Because of its asymmetrical profile, the
buttress thread is well-suited for a high, unilaterally working axial load. The
thread is often used in spindle presses, lifting systems and for collet chucks
in lathes und milling machines.
The flank angle is 33°
Nominal
|
Bolt Thread
|
Tapping
|
Diameter
|
Minor Diameter
|
Drill Size
|
|
mm
|
mm
|
S 10 x 2
|
6.528
|
7.000
|
S 12 x 3
|
6.794
|
7.500
|
S 14 x 3
|
8.794
|
9.500
|
S 16 x 4
|
9.058
|
10.000
|
S 18 x 4
|
11.058
|
12.000
|
S 20 x 4
|
13.058
|
14.000
|
S 22 x 5
|
13.322
|
14.500
|
S 24 x 5
|
15.322
|
16.500
|
S 26 x 5
|
17.322
|
18.500
|
S 28 x 5
|
19.322
|
20.500
|
S 30 x 6
|
19.586
|
21.000
|
S 32 x 6
|
21.586
|
23.000
|
S 34 x 6
|
23.586
|
25.000
|
S 36 x 6
|
25.586
|
27.000
|
S 38 x 7
|
25.852
|
27.500
|
S 40 x 7
|
27.825
|
29.500
|
S 42 x 7
|
39.825
|
31.500
|
S 44 x 7
|
31.825
|
33.500
|
S 46 x 8
|
32.116
|
34.000
|
S 48 x 8
|
34.116
|
36.000
|
S 50 x 8
|
36.116
|
38.000
|
S 52 x 8
|
38.116
|
40.000
|
S 55 x 9
|
39.380
|
41.500
|
S 60 x 9
|
44.380
|
46.500
|
S 65 x 10
|
47.644
|
50.000
|
S 70 x 10
|
52.644
|
55.000
|
S 75 x 10
|
57.644
|
60.000
|
S 80 x 10
|
62.644
|
65.000
|
S 85 x 12
|
64.174
|
67.000
|
S 90 x 12
|
69.174
|
72.000
|
S 95 x 12
|
74.174
|
77.000
|
S 100 x 12
|
79.174
|
82.000
|
S 105 x 12
|
84.174
|
87.000
|
S 110 x 12
|
89.174
|
92.000
|
S 115 x 14
|
90.702
|
94.000
|
S 120 x 14
|
95.702
|
99.000
|
S 125 x 14
|
100.702
|
104.000
|
S 130 x 14
|
105.702
|
109.000
|
S 135 x 14
|
110.702
|
114.000
|
S 140 x 14
|
115.702
|
119.000
|
S 145 x 14
|
120.702
|
124.000
|
S 150 x 16
|
122.231
|
126.000
|
S 155 x 16
|
127.231
|
131.000
|
S 160 x 16
|
132.231
|
136.000
|
S 165 x 16
|
137.231
|
141.000
|
S 170 x 16
|
142.231
|
146.000
|
S 175 x 16
|
147.231
|
151.000
|
S 180 x 18
|
148.760
|
153.000
|
S 185 x 18
|
153.760
|
158.000
|
S 190 x 18
|
158.760
|
163.000
|
S 195 x 18
|
163.760
|
168.000
|
S 200 x 18
|
168.760
|
173.000
|
S 210 x 20
|
175.289
|
180.000
|
S 220 x 20
|
185.289
|
190.000
|
S 230 x 20
|
195.289
|
200.000
|
S 240 x 22
|
201.818
|
207.000
|
S 250 x 22
|
211.818
|
217.000
|
S 260 x 22
|
221.818
|
227.000
|
S 270 x 24
|
228.347
|
234.000
|
S 280 x 24
|
238.347
|
244.000
|
S 290 x 24
|
248.347
|
254.000
|
S 300 x 24
|
258.347
|
264.000
|