Comparative external diameter
Use an indicating snap gauge to compare shaft or pin diameters with a setting master. Select the gauge range, contacts and indicating instrument together.
Precision Gages · Mahr
Snap, Thread & Tap Gauges
Compare indicating snap gauges for external dimensions with thread and tap gauging arrangements. Keep the gauge body, contacts, indicator and setting reference matched to the specific inspection task.
What can you measure?
External thread pitch diameter
Use a thread-measuring arrangement with contacts matched to the thread form and pitch. Specify the thread designation and pitch-diameter tolerance.
Tap pitch-diameter measurement
Use a tap-measuring arrangement configured for the tap geometry. Select the contacts and supports to suit the thread pitch, flute arrangement and measuring position.
Models and measurement options
| Model / option | Range or configuration | Selection notes |
|---|---|---|
| 840 F | 0–25 mm | Order 4450000; indicating snap gauge in case. |
| 840 F | 25–60 mm | Order 4450001; indicating snap gauge in case. |
| 852 | 0–45 mm | 4510000; indicating thread snap gauge. |
| 853 | 1.2–35 mm | 4511000; indicating thread snap gauge. |
| 853qk3 / 853qk5 | For the listed 1.2–35 mm arrangement | 4511024 / 4511026; crossbars for 3-part / 5-part shapes. |
Ranges refer to specific variants or sets. Confirm the exact model, configuration and accessories with your quotation. Display resolution is not a statement of measurement accuracy.
What to consider before choosing
Plain or threaded feature
Identify the characteristic to be checked before selecting a snap gauge or thread-gauging arrangement.
Thread and tap geometry
For threads provide the form, pitch and size; for taps include the flute or lobe arrangement.
Complete measuring assembly
Specify contacts, crossbar where required, indicating instrument and setting master together.
Frequently asked questions
Which category should I choose for repeated shaft-diameter checks?
Compare the 840 F indicating snap gauge with an outside micrometer for the actual production task. The India list includes 0–25 and 25–60 mm 840 F variants. Specify the nominal size, tolerance, measurement frequency and setting master.
What information is needed to select a thread or tap gauge?
Send the thread drawing with form, pitch, nominal diameter and the characteristic to be measured. For taps, include the flute or lobe arrangement. The contacts and, where applicable, crossbar must match the application.
Does the gauge body come with all the contacts and the indicator?
Do not assume that the body alone is a complete measuring setup. Ask the quotation to itemise the measuring contacts, indicating instrument, setting reference and any tap-specific accessories.
Start with your component
Discuss snap, thread & tap gauges
Part drawing, nominal size, tolerance, thread or tap details where relevant, quantity and setting method.
Model availability, accessories and lead time are confirmed with the quotation.
Range references: . Manufacturer-listed systems and options are subject to India availability and configuration confirmation.
Product photographs: Mahr. Images illustrate product families; supplied equipment and accessories depend on the selected configuration.