Spi MS1361-08C Outside Micrometer 1 Inch 0.0005 Grad

Product Description

The SPI MS1361-08C is a mechanical outside micrometer built for precise external dimensional measurement in professional machining, toolroom, and inspection environments. It covers a 1-inch measurement range with a 0.0005-inch graduation and an accuracy of 0.0001 inches, making it suitable for close-tolerance work on shafts, pins, stock, and machined components. The ratchet stop thimble provides consistent measuring force to reduce operator-variable error. The unit ships calibrated and includes a NIST Certificate of Traceability, meeting documentation requirements for quality-controlled shops and ISO-audited facilities.

This micrometer is used in manufacturing, maintenance, and metrology applications where outside diameters and thickness measurements must be taken to four-decimal-inch precision. Typical users include machinists, tool-and-die makers, quality control technicians, and maintenance mechanics working on close-tolerance assemblies. The ratchet stop thimble and rotating spindle design suit both bench measurement and in-process inspection on the shop floor.

Key Features

• 1-inch measurement range for small-diameter and thin-stock applications
• 0.0005-inch graduation for four-decimal reading precision
• 0.0001-inch accuracy for close-tolerance inspection work
• Ratchet stop thimble delivers repeatable, consistent measuring force
• Calibrated at the factory with included NIST Certificate of Traceability
• No digital counter — purely mechanical readout, no batteries required

Compatibility

Designed as a standard 0-to-1-inch range outside micrometer suitable for general-purpose dimensional inspection of external features including round stock, flat stock, and machined parts within the stated range.

Installation Notes

Outside micrometers require no installation but should be stored in their protective case when not in use to protect the measuring faces and spindle thread. Before use, verify the zero setting against the reference standard and clean measuring faces with a lint-free cloth. Avoid dropping or impacting the frame, as this can shift calibration. Recalibration against a certified gauge block is recommended after any impact event or on a scheduled quality interval.