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 12 x 2
|
8.528
|
9.000
|
S 14 x 2
|
10.528
|
11.000
|
S 16 x 2
|
12.528
|
13.000
|
S 18 x 2
|
14.528
|
15.000
|
S 20 x 2
|
16.528
|
17.000
|
S 22 x 3
|
16.794
|
17.500
|
S 24 x 3
|
18.794
|
19.500
|
S 26 x 3
|
20.794
|
21.500
|
S 28 x 3
|
22.794
|
23.500
|
S 30 x 3
|
24.794
|
25.500
|
S 32 x 3
|
26.794
|
27.500
|
S 34 x 3
|
28.794
|
29.500
|
S 36 x 3
|
30.794
|
31.500
|
S 38 x 3
|
32.794
|
33.500
|
S 40 x 3
|
34.794
|
35.500
|
S 42 x 3
|
36.794
|
37.500
|
S 44 x 3
|
38.794
|
39.500
|
S 46 x 3
|
40.794
|
41.500
|
S 48 x 3
|
42.794
|
43.500
|
S 50 x 3
|
44.794
|
39.500
|
S 52 x 3
|
46.794
|
47.500
|
S 55 x 3
|
49.794
|
50.500
|
S 60 x 3
|
54.794
|
55.500
|
S 65 x 4
|
58.058
|
59.000
|
S 70 x 4
|
63.058
|
64.000
|
S 75 x 4
|
68.058
|
69.000
|
S 80 x 4
|
73.058
|
74.000
|
S 85 x 4
|
78.058
|
79.000
|
S 90 x 4
|
83.058
|
84.000
|
S 95 x 4
|
88.058
|
89.000
|
S 100 x 4
|
93.058
|
94.000
|
S 105 x 4
|
98.058
|
99.000
|
S 110 x 4
|
103.058
|
104.000
|
S 115 x 6
|
104.587
|
106.000
|
S 120 x 6
|
109.587
|
111.000
|
S 125 x 6
|
114.587
|
116.000
|
S 130 x 6
|
119.587
|
121.000
|
S 135 x 6
|
124.587
|
126.000
|
S 140 x 6
|
129.587
|
131.000
|
S 145 x 6
|
134.587
|
136.000
|
S 150 x 6
|
139.587
|
141.000
|
S 155 x 6
|
144.587
|
146.000
|
S 160 x 6
|
149.587
|
151.000
|
S 165 x 6
|
154.587
|
156.000
|
S 170 x 6
|
159.587
|
161.000
|
S 175 x 8
|
161.116
|
163.000
|
S 180 x 8
|
166.116
|
168.000
|
S 185 x 8
|
171.116
|
173.000
|
S 190 x 8
|
176.116
|
178.000
|
S 195 x 8
|
181.116
|
183.000
|
S 200 x 8
|
186.116
|
188.000
|
S 210 x 8
|
196.116
|
198.000
|
S 220 x 8
|
206.116
|
208.000
|
S 230 x 8
|
216.116
|
218.000
|
S 240 x 8
|
226.116
|
228.000
|
S 250 x 12
|
229.174
|
232.000
|
S 260 x 12
|
239.174
|
242.000
|
S 270 x 12
|
249.174
|
252.000
|
S 280 x 12
|
259.174
|
262.000
|
S 290 x 12
|
269.174
|
272.000
|
S 300 x 12
|
279.174
|
282.000
|
S 320 x 12
|
299.174
|
302.000
|
S 340 x 12
|
319.174
|
322.000
|
S 360 x 12
|
339.174
|
342.000
|
S 380 x 12
|
359.174
|
362.000
|
S 400 x 12
|
379.174
|
382.000
|
S 420 x 18
|
388.760
|
393.000
|
S 440 x 18
|
408.760
|
413.000
|
S 460 x 18
|
428.760
|
433.000
|
S 480 x 18
|
448.760
|
453.000
|
S 500 x 18
|
468.760
|
473.000
|
S 520 x 24
|
478.347
|
484.000
|
S 540 x 24
|
498.347
|
504.000
|
S 560 x 24
|
518.347
|
524.000
|
S 580 x 24
|
538.347
|
544.000
|
S 600 x 24
|
558.347
|
564.000
|
S 620 x 24
|
578.347
|
584.000
|