The indicator has a 0.375" diameter stem, a #4-48 UNF contact point thread mount, and is used to measure surface variations in fractional inches.
Spindle rack, pinions and pivots of hardened stainless steel to insure long wear and perfect accuracy.
The dial indicator comes with a choice of flat or lug back for a variety of mounting options.
Flat back dial indicators are either clamp-mounted on the stem or plate-mounted on the rear of the indicator.
Lug back dial indicators have a protrusion with a hole to mount the indicator using a lug or nut and bolt.
This dial indicator meets ANSI standards, Japanese Industrial Standard (JIS) B7503-1997, and American Gage Design (AGD) standards for face and thread size, and bezel and stem diameter.