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°.

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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
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