Tr pitch gauge trapezoidal tooth gauge trapezoidal thread model ACME30 degree Aikem tooth gauge T-type pitch gauge Tr

 
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brand:
Excellence
model:
JYTL30 2-20
place of origin:
Chinese mainland
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60° American standard thread center gauge 60° NPT thread template 60° American standard thread template 4-42 teeth 30° thread template JYTL3029 degree thread template JYTL29
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