![]() * Values are calculated for Length of engagement of 5xPitch. * Permisable values for thread Class 3B # Description Value (Inch) Value (mm) D 1 Minor Diameter 0.1449 - 0.1555 3.68 - 3.95 D 2 Pitch Diameter 0.1629 - 0.1662 4.138 - 4.221 D Major Diameter 0.1900 (Min) 4.826 (Min) α Varation of 30° anngle (+/-) 1.25 (Ref) 31.75 (Ref) P Varation of Pitch (+/-) 0.0009 (Ref) 0.023 (Ref) Forming Tap Thread Depth 75 Tap Drill Size Tap Drill Size Formula s Parameters: TD Tap Drill Diameter (mm / Inch) D Nominal Thread Diameter (mm / Inch) H Thread Depth (mm / Inch) Hmax Maximum thread depth according to thread standards. ![]() ![]() * Permisable values for thread Class 3A # Description Value (Inch) Value (mm) es Allowance 0 (Ref) 0 (Ref) d Major Diameter 0.1828 - 0.19 4.643 - 4.826 d 2 Pitch Diameter 0.1604 - 0.1629 4.074 - 4.138 d 3 Minor Diameter For calculations of different engagement length use the Thread Calculator ![]()
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