxia, Henan | Trading company (about 21 years on its platform) | Variable thread measurement and SPC |
| 14 | Zhuzhou Sanyinghe International Trade Co., Ltd. | Zhuzhou, Hunan | Trading / OEM supplier | Standard metric and trapezoidal gauges |
| 15 | Shenzhen Pride Instrument Inc. | Shenzhen, Guangdong | OEM/ODM supplier | Buyers combining thread gauges with welding and angle gauges |
How We Built This List
We included companies that sell thread gauges or closely related thread inspection tools to B2B buyers, and compared them on:
- Product scope: metric, UN, pipe (NPT/BSP), ACME, buttress and API threads
- Calibration documents: calibration reports, ISO/IEC 17025 or CNAS certificates, NIM traceability
- Business type: manufacturer, state-owned group, agent or trading company
- Ordering flexibility: MOQ, stock sizes and custom gauges to drawing
- Specialization: general industrial vs. oilfield API gauges
We do not rank suppliers by price, because thread gauge prices depend on size, class, material and calibration requirements.
Where Thread Gauges Are Made in China
| Region | Known for |
|---|---|
| Dongguan and Shenzhen, Guangdong | Precision and custom thread gauges, fast turnaround for exporters |
| Jiangsu (Suzhou, Wuxi, Xuzhou) | API thread gauges and pipe thread gauges |
| Shaanxi and Shandong | Oilfield API thread gauges for casing, tubing and drill pipe |
| Harbin and Chengdu | Historic state-owned measuring and cutting tool groups |
| Henan, Hubei and Hunan | Trading companies and thread measuring instruments |
The 15 Thread Gauge Manufacturers in Detail
1. GageTools (Dongguan Zhufeng Precision Technology Co., Ltd.)
- Location: Dongguan, Guangdong
- Business type: Thread gauge manufacturer
- Main products: Thread plug and ring gauges, GO/NO-GO sets, metric, UN/UNC/UNF, NPT, BSP (G/R/Rc), ACME, buttress DIN 513, gap and flush gauges, custom gauges to drawing
- Best for: Small and mid-size orders, distributors and OEM buyers who need fast quotes and stock sizes
- Experience: thread gauge manufacturing since 2004
- Quality system: ISO 9001:2015; calibration report or ISO/IEC 17025 certificate available on request (a third-party CNAS calibration certificate usually takes about 3 working days)
- MOQ: 1 piece; standard catalogue sizes held in stock ship within 72 hours
- Standards: ISO metric 6H/6g, UN 2A/2B and 3A/3B, NPT L1/L2, BSP ISO 228 and ISO 7, ACME, DIN 513 and custom threads
- Quotes: within 24 hours via the RFQ form or WhatsApp
Buyer note: This is our own company, so it is listed first. See our company facts and quality and certifications pages.
2. Harbin Measuring & Cutting Tool Group
- Location: Harbin, Heilongjiang
- Business type: Long-established state-owned measuring and cutting tool group (part of Genertec)
- Main products: Measuring instruments, gauges, gear measuring machines, cutting tools
- Best for: Large industrial buyers and projects that prefer a state-owned brand
- One of China’s best-known historic tool and gauge makers
- Broad portfolio beyond thread gauges, including gear testers and precision instruments
Buyer note: Expect formal procedures and longer quotation cycles than specialist gauge workshops.
3. Chengdu Tool Research Institute Co., Ltd.
- Location: Chengdu, Sichuan
- Business type: Research institute and manufacturer (founded 1956; subsidiary of Sinomach)
- Main products: Threading tools, cutting tools and precision measuring instruments; hosts a national quality inspection center for cutting tools, measuring tools and gauges
- Best for: Technical projects, oil-pipe threading tools and standards-driven buyers
- Founded in 1956 as the Chengdu Tool Research Institute
- Strong in thread cutting tools for API and other pipe threads
Buyer note: Ideal when you need threading tools and inspection expertise from the same source; confirm gauge availability per standard.
4. CNPC Baoji Oilfield Machinery Co., Ltd. (BOMCO)
- Location: Baoji, Shaanxi
- Business type: Oilfield equipment manufacturer
- Main products: API line pipe, casing, tubing and rotary shouldered connection thread gauges (working and master)
- Best for: Oil and gas buyers needing API thread gauges
- Described in B2B listings as a major base for oilfield thread gauges
Buyer note: Specialist in API threads, not general metric or UN gauges.
