Starrett 440Z-6L Micrometer Depth Gage Range Base - 0-6 2-1/2

The Starrett 440Z-6L is a precision micrometer depth gage offering a 0–6 inch measurement range and a 2-1/2 inch wide base. Engineered by L.S. Starrett — a trusted name in precision metrology — this depth gage delivers accurate, repeatable measurements for machining, toolmaking, and inspection applications.

The hardened and ground steel base provides a stable, flat reference surface that seats firmly across workpiece edges, slots, steps, and shoulders. The thimble-style micrometer mechanism delivers smooth, consistent feel with a 0.0001 inch graduation, making it well-suited for high-precision depth measurement tasks in professional shop environments.

Key Features:

• Measurement range: 0–6 inches
• Base width: 2-1/2 inches
• Graduation: 0.0001 inch
• Hardened and ground steel construction for long-term durability
• Satin chrome finish reduces glare for easy reading
• Lock nut for securing measurements
• Supplied with a fitted case for storage and protection

The 440Z-6L is ideal for measuring the depth of holes, slots, recesses, and counterbores with the accuracy demanded by precision machining and quality control professionals. Built to Starrett's exacting standards, this depth micrometer is a reliable addition to any toolroom or inspection station.