Description
Overview:
The M18x1.5 Metric Fine No-Go Ring Gauge 6g from the Insize 4129 Series is a precision inspection tool for checking external (male) metric threads on bolts, studs and shafts. Manufactured from hardened, precision-ground tool steel with a durable blackened finish, it is built to hold size and resist wear in everyday workshop use. Conforming to ISO 1502, this no-go ring verifies that an M18 x 1.5 thread does not pass below the lower limit on pitch diameter. It is suitable for quality control, maintenance and repair across construction and garden machinery, helping ensure safe, reliable threaded joints on engines, pumps, gearboxes and fixtures. Use alongside a matching GO ring gauge for a complete acceptance check when assembling or servicing equipment.
Key Features:
- M18 x 1.5 metric fine, tolerance class 6g for male threads to ISO 1502
- No-go function helps reject undersize/loose threads (should not turn on more than a limited amount under standard practice)
- Hardened, precision-ground steel body for stability and long service life
- Blackened corrosion-resistant finish suited to workshop and site conditions
- Clear size and class marking for quick identification in tool control systems
- Accurate and repeatable gauging for consistent quality checks
- Smooth outer surface for controlled handling and alignment on the workpiece
- Works as part of a GO/NO-GO system when paired with the corresponding GO ring gauge
Typical Applications:
Used for inspection of M18 x 1.5 external threads on fasteners and shafts during goods-in checks, production, assembly and maintenance. Common in repair of construction plant, compact equipment and garden machinery where reliable threaded connections are critical, such as engine ancillaries, mounting studs, couplings and accessory brackets.
Also known as:
Thread ring gauge (NO-GO), metric fine thread limiter, external thread limit gauge, NG ring, inspection ring to ISO 1502, size-control gauge for male threads, 6g no-go inspector.
Alternate Part Numbers:
841 2919, 841-2919, 8412919
Product Specifications
| L&S Part No. | 841 2919 |
|---|---|
| Unit of Sale | 1 |
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