Starrett 71987 Micrometer Extension Rod 5 to 6 Inches

Product Description

The STARRETT 71987 is a micrometer extension rod designed for use with 443 and 445 Series micrometer depth gages. It extends the measurement range from 5 to 6 inches, allowing technicians and machinists to reach deeper workpiece features without switching instruments. The rod measures 5/32 inch (3.20 mm) in diameter and is machined to maintain the precision tolerances required for accurate depth measurement. This type of accessory rod is a standard replacement and range-extension component used in metrology, fabrication, and quality-control settings. Installation requires no special tools and is handled by machinists, tool and die workers, or QC technicians.

This rod is used in conjunction with STARRETT 443 and 445 Series micrometer depth gages in production, inspection, and machining environments. It is appropriate for both shop-floor measurement and bench-level inspection work where depth readings in the 5 to 6 inch range are required. The rod-style anvil design is suited for measuring slots, bores, shoulders, and recesses where a flat anvil would not seat properly.

Key Features

• Extends measurement range to 5 to 6 inches on compatible depth gages
• Rod diameter of 5/32 inch (3.20 mm) for precise fitment
• Rod-type anvil design suited for slots, bores, and recessed features
• Direct OEM-style replacement accessory for 443 and 445 Series gages
• Sold individually — package quantity of 1

Compatibility

Designed for use with STARRETT 443 and 445 Series micrometer depth gages, as specified by the manufacturer.

Installation Notes

Installation is performed by machinists or metrology technicians familiar with micrometer depth gage accessories. Thread or seat the rod into the gage spindle according to the gage manufacturer instructions, ensuring the rod is fully engaged and seated before taking measurements. Handle the rod with care to avoid nicks or burrs on the contact surfaces, which can affect measurement accuracy. Verify calibration of the assembled gage before use in critical inspection work.