5. Suzhou Fyou PMEC Co., Ltd.
- Location: Suzhou, Jiangsu
- Business type: Gauge supplier and agent
- Main products: API Spec 5B, 7-2 and 11B thread gauges, ANSI/ASME B1.20.1, ISO 228, BS 341 and DIN 477 gauges, profile projectors
- Best for: API audits and pipe-thread inspection programs
- States it represents three API-licensed gauge manufacturers in China
- Calibration certificates stated as traceable to China’s National Institute of Metrology (NIM)
Buyer note: Ask which licensed factory makes your gauge and request the API license number.
6. Wuxi Breit Precision Measuring Tools
- Location: Wuxi, Jiangsu
- Business type: Gauge supplier (business type not stated on listing)
- Main products: API Spec 5B and 7-2 thread gauges, API 11B, 5A and 6A plain taper gauges
- Best for: API casing and tubing gauges
- B2B listings include API 5B casing ring and plug master gauges
Buyer note: Check calibration traceability and master-gauge certificates before ordering.
7. Dongying Kenli Jinxiu Petroleum Machinery Co., Ltd. (JX Petro)
- Location: Dongying, Shandong
- Business type: Manufacturer and trading company
- Main products: Thread ring and plug gauges, API 5CT thread gauges, GO/NO-GO gauges
- Best for: Oilfield thread inspection
- Around 22 years on its B2B platform (Made-in-China)
Buyer note: Mainly oilfield-focused; confirm non-API gauge capability if you need metric or UN threads.
8. Deko Corporation
- Location: Shaanxi
- Business type: OEM supplier of measuring instruments
- Main products: API Spec 7-2 master and working gauges (NC, REG, IF connections), pin and bore gauges, oil pipe thread instruments
- Best for: Rotary shouldered connection gauges
- B2B listings cover NC38, 3-1/2 REG and 6-5/8 IF connection gauges
Buyer note: Specialist range; verify calibration documents for master gauges.
9. Dongguan Sinbolt Measuring Tools Co., Ltd.
- Location: Chang’an, Dongguan, Guangdong
- Business type: Gauge supplier (audited on Made-in-China since 2018)
- Main products: Thread plug and ring gauges, Tr trapezoidal gauges, NPT and 55°/60° taper pipe gauges, pin and block gauges
- Best for: Non-standard and trapezoidal thread gauges
- Listing references GB, ISO and CNAS
Buyer note: Confirm the size range and lead time for your exact thread; listing tables cover a narrower range than headlines.
10. Dongguan SYS Industrial Co., Ltd.
- Location: Dongguan, Guangdong
- Business type: OEM gauge supplier
- Main products: Plain and thread ring gauges, master and work gauge sets, HSS ring gauges, custom gauges
- Best for: Plain gauges and custom ring gauges
- Offers master and work thread gauge sets
Buyer note: Another Dongguan option; request calibration reports with each order.
11. Wuhan Linsen Tool Co., Ltd.
- Location: Wuhan, Hubei
- Business type: Trading company (registered 2013)
- Main products: Thread ring and plug gauges, plain gauges in BSP, BSPT, metric, NPT, NPTF, UN, UNEF, UNS and ACME
- Best for: Fast stock orders
- States a large warehouse with next-day shipping for most stocked gauges
Buyer note: A trading company: ask who manufactures the gauges and how calibration is documented.
12. Xuzhou Perfect Tools
- Location: Xuzhou, Jiangsu
- Business type: Trading company
- Main products: Pipe thread plug and ring gauges (DIN 2999, NPSM, Rc/Rp, NPSI/NPSL)
- Best for: Pipe thread gauges for plumbing and fittings
- Around five years on its B2B platform
Buyer note: Useful for less common pipe thread standards; verify tolerance classes on the certificate.
13. Sanmenxia Increasing Precision Industry Co., Ltd. (Yangtian)
- Location: Sanmenxia, Henan
- Business type: Trading company (about 21 years on its platform)
- Main products: Thread pitch diameter gauges, digital thread gauges, inspection fixtures
- Best for: Variable thread measurement and SPC
- Focus on indicating and digital thread measurement rather than only GO/NO-GO
Buyer note: Good complement to attribute gauges when you need measured values.
