This product is a set of a calibration certificate, inspection report, and tresability system chart which were calibrated by the manufacturer.
One type of thread piece is fixed to one body.
Effective diameter of screw can be read directly (calculation is not required).
[Precautions]
Base point adjustment reference bar for 60° meters (UNF)
One base point adjustment reference bar is provided for each model (Except the measurement range of 0~25 mm). Base point adjustment reference bar is for 60° meter (Unified).
You will need a document address (company name and address) for your order.