Technical Data:
Series: 368
Product type: Holtest (Type II), Three-Point Bore Micrometer
Measurement: Inside diameter
Contact points: Alloy steel
Accuracy: Same accuracy class as titanium-coated Holtest models
Constant-force device: Yes
Feature: Stable three-point bore measurement
Feature: Deep-hole measurement possible using an optional extension rod
Setting rings: Optional for individual models
Measuring range: 16 - 20 mm
Graduation: 0.005 mm
Accuracy: +/-3 um
Optional extension rod: 952621 (150 mm)

Dimensions:
Maximum measuring depth L2=82 mm
Overall/reference length L1=126 - 130 mm
Blind-hole reference L3=2.6 or below mm
Blind-hole reference L5=3.5 mm
External appearance varies by measuring range