High-Precision Metric Thread Gauges (M1 - M300) | Tungsten Carbide & Ceramic Options
- Standard Compliance: Fully compliant with ISO 1502 and GB/T 3934-2003 standards for global interoperability.
- Premium Materials: Available in wear-resistant Tungsten Carbide, Zirconia Ceramic, and GCr15 Bearing Steel.
- Certified Accuracy: Each unit is calibrated in a $20^{\circ}\text{C}$ constant-temperature lab, supplied with a traceable inspection report.
- Versatile Range: Covering sizes from M1 to M300 with standard 6H/6g and custom tolerance classes.
What is a plain gauge?
Metric thread gauges are essential metrology tools used to verify the dimensional integrity of internal and external metric threads. At Meter Precision, our Metric Thread Plug and Ring Gauges are engineered for manufacturers who demand absolute reliability in high-volume production. By utilizing advanced materials like Zirconia Ceramic and Tungsten Carbide, we solve the common industry pain point of frequent gauge replacement due to abrasion. Our gauges ensure that every threaded component, from micro-screws in medical devices to large bolts in heavy machinery, meets the exact pitch and diameter specifications required for perfect assembly.
Extreme Wear Resistance & Stability
Precision Lapped Finishing
Full Traceability & Metrology Support
Technical Specifications
Parameter | Value |
Thread Type | Metric (M) Standard |
Material Options | Tungsten Carbide, Zirconia Ceramic (ZrO2), Bearing Steel (GCr15) |
Hardness | 58-65 HRC (Steel) / 1300-1500 HV (Carbide) |
Standards | ISO 1502, DIN 13, GB/T 3934 |
Size Range | M1.0 $\times$ 0.25 to M300 $\times$ 6.0 |
Tolerance Classes | Plug: 4H, 5H, 6H, 7H; Ring: 4g, 5g, 6g, 7g |
Calibration Temp | $20^{\circ}\text{C} \pm 0.5^{\circ}\text{C}$ |
Customization | Left-hand (LH), Multi-start, Special Pitch Diameters |
Applications
Our Metric thread gauges are widely utilized in precision-driven industries
Packaging & Shipping
To preserve the integrity of the precision surfaces, each gauge is
Coated with high-grade anti-rust oil (for steel models)
Housed in a custom-fitted, impact-resistant plastic or wooden protective case
Vacuum-sealed with desiccant to prevent oxidation during sea or air transit
Outer-packed in reinforced cartons for global export (North America, Europe, Russia).
FAQ about Plain Gauges
- 6H is the standard tolerance class for internal threads(Plug Gauge), while 6g is the standard for external threads (Ring Gauge). Using the correct class is vital for ensuring the proper “fit” of the assembly.
- Ceramic gauges do not rust, are non-magnetic, and have extreme wear resistance. They are ideal for cleanroom environments (medical/semiconductor) and help reduce the long-term cost of frequent re-calibration.
- While we provide a standard factory report, we can also coordinate with authorized labs (like CNAS or A2LA) to provide third-party certification upon request.
Yes, we can manufacture the full range of Metric Left-Hand thread gauges, clearly marked with “LH” to prevent confusion on the production line.
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