Specification for internal micrometers (including stick micrometers)
Specification for internal micrometers (including stick micrometers)
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1 Scope This standard specifies requirements for internal micrometers comprising a measuring head, extension rods with or without spacing collars, and, in the smaller sizes, a handle. Provision is made for three sizes of measuring heads, in both metric and inch units, as shown in Table 1 and Table 2.
NOTE Attention is drawn to the fact that metric dimensions are not necessarily direct conversions of the imperial dimensions.
Table 1 — Measuring heads — metric measurements
Size of head
Length of graduated scale on barrel
Usual ranges of the instrument when used with extension rods
Другие стандарты BS