Spring Washer - Iso Metric Coarse Pitch Thread, Various Sizes M3 To M39, Proof Load Classes 3.6 To 20.0

Proof Loads ISO Metric Coarse Pitch Thread:



Threado(d)
NominalSizesareoAs, nom bmm2
Property Class


3.6
4.6
4.8
5.6
5.8
6.8
8.8
9.8
10.9
12.9


Proof Load (As, nom x Rm, min.), N


M3
5, 03
910
1130
1560
1410
1910
2210
2920
3270
4180
4880


M3.5
6, 78
1270
1530
2100
1900
2580
2980
3940
4410
5630
6480


M4
8, 78
1580
1980
27200
24600
3340
3860
5100
5710
7290
8520


M5
14, 2
2560
3200
4400
39800
5400
6250
8230
9230
11800
13800


M6
20, 1
3620
45200
62300
5630
7640
8840
11600
13100
16700
19500


M7
28, 9
5200
6500
89600
8090
11000
12700
16800
18800
24000
28000


M8
36, 6
65900
8240
11400
10200
13900
16100
21200
23800
30400
35500


M10
58
10400
13000
18000
16200
22000
25500
33700
37700
48100
56300


M12
84, 3
15200
19000
26100
23600
32000
37100
48900
54800
70000
81800


M14
115
20700
25900
35600
32200
43700
50600
667000
74800
95500
112000


M16
157
28300
35300
48700
44000
73000
69100
910000
102000
130000
152000


M18
192
346000
43200
59500
53800
93100
84500
115000
-
159000
186000


M20
245
44100
55100
76000
68600
115000
108000
147000
-
203000
238000


M22
303
54500
68200
93900
84800
134000
133000
182000
-
252000
294000


M24
353
63500
79400
109000
98800
174000
155000
212000
-
293000
342000


M27
459
82600
106300
142000
128000
213000
202000
275000
-
381000
445000


M30
561
101000
126000
174000
157000
213000
247000
337000
-
466000
544000


M33
694
125000
156000
215000
194000
264000
305000
416000
-
576000
673000


M36
817
147000
184000
253000
229000
310000
359000
490000
-
678000
792000


M39
976
176000
220000
303000
273000
371000
429000
586000
-
810000
947000






Where no thread pitch is indicated in a thread designation, coarse pitch is specified. This is given in ISO 261 and ISO 262.
To calculate as see 8.2
For structural bolting 70000 N, 95500 N and 130000 N, respectively.
Note:The tightening torques are calculated to indure approximate stresses as detail below.266 N/mm2 for property class 5.8308 N/mm2 for property class6.8448 N/mm2 for property class 8.8 dia. <M16462 N/mm2 for property class 8.8 dia. <M16658 N/mm2 for property class 10.9.