Mitutoyo 343-350-30 Outside Micrometer 1 in Ratchet Stop

Product Description

The MITUTOYO 343-350-30 is a mechanical outside micrometer designed for precision measurement of external dimensions in machine shops, manufacturing environments, and field service applications. It covers a 0 to 1 inch measurement range with a graduation of 0.001 inches and an accuracy of 0.000250 inches, making it suitable for close-tolerance inspection work. The ratchet stop thimble ensures consistent measuring force on each reading, reducing operator-to-operator variation. The solid carbide anvil provides long service life against wear from hardened workpieces. A satin chrome finish resists corrosion and glare under shop lighting. The instrument ships with a plastic storage case.

This micrometer is used in precision machining, HVAC equipment fabrication, pipefitting inspection, and general mechanical service trades wherever external diameter or thickness must be verified to thousandths of an inch. It is well suited to residential and light commercial maintenance shops, tool rooms, and field service technicians who require a reliable hand-measuring tool without a digital readout. The fixed spindle design keeps calibration stable during repeated daily use.

Key Features

• 0 to 1 inch measurement range with 0.001 inch graduation
• Accuracy of 0.000250 inches for close-tolerance inspection
• Ratchet stop thimble delivers repeatable, consistent measuring force
• Solid carbide anvil resists wear from hardened and abrasive workpieces
• Satin chrome finish reduces glare and provides corrosion resistance
• Includes plastic storage case for protection and transport

Compatibility

Designed as a standard outside micrometer for general precision measurement applications; verify measurement range and graduation requirements match the inspection task before ordering.

Installation Notes

Outside micrometers require no installation but should be zeroed against the reference standard included with the instrument before each use session. Store the micrometer with a slight gap between the anvil and spindle to prevent thermal expansion from damaging the measuring faces. Calibration should be verified periodically by a qualified metrology technician in accordance with applicable quality system requirements. Handle measuring faces with care and avoid contact with abrasive surfaces when the instrument is not in use.