Operation Manual

612 Tables and overviews
9.1 Thread pitch
Q = 14 UNF US fine-pitch thread
Q = 15 UNEF US extra-fine-pitch thread
Thread
designation
Diameter
(in mm)
Thread pitch
Thread
designation
Diameter
(in mm)
Thread pitch
0.06'' 1.524 0.3175 3/8'' 9.525 1.058333333
0.073'' 1.8542 0.352777777 7/16'' 11.1125 1.27
0.086'' 2.1844 0.396875 1/2'' 12.7 1.27
0.099'' 2.5146 0.453571428 9/16'' 14.2875 1.411111111
0.112'' 2.8448 0.529166666 5/8'' 15.875 1.411111111
0.125'' 3.175 0.577272727 3/4'' 19.05 1.5875
0.138'' 3.5052 0.635 7/8'' 22.225 1.814285714
0.164'' 4.1656 0.705555555 1'' 25.4 1.814285714
0.19'' 4.826 0.79375 1 1/8'' 28.575 2.116666667
0.216'' 5.4864 0.907142857 1 1/4'' 31.75 2.116666667
1/4'' 6.35 0.907142857 1 3/8'' 34.925 2.116666667
5/16'' 7.9375 1.058333333 1 1/2'' 38.1 2.116666667
Thread
designation
Diameter
(in mm)
Thread pitch
Thread
designation
Diameter
(in mm)
Thread pitch
0.216'' 5.4864 0.79375 1 1/16'' 26.9875 1.411111111
1/4'' 6.35 0.79375 1 1/8'' 28.575 1.411111111
5/16'' 7.9375 0.79375 1 3/16'' 30.1625 1.411111111
3/8'' 9.525 0.79375 1 1/4'' 31.75 1.411111111
7/16'' 11.1125 0.907142857 1 5/16'' 33.3375 1.411111111
1/2'' 12.7 0.907142857 1 3/8'' 34.925 1.411111111
9/16'' 14.2875 1.058333333 1 7/16'' 36.5125 1.411111111
5/8'' 15.875 1.058333333 1 1/2'' 38.1 1.411111111
11/16'' 17.4625 1.058333333 1 9/16'' 39.6875 1.411111111
3/4'' 19.05 1.27 1 5/8'' 41.275 1.411111111
13/16'' 20.6375 1.27 1 11/16'' 42.8625 1.411111111
7/8'' 22.225 1.27 1 3/4'' 44.45 1.5875
15/16'' 23.8125 1.27 2'' 50.8 1.5875
1'' 25.4 1.27