S. J. Thread

Precursor of the metric ISO-thread. The metric S.J.-thread was developed in 1898 following an agreement between German, French, Swiss and Belgian engineers in Zurich. The flank angle is 60°.

Screw Diameter
mm
Pitch
mm
Tapping Drill Size
mm
Nut Clearance Diameter
mm
Wrench Size
mm
6.0 1.00 4.60 4.70 12
7.0 1.00 5.60 5.70 13
8.0 1.25 6.25 6.38 15
9.0 1.25 7.25 7.38 16
10.0 1.50 7.90 8.05 18
11.0 1.50 8.90 9.05 19
12.0 1.75 9.55 9.73 21
14.0 2.00 11.20 11.40 23
16.0 2.00 13.20 13.40 26
18.0 2.50 14.50 14.75 29
20.0 2.50 16.50 16.75 32
22.0 2.50 18.50 18.75 35
24.0 3.00 19.80 20.10 38
27.0 3.00 22.80 23.10 42
30.0 3.50 25.10 25.45 46
33.0 3.50 28.10 28.45 50
36.0 4.00 30.40 30.80 54
39.0 4.00 33.40 33.80 58
42.0 4.50 35.70 36.15 63
45.0 4.50 38.70 39.15 67
48.0 5.00 41.00 41.50 71
52.0 5.00 45.00 45.50 77
56.0 5.50 48.30 48.85 82
60.0 5.50 52.30 52.85 88
64.0 6.00 55.60 56.20 94
68.0 6.00 59.60 60.20 100
72.0 6.50 62.90 63.55 105
76.0 6.50 66.90 67.55 110
80.0 7.00 70.20 70.90 116
S. J. Thread