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BS EN ISO 898-1 Minimum ultimate tensile loads and proofing loads

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Minimum ultimate tensile loads and proofing loads BS EN ISO 898-1: Minimum ultimate tensile loads – ISO metric coarse pitch thread

 

Threada
Nominal
stress area
As,
nom (mm2)
Property class
3.6
4.6
4.8
5.6
5.8
6.8
8.8
9.8
10.9
12.9
Minimum ultimate tensile load (As x Rm), N
M3
5.03
1 660
2 010
2 110
2 510
2 620
3 020
4 020
4 530
5 230
6 140
M3.5
6.78
2 240
2 710
2 850
3 390
3 530
4 070
5 420
6 100
7 050
8 270
M4
8.78
2 900
3 510
3 690
4 390
4 570
5 270
7 020
7 900
9 130
10 700
M5
14.2
4 690
5 680
5 960
7 100
7 380
8 520
11 350
12 800
14 800
17 300
M6
20.1
6 630
8 040
8 440
10 000
10 400
12 100
16 100
18 100
20 900
24 500
M7
28.9
9 540
11 600
12 100
14 400
15 000
17 300
23 100
26 000
30 100
35 300
M8
36.6
12 100
14 600
15 400
18 300
19 000
22 000
29 200
32 900
38 100
44 600
M10
58
19 100
23 200
24 400
29 000
30 200
34 800
46 400
52 200
60 300
70 800
M12
84.3
27 800
33 700
35 400
42 200
43 800
50 600
67 400b
75 900
87 700
103 000
M14
115
38 000
46 000
48 300
57 500
59 800
69 000
92 000b
104 000
120 000
140 000
M16
157
51 800
62 800
65 900
78 500
81 600
94 000
125 000b
141 000
163 000
192 000
M18
192
63 400
76 800
80 600
96 000
99 800
115 000
159 000
–
200 000
234 000
M20
245
80 800
98 000
103 000
122 000
127 ,000
147 000
203 000
–
255 000
299 000
M22
303
100 000
121 000
127 000
152 000
158 000
182 000
252 000
–
315 000
370 000
M24
353
116 000
141 000
148 000
176 000
184 000
212 000
293 000
–
367 000
431 000
M27
459
152 000
184 000
193 000
230 000
239 000
275 000
381 000
–
477 000
560 000
M30
561
185 000
224 000
236 000
280 000
292 000
337 000
466 000
–
583 000
684 000
M33
694
229 000
278 000
292 000
347 000
361 000
416 000
576 000
–
722 000
847 000
M36
817
270 000
327 000
343 000
408 000
425 000
490 000
678 000
–
850 000
997 000
M39
976
322 000
390 000
410 000
488 000
508 000
586 000
810 000
–
1 020 000
1 200 000

a Where no thread pitch is indicated in a thread designation, coarse pitch is specified. This is given in ISO 261 and ISO 262.
b For structural bolting 70 000, 95 500 and 130 000 N, respectively.

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