High-Precision Plug Gauges
- Premium Materials: Available in zirconia ceramic, tungsten carbide, and GCr15 bearing steel. Ceramic and tungsten carbide offer a service life 5–10 times longer than conventional steel.
- Exceptional Precision: Fully compliant with ISO, DIN, JIS, and ANSI standards. Tolerance grades range from XX, X, Y to Z, meeting the most demanding measurement requirements.
- Certified Quality: 100% inspected in a constant temperature laboratory at 20°C. Each product is delivered with an original inspection report and supports third-party traceability.
- Fast Customization: Custom non-standard sizes and stepped designs are available within a diameter range of Φ0.1mm to Φ300mm. Standard products are in stock for fast delivery.
What is a plain plug gauge?
Precision is the foundation of trust—bringing reliable strength to every measurement.
Plain Plug Gauges, also known as Go/No-Go Gauges, are among the most essential and efficient limit gauges used for hole diameter inspection in machining.
The high-precision plug gauges produced by MISHUTE Precision are specially designed to meet stringent hole tolerance inspection requirements. Our products are manufactured in a strictly controlled 20°C constant-temperature workshop and undergo deep cryogenic treatment as well as sub-micron precision grinding. This process effectively eliminates internal material stress and ensures long-term dimensional stability.
Whether for precision assembly of aerospace components or micro-aperture inspection in medical devices, MISHUTE plug gauges deliver an exceptionally smooth measuring experience with extremely low friction and provide a truly reliable reference standard for accuracy.
Technical Specifications
Parameter | Value |
(Materials) | (Zirconia Ceramic), (Tungsten Carbide),(GCr15 Steel) |
(Type) | (GO Plug), (NO-GO Plug) |
(Size Range) | Φ0.100 mm – Φ300.000 mm |
(Tolerance Class) | Class XX, X, Y, Z |
(Hardness) | HV 1100-1300 | HRA 90-92 | HRC 58-65 |
(Surface Roughness) | Ra ≤ 0.05 μm |
(Standards) | ISO 1502, DIN 7150-2, GB/T 3934, ANSI B89.1.5 |
(Quality Assurance) | Feinmess Jena / TESA |
Applications
Packaging & Shipping
Secure Protection
Traceability Labeling
Global Express Delivery
FAQ about Plain Plug Gauges
The GO plug gauge corresponds to the maximum material condition of the workpiece hole (lower limit). During inspection, it must pass smoothly and completely through the tested hole without any excessive force or forcing.
The NO-GO plug gauge corresponds to the minimum material condition of the hole (upper limit). During inspection, it should only slightly enter the hole (typically no more than one-third of the gauge length) and must not pass through completely.
Used together, GO and NO-GO gauges allow for rapid determination of whether the hole diameter is within the allowable tolerance range.
The choice depends on your usage frequency and working environment.
- Stainless Steel (GCr15): Suitable for low-frequency measurement and cost-sensitive applications. Requires proper anti-rust maintenance.
- Ceramic: Highly recommended for high-frequency measurement. It offers extreme wear resistance (5–10 times that of steel), is rust-free, anti-static, unaffected by hand sweat, and virtually maintenance-free.
- Tungsten Carbide: The hardest option, suitable for inspecting high-hardness workpieces or abrasive materials such as cast iron. It provides excellent scratch resistance.
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