OverallPinBored hole dia.Bored hole dia.d1d2 ShankSize ofLength of
lengthlength (GO)(NOT-GO)lengthlength dia.squaresquare

CPR-T Check Pins for Bored Holes in thread form tapping (Taper Type) Specification ■ One CPR-T enables simple checking of bored hole dia. (for

thread forming taps, taper type).CPR-T is made from wear resistant HSS material is applicable for through hole and for blind hole having enough space in the bottom. For icon explanation, refer to P.50

TYPE:1 TYPE:2

Segment:7C

SizeCodeL (mm)ℓ (mm)d1 (mm)d2 (mm)ℓ1 (mm)ℓ2 (mm)Ds (mm)K (mm)ℓk (mm)TypeStock
For Metric Threads
M2×0.4CPRT2.0E4271.791.841632.551
M2.5×0.45CPRT2.5F4682.272.341.56.532.551
M2.6×0.45CPRT2.6F4682.372.441.56.532.551
M3×0.5CPRT3.0G468.52.752.821.5743.261
M4×0.7CPRT4.0I5210.53.653.722.258.255471
M5×0.8CPRT5.0K59.512.54.594.672.5105.54.571
M6×1CPRT6.0M61.516.55.495.593.7512.7564.571
M8×1.25CPRT8.0N9019.47.367.494.714.78692
M10×1.5CPRT010O10023.49.229.346.716.7108112
M10×1.25CPRT010N10023.49.359.496.716.7108112
M12×1.75CPRT012P11027.411.0911.237.719.7129122
M12×1.5CPRT012O11027.411.2211.347.719.7129122
M12×1.25CPRT012N11027.411.3611.507.719.7129122
For Unified Threads
No.2-56UNCCPRTUN2E4681.962.041.56.532.551
No.2-64UNFCPRTUN2D4681.982.061.56.532.551
No.3-48UNCCPRTUN3F4682.252.351.56.532.551
No.3-56UNFCPRTUN3E4682.292.371.56.532.551
No.4-40UNCCPRTUN4H468.52.542.641.5743.261
No.4-48UNFCPRTUN4F468.52.592.681.5743.261
No.5-40UNCCPRTUN5H468.52.872.971.5743.261
No.5-44UNFCPRTUN5G468.52.902.991.5743.261
No.6-32UNCCPRTUN6J5210.53.113.222.258.255471
No.6-40UNFCPRTUN6H5210.53.193.292.258.255471
No.8-32UNCCPRTUN8J5210.53.783.892.258.255471
No.8-36UNFCPRTUN8I5210.53.813.912.258.255471
No.10-24UNCCPRTUNAM59.512.54.304.442.5105.54.571
No.10-32UNFCPRTUNAJ59.512.54.444.532.5105.54.571
No.12-24UNCCPRTUNCM61.516.54.965.073.7512.7564.571
No.12-28UNFCPRTUNCK61.516.55.035.133.7512.7564.571
1/4-20UNCCPRTU04N61.516.55.735.863.7512.7564.571
1/4-28UNFCPRTU04K61.516.55.916.003.7512.7564.571