14. Zhuzhou Sanyinghe International Trade Co., Ltd.
- Location: Zhuzhou, Hunan
- Business type: Trading / OEM supplier
- Main products: Metric, trapezoidal and gas (pipe) thread ring and plug gauges, GO/NO-GO
- Best for: Standard metric and trapezoidal gauges
- Lists metric, Tr and gas thread gauges in GO/NO-GO form
Buyer note: Confirm the manufacturing source and calibration documentation.
15. Shenzhen Pride Instrument Inc.
- Location: Shenzhen, Guangdong
- Business type: OEM/ODM supplier
- Main products: Pipe thread ring gauges, angle gauges, weld gauges
- Best for: Buyers combining thread gauges with welding and angle gauges
- Broad inspection-tool range
Buyer note: Not a thread-gauge specialist; best for mixed inspection tool orders.
Which Type of Supplier Fits Your Project?
| Your need | Best type of supplier |
|---|---|
| Metric, UN, NPT or BSP GO/NO-GO gauges, small quantities, fast | Precision gauge manufacturer with stock sizes (e.g. GageTools) |
| API 5B, 7-2 or 11B gauges for oilfield audits | API-licensed gauge maker or its authorized agent |
| Large state or infrastructure project | State-owned measuring tool group |
| Measured pitch diameter values for SPC | Supplier of indicating or digital thread gauges |
| Mixed inspection tools in one order | Trading company with a broad catalog |
Verification Checklist Before You Order
- Confirm the exact thread designation and tolerance class on your drawing (e.g. 6H vs 6g, 2B vs 3B)
- Ask whether the company manufactures or resells, and request the business license
- Request a calibration report for each gauge; ask for ISO/IEC 17025 or CNAS if your customer requires it
- For API gauges, ask for the API license number of the manufacturing factory
- Check marking: size, class, GO/NO-GO and serial number on every gauge
- Order one sample gauge and check it against known good and bad parts
- Agree on packaging and rust protection for shipping
Learn more in our guides: buying thread gauges from China, how GO/NO-GO thread gauges work and thread tolerance classes explained.
Red Flags When Buying Thread Gauges
- No calibration report, or one generic certificate for many gauges
- Gauge markings missing the tolerance class or serial number
- “API gauges” without an API license number for the manufacturing factory
- Prices far below the market for the same size and class
- Unwilling to accept a single sample order before a large purchase
Popular Thread Gauge Types to Source
- Thread plug gauges for internal threads
- Thread ring gauges for external threads
- Metric thread gauges (6H/6g and other classes)
- GO/NO-GO thread gauge sets
- BSP thread gauges (G, R, Rc, Rp)
- Gap and flush gauges and custom gauges to drawing
Frequently Asked Questions
Who are the main thread gauge manufacturers in China?
China’s thread gauge industry ranges from historic state-owned groups such as Harbin Measuring & Cutting Tool Group and the Chengdu Tool Research Institute, to API gauge specialists in Shaanxi, Shandong and Jiangsu, and precision gauge makers in Dongguan such as GageTools. This guide profiles 15 of them.
Where are thread gauges made in China?
Key regions are Dongguan and Shenzhen in Guangdong for precision and custom gauges, Jiangsu (Suzhou, Wuxi, Xuzhou) for API and pipe thread gauges, Shaanxi and Shandong for oilfield API gauges, and historic tool centers in Harbin and Chengdu.
How do I verify a Chinese thread gauge supplier?
Ask for the business license, a calibration report or ISO/IEC 17025 certificate for each gauge, a sample gauge to check against your parts, and for API gauges, the API license number of the manufacturing factory.
Can I buy a single thread gauge from China?
Yes, some suppliers accept single pieces. GageTools has a MOQ of 1 piece, and standard catalogue sizes held in stock ship within 72 hours.
Are thread gauges from China accepted for quality audits?
They can be, if each gauge comes with a traceable calibration report and the tolerance class matches your drawing. Ask for CNAS or ISO/IEC 17025 calibration where your customer requires it.
What information should I send for a thread gauge quote?
Thread designation and tolerance class (for example M20x2.5-6H or 1/2-14 NPT L1), plug or ring, GO, NO-GO or both, quantity, and calibration certificate requirements. A drawing helps for custom threads.
Need thread gauges with a calibration report? Send your thread size, class and quantity or message us on WhatsApp +86 173 1689 5054. We reply with a quotation within 24 hours.