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BS EN 20898-2 Proof load values

Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data

BS EN 20898-2 Proof load values - Coarse thread

Thread
Thread
pitch
(mm)
Nominal
stress
area
of the
mandrel
As
(mm2)
Property class
04
05
4
5
6
8
9
10
12
Proof load (As x Sp) (N) style 2
-
-
style 1
style 1
style 1
style 1
style 2
style 2
style 1
style 1
style 2
M3
M3.5
M4
M5
M6
M7
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M39
0.5
0.6
0.7
0.8
1.0
1.0
1.25
1.5
1.75
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4 .0
5.03
6.78
8.78
14.2
20.1
28.9
36.6
58
84.3
115
157
192
245
303
353
459
561
694
817
976
1 910
2,580
3,340
5,400
7,640
11,000
13,900
22,000
32,000
43,700
59,700
73,000
93,100
115,100
134,100
174,400
213,200
263,700
310,500
370,900
2,500
3,400
4,400
7,100
10,000
14,500
18,300
29,000
42,200
57,500
78,500
96,000
122,500
151,500
176,500
229,500
280,500
347,000
408,500
488,000
-
-
-
-
-
-
-
-
-
-
-
97,900
125,000
154,500
180,000
234,100
286,100
353,900
416,700
497,800
,600
3,550
4,550
8,250
11,700
16,800
21,600
34,200
51,400
70,200
95,800
121,000
154,400
190,900
222,400
289,200
353,400
437,200
514,700
614,900
3,000
4,050
5,250
9,500
13,500
19,400
24,900
39,400
59,000
80,500
109,900
138,200
176,400
218,200
254,200
330,500
403,900
499,700
588,200
702,700
4,000
5,400
7,000
12,140
17,200
24,700
31,800
50,500
74,200
101,200
138,200
176,600
225,400
278,800
324,800
422,300
516,100
638,500
751,600
897,900
-
-
-
-
-
-
-
-
-
-
-
170,900
218,100
268,700
314,200
408,500
499,300
617,700
727,100
868,600
4,500
6,100
7,900
13,000
18,400
26,400
34,400
54,500
80,100
109,300
149,200
176,600
225,400
278,800
324,800
422,300
516,100
638,500
751,600
897,900
5,200
7,050
9,150
14,800
20,900
30,100
38,100
60,300
88,500
120,800,
164,900
203,500
259,700
321,200
374,200
486,500
594,700
735,600
866,000
1,035,000
5,700
7,700
10,000
16,200
22,900
32,900
41,700
66,100
98,600
134,600
183,700
-
-
-
-
-
-
-
-
-
5,800
7,800
10,100
16,300
23,100
33,200
42,500
67,300
100,300
136,900
186,800
230,400
294,400
363,600
423,600
550,800
673,200
832,800
980,400
1,171,000

BS EN 20898-2: Marking symbols for nuts with property classes in accordance with BS EN 20898-2 clause 3.1

BS EN 20898-2 Proof load values – Coarse thread

aThe marking dot cannot be replaced by the manufacturer’s mark.

BS EN 20898-2 Marking symbols for nuts with property classes in accordance with BS EN 20898-2 clause 3.2

Marking symbols for nuts with property

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