MARYLAND METRICS
THREAD DATA CHARTS

JAPANESE -- CONDUIT THREAD -- CTC (from 1/2" to 3")

80 deg

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CTC
MARYLAND METRICS -- THREAD DATA CHART:
JAPANESE -- ELECTRICAL CONDUIT THREAD JIS B0204
Basic Profile and Basic Size of Thin Steel Conduit External thread
Conduit Screw Thread (JIS B0204) form CTC Major dia. d Pitch dia. d2 Minor dia. d1
          Internal thread
Designation of screw thread Designation of applicable conduit Threads (per 25.4 mm) n Pitch P (Reference) Thread overlap H1 Major dia. D Pitch dia. D2 Minor dia. D1
CTC 19 19 16 1.5875 0.696 19.100 18 343 17.708
CTC 25 25 16 1.5875 0.696 25.400 24.643 24.008
CTC 31 31 16 1.5875 0.696 31.800 31.043 30.408
CTC 39 39 16 1.5875 0.696 38.100 37.345 36.708
CTC 51 51 16 1.5875 0.696 50.800 50.043 49.408
CTC 63 63 16 1.5875 0.696 63.500 62.743 62.108
CTC 75 75 16 1.5875 0.696 76.200 75.443 74.808
unit: mm  

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