Description:
The INSIZE 3203 Series Inch Outside Micrometer is a precision mechanical measuring instrument designed for accurate external dimensional measurements in engineering, machining, manufacturing and industrial quality control applications.
Available in six individual measuring ranges from 0–1″ to 5–6″, this listing includes models 3203-1A, 3203-2A, 3203-3A, 3203-4A, 3203-5A and 3203-6A.
Each micrometer features a 0.0001″ graduation and a ratchet stop mechanism to help maintain consistent measuring pressure for dependable dimensional readings.
The series provides model-dependent accuracy of ±0.0001″ or ±0.00015″, making it suitable for precision measurement of shafts, rods, machined components and other external dimensions.
Equipped with carbide measuring faces, the micrometers offer improved wear resistance during repeated industrial measurement tasks.
The traditional mechanical sleeve and thimble design allows accurate inch-based measurements without batteries, charging or electronic components.
The 3203-2A through 3203-6A models are supplied with setting standards for measurement verification and adjustment, while the 3203-1A (0–1″) model does not include a separate setting standard.
Designed for professional engineering applications, the INSIZE 3203 Inch Series is suitable for machine shops, manufacturing facilities, inspection departments and precision metalworking.
Technical Specifications:
| Specification | Details |
|---|---|
| Brand | INSIZE |
| Series | 3203 |
| Product Type | Inch Outside Micrometer |
| Available Models | 3203-1A, 3203-2A, 3203-3A, 3203-4A, 3203-5A, 3203-6A |
| Measuring Ranges | 0–1″ to 5–6″ |
| Graduation | 0.0001″ |
| Accuracy | ±0.0001″ / ±0.00015″ (Model Dependent) |
| Measurement Unit | Inches |
| Measuring Faces | Carbide |
| Measuring Mechanism | Ratchet Stop |
| Measurement Type | External Dimensional Measurement |
| Setting Standard | Included Except 3203-1A |
| Operation | Mechanical |
| Battery Required | No |
| Digital Display | No |
| Data Output | No |
Available Models & Measuring Ranges:
| Model No. | Measuring Range | Graduation | Accuracy |
|---|---|---|---|
| 3203-1A | 0–1″ | 0.0001″ | ±0.0001″ |
| 3203-2A | 1–2″ | 0.0001″ | ±0.0001″ |
| 3203-3A | 2–3″ | 0.0001″ | ±0.0001″ |
| 3203-4A | 3–4″ | 0.0001″ | ±0.00015″ |
| 3203-5A | 4–5″ | 0.0001″ | ±0.00015″ |
| 3203-6A | 5–6″ | 0.0001″ | ±0.00015″ |
Included Items:
- 1 × INSIZE 3203 Inch Outside Micrometer (Selected Model)
- 1 × Setting Standard (Except 3203-1A)
Note: Each model is sold individually. Selecting one variation does not include all six micrometers.
Recommended Applications:
- Precision engineering measurements
- CNC machining and inspection
- Mechanical workshops
- Manufacturing quality control
- Shaft diameter measurement
- Metal rod measurement
- External component inspection
- Automotive component measurement
- Tool and die manufacturing
- Machine shop inspection
- Industrial maintenance
- Precision metalworking
- Engineering laboratories
- Inch-based dimensional inspection
Key Features & Benefits:
0.0001″ Precision Graduation:
Provides 0.0001″ graduation for precise mechanical measurement readings in inches.
High Measurement Accuracy:
The 3203-1A, 3203-2A and 3203-3A offer ±0.0001″ accuracy, while the 3203-4A, 3203-5A and 3203-6A provide ±0.00015″ accuracy.
Six Measuring Ranges:
Available in six individual measuring ranges covering 0–1″ through 5–6″ for different external measurement requirements.
Ratchet Stop Mechanism:
Features a ratchet stop to help maintain consistent measuring pressure and improve measurement repeatability.
Carbide Measuring Faces:
Equipped with carbide measuring faces for improved wear resistance and long-term measurement durability.
Imperial Measurement Scale:
Provides measurements in inches, making it suitable for engineering applications requiring imperial dimensions.
Mechanical Micrometer Design:
Uses a traditional mechanical sleeve and thimble reading system for direct dimensional measurement.
Consistent Measuring Pressure:
The ratchet stop mechanism helps minimize differences in applied measuring force between operators.
Setting Standards Included:
Models 3203-2A through 3203-6A are supplied with setting standards for measurement verification and adjustment.
External Dimension Measurement:
Suitable for measuring outside diameters, material thicknesses and dimensions of precision-engineered components.
Battery-Free Operation:
Operates mechanically without batteries, charging or electronic displays.
Professional Measuring Instrument:
Suitable for machine shops, manufacturing facilities, engineering workshops and industrial quality control departments.








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