25mm Nut Gauge Micrometer With Ratchet Stop, 0.01mm Resolution, Supplied In Case - Metav IndustryLine

Combining a precise 0–25 mm measuring range with a 0.01 mm reading and a friction ratchet for constant measuring pressure, this groove micrometer delivers repeatable slot and keyway checks in fine mechanical work. Order the M307.021 directly via Metav Werkzeuge or ask our consultants if needed.

M307.021 Groove micrometer — analogue instrument, 0–25 mm, friction ratchet (Metav IndustryLine)

The M307.021 is an analogue groove micrometer designed for precise slot and groove measurement in fine mechanical and toolroom applications.

• Analogue micrometer with 0.01 mm reading
• High accuracy ±0.005 mm
• Friction ratchet for consistent pressure
• Supplied in protective case

Consistent, repeatable groove checks with controlled measuring force

The instrument combines a 0–25 mm range with a 0.01 mm scale and an industrial-grade accuracy of ±0.005 mm, delivering the precision expected in micro‑mechanical inspection. The integrated friction ratchet ensures a reproducible contact force on each measurement, reducing operator influence and improving comparability across repeated checks. A non‑rotating spindle protects the measured surface from damage and avoids reading errors caused by spindle rotation. These features make the tool a reliable choice for tasks where repeatability is critical, such as verifying slot widths, keyways and narrow grooves.

Compact geometry tailored for fine workshop and toolroom tasks

With compact measuring faces sized 0.75 x 6.5 mm, the micrometer is optimised for confined slots and narrow features frequently encountered in jigs, fixtures and small assemblies. The narrow face geometry enables access to tight grooves while maintaining sufficient contact area for stable readings. As an analogue, mechanical instrument it offers direct visual feedback and simple serviceability in workshop environments. The short measuring span places the device in the micro class (measuring range up to 100 mm), which is ideal when maximum stiffness, low deflection and fine tactile control are required in delicate inspection work.

Ready for workshop use and traceable delivery

The tool is supplied in a protective plastic or wooden case suitable for transport and safe storage of precision instruments. Built for routine use, the mechanical design avoids complex electronics while providing durable performance and straightforward maintenance. The metrology and logistical backing from the manufacturer guarantees consistent availability and a quality filter for the European market, reflecting Metav’s approach to democratising precision for workshops and specialist suppliers. Calibration status and certificates are provided where stated in the product labelling and ordering information.

Contact Metav Werkzeuge for detailed specifications or to arrange supply of the Metav IndustryLine M307.021 groove micrometer — call +49 2822 7131930 or e‑mail info@metav-werkzeuge.com

Technical data

• Article number: M307.021
• GTIN: 4054469117263
• Category: Micrometers (Messschrauben)
• eClass: 21170328
• ETIM: EC003590
• Tariff number: 90173000
• Manufacturer: Metav IndustryLine

Facts

• Measuring range: 0–25 mm
• Resolution (reading): 0.01 mm
• Accuracy: ±0.005 mm
• Spindle pitch: 0.5 mm
• Measuring faces: 0.75 x 6.5 mm

Special features

• Analogue (mechanical) instrument
• Friction ratchet for reproducible force
• Non‑rotating spindle to protect surfaces
• Supplied in plastic or wooden protective case (for transport)
• Intended for groove and slot measurement
• Classified for micro applications (measuring range up to 100 mm)

FAQ

What measuring range does the instrument cover?
The instrument covers a measuring range of 0–25 mm and is intended for micro‑range inspection tasks.

How fine is the reading and what accuracy can be expected?
The scale reads in 0.01 mm increments and the device achieves an accuracy of ±0.005 mm under appropriate working conditions.

Is the micrometer suitable for measuring narrow grooves and keyways?
Yes — the narrow measuring faces (0.75 x 6.5 mm) and the groove‑specific design make the M307.021 suitable for slots, keyways and similar confined features.

Does the spindle rotate during measurement and why does that matter?
The micrometer uses a non‑rotating spindle, which prevents surface damage and improves measurement reliability on delicate parts.

How is the instrument delivered and protected in transit?
The instrument is supplied in a protective plastic or wooden case appropriate for the safe transport of precision tools.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com