Starrett 71986 Micrometer Rod 4 to 5 Inches Depth Gage

Product Description

The STARRETT 71986 is a replacement micrometer rod designed for use with 443 and 445 Series micrometer depth gages. It extends the measuring range of compatible depth gages to cover depths from 4 to 5 inches. The rod features a 5/32-inch diameter (3.20 mm) and is engineered to the dimensional tolerances required for accurate micrometer-grade depth measurement. Metrology technicians, machinists, and quality control professionals install this rod when extending or restoring the measurement range of a depth gage set. It ships individually and is sold as a single unit.

This rod is suited for dimensional inspection tasks in machine shops, toolrooms, and manufacturing quality control environments. It is used wherever a 443 or 445 Series Starrett micrometer depth gage requires a 4-to-5-inch measurement range extension. Applications include measuring slot depths, counterbore depths, and step heights on machined components.

Key Features

• Measurement range: 4 to 5 inches when used with a compatible depth gage
• Rod diameter: 5/32 inch (3.20 mm) for proper fit in 443 and 445 Series gage bodies
• Designed as a direct OEM accessory replacement rod
• Sold as a single rod (package quantity: 1)
• Lightweight construction at 0.0375 pounds for easy handling

Compatibility

Compatible with the Starrett 443 and 445 Series micrometer depth gages, as specified in the product documentation.

Installation Notes

Installation should be performed by a qualified metrologist or machinist familiar with micrometer depth gage assembly. Before swapping rods, ensure the gage is clean and free of debris at the spindle and rod-seating surfaces. Handle the rod only at non-measuring surfaces to avoid introducing measurement error from contamination or thermal expansion. After installation, verify zero calibration against a known reference standard before returning the gage to service.