Starrett ST444.1BXRLZ Outside Micrometer Set 0-4 in 4 Pc

Product Description

The STARRETT ST444.1BXRLZ is a 4-piece mechanical outside micrometer set covering a measurement range of 0 to 4 inches in one-inch increments. Each micrometer features a ratchet thimble for consistent measuring pressure and solid carbide measuring faces for long-term wear resistance. The satin chrome finish reduces glare during use. Accuracy is rated at 0.0005 inches across the full range. This set is designed for machinists, tool-and-die technicians, and precision tradespeople who need reliable outside diameter and thickness measurement on the shop floor or in the field.

This micrometer set is suited for precision measurement applications in manufacturing, machining, HVAC component fabrication, and general mechanical trades. Each of the four micrometers covers a dedicated one-inch range, allowing quick selection without re-zeroing across a wide measurement span. The included case keeps all four instruments organized and protected between uses. The rotating spindle design is standard for outside micrometer work on round stock, flat stock, and machined parts.

Key Features

• 4-piece set covers 0 to 4 inches total measurement range in one-inch increments
• Ratchet thimble provides repeatable, consistent measuring pressure
• Solid carbide measuring faces resist wear for extended service life
• Satin chrome finish minimizes glare in shop lighting conditions
• Rated accuracy of 0.0005 inches
• Includes protective carrying case for storage and transport

Compatibility

Designed as a general-purpose outside micrometer set for precision measurement tasks requiring 0 to 4 inch range coverage across machining, fabrication, and mechanical trade applications.

Installation Notes

Outside micrometers require no installation but should be calibrated against a known standard or gauge block before use. Store instruments in the provided case away from temperature extremes and contaminants that can affect calibration. Clean measuring faces with a lint-free cloth before and after use. Adjustments or recalibration should be performed by a qualified metrologist or per the manufacturer's service procedure.