3M 26135, PPS Series 2.0 Adapter, Type S40, Trapezoidal Thread, 7100135335 
Insize 3287-4, GROOVE MICROMETER, 3-4″, 6928640327582
$701.92
Graduation .001″.
Measure width of grooves inside bores.
Non-rotating spindle.
Two graduations for inside and outside measurement.
Related products
Measuring/ Inspection Instruments
Insize 0020-A199, VIBRATION PEN (THREE PARAMETERS), 6974029777059
$1,044.21
Measuring/ Inspection Instruments
Insize 0213-A500, INFRARED THERMOMETER, -58?F~716?F/-50?C~380?C, 6940561934700
$79.29
Measuring/ Inspection Instruments
Insize 6140, DEPTH BASE ATTACHMENT, suitable for calipers with beam width (w) .630″, 6928640303579
$24.78