Table 37

ARow
BTypical Pitch
Diameter
(inches)
CDiametral
Pitch
DPitch
(n/DP)
EAddendum
(1/DP)
FWhole
Depth
(Pitch x .686)
GWorm Thread Profile
(20° Pressure Angle)
3.000* 4.7854.2500.5388Worm Thread Profile - 3.000
2.5005.6283.2000.4310Worm Thread Profile - 2.500
2.000* 6.5236.1667.3592Worm Thread Profile - 2.000
1.7507.4488.1429.3079Worm Thread Profile - 1.750
1.500* 8.3927.1250.2694Worm Thread Profile - 1.500
1.3759.3491.1111.2395Worm Thread Profile - 1.375
1.250* 10.3142.1000.2155Worm Thread Profile - 1.250
1.12511.2856.0909.1959Worm Thread Profile - 1.125
1.000* 12.2618.0833.1796Worm Thread Profile - 1.000
0.81314.2244.0714.1539Worm Thread Profile - 0.813
0.625* 16.1963.0625.1347Worm Thread Profile - 0.625
0.58318.1745.0556.1197Worm Thread Profile - 0.583
0.54220.1571.0500.1078Worm Thread Profile - 0.542
0.500* 24.1309.0417.0898Worm Thread Profile - 0.500
0.46928.1122.0357.0700Worm Thread Profile - 0.469
0.438* 32.0982.0313.0673Worm Thread Profile - 0.438
0.40740.0785.0250.0539Worm Thread Profile - 0.407
0.375* 48.0654.0208.0449Worm Thread Profile - 0.375

* Denotes Popular Diametral Pitch Sizes