This Standard relates to micrometer heads having measuring ranges of: 1/2 inch; 1 inch; 13 mm.; and 25 mm. It applies to micrometer heads with rotatable spindles and with non-rotatable spindles, classed according to the following ranges of thimble diameter: - Type 1 = below 1 inch thimble diameter; type 2 = 1 inch and below 2 inch thimble diameter; and Type 3 = 2 inch thimble diameter and over.
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Edition: 1st Published: 01/01/1955 Number of Pages: 0