Starrett 443Z-3RL Micrometer Depth Gage with Half Base 0-3" Range .001" Graduation

The Starrett 443Z-3RL is a precision micrometer depth gage designed for accurate measurement of holes, slots, shoulders, and projections. Featuring a compact 2" (50mm) half base, this depth micrometer excels in tight-clearance applications where standard bases cannot reach — including measurements close to shoulders and between obstructions.

Built to Starrett's exacting standards, the 443Z-3RL delivers ±0.0001" accuracy at the micrometer head and ±0.0002" accuracy across the measuring rods, with a 0.001" graduation for reliable, repeatable readings. The satin chrome finish on all reading surfaces reduces glare for improved readability in shop environments.

Key Features:

• Measurement Range: 0–3" with 0.001" graduations
• Half Base: 2" (50mm) base allows access to depths close to shoulders and between obstructions
• Combination Ratchet and Speeder: Ensures uniform measuring pressure and quicker adjustment
• 3 Interchangeable Measuring Rods: 5/32" (4mm) diameter with individual length adjustment to cover the full range
• Ring-Type Knurled Lock Nut: Provides quick, secure locking of the spindle position
• Hardened, Ground, and Lapped Surfaces: Base and all measuring surfaces are precision-finished for accuracy
• Accuracy: ±0.0001" (micrometer head), ±0.0002" (rods)
• Includes: 3 measuring rods, ratchet stop, lock nut, and padded protective case

The Starrett 443Z-3RL is made in the USA and is ideal for use in manufacturing, machining, metalworking, and mechanical engineering applications. It ships complete with a padded case for safe storage and transport. EDP No. 52171.