HEIDENHAIN SW 688945-03 - Manual (Page 572)

572 Tables and overviews
9.1 Thr
e
ad pitc
h Q = 18 NPSC U.S. cylindrical pipe thread with lubricant
Q = 19 NPFS U.S. cylindrical pipe thread without lubricant
Thread
designation Diameter
(in mm)
Thread pitch
Thread
designation Diameter
(in mm)
Thread pitch
1/8“ 10.287 0.94074074 1 1/2“ 48.26 2.208695652
1/4“ 13.716 1.411111111 2“ 60.325 2.208695652
3/8“ 17.145 1.411111111 2 1/2“ 73.025 3.175
1/2“ 21.336 1.814285714 3“ 88.9 3.175
3/4“ 26.67 1.814285714 3 1/2“ 101.6 3.175
1“ 33.401 2.208695652 4“ 114.3 3.175
1 1/4“ 42.164 2.208695652
Thread
designation Diameter
(in mm)
Thread pitch
Thread
designation Diameter
(in mm)
Thread pitch
1/16“ 7.938 0.94074074 1/2“ 21.336 1.814285714
1/8“ 10.287 0.94074074 3/4“ 26.67 1.814285714
1/4“ 13.716 1.411111111 1“ 33.401 2.208695652
3/8“ 17.145 1.411111111