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Loading Capacities BS449 Bolt Grade 6.8

Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data
Structural Stress Deflection Calculators, Equations

Loading Capacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 6.8

Related: Method and Equations of Analysis BS449: Part 2

Dia.
mm
Tensile
Area
mm2
Tension
Capacity
@
210 N/mm2
Shear
Capacity
@
140 N/mm2
Bolt Grade = 68
Bearing Capacity of Bolts in kN for End Distance >= 2d
Bolt Bearing Strength = 438 N/mm2
Ply Bearing Strength: = 250 N/mm2
Bearing (Ply) Thickness Passed Through, mm
Shank
kN
Threads
kN
Single
kN
Double
kN
5
mm
6
mm
7
mm
8
mm
9
mm
10
mm
12.5
mm
15
mm
20
mm
25
mm
M 1.6
1.27
0.422
0.267
0.281
0.562
2.0
2.4
2.8
3.2
3.6
4.0
5.0
6.0
8.0
10.0
M 2
2.07
0.66
0.435
0.44
0.88
2.5
3.0
3.5
4.0
4.5
5.0
6.3
7.5
10.0
12.5
M 2.5
3.39
1.03
0.712
0.687
1.374
3.1
3.8
4.4
5.0
5.6
6.3
7.8
9.4
12.5
15.6
M 3
5.03
1.48
1.06
0.99
1.98
3.8
4.5
5.3
6.0
6.8
7.5
9.4
11.3
15.0
18.8
M 4
8.78
2.64
1.84
1.76
3.52
5.0
6.0
7.0
8.0
9.0
10.0
12.5
15.0
20.0
25.0
M 5
14.2
4.12
2.98
2.75
5.5
6.3
7.5
8.8
10.0
11.3
12.5
15.6
18.8
25.0
31.3
M 6
20.1
5.94
4.22
3.96
7.92
7.5
9.0
10.5
12.0
13.5
15.0
18.8
22.5
30.0
37.5
M 8
36.6
10.6
7.69
7.04
14.08
10.0
12.0
14.0
16.0
18.0
20.0
25.0
30.0
40.0
50.0
M 10
58
16.5
12.2
11
22
12.5
15.0
17.5
20.0
22.5
25.0
31.3
37.5
50.0
62.5
M 12
84.3
23.8
17.7
15.8
31.6
15.0
18.0
21.0
24.0
27.0
30.0
37.5
45.0
60.0
75.0
(M 14)
115
32.3
24.2
21.6
43.2
17.5
21.0
24.5
28.0
31.5
35.0
43.8
52.5
70.0
87.5
M 16
157
42.2
33
28.1
56.2
20.0
24.0
28.0
32.0
36.0
40.0
50.0
60.0
80.0
100.0
(M 18)
192
53.4
40.3
35.6
71.2
22.5
27.0
31.5
36.0
40.5
45.0
56.3
67.5
90.0
112.5
M 20
245
66
51.5
44
88
25.0
30.0
35.0
40.0
45.0
50.0
62.5
75.0
100.0
125.0
(M 22)
303
79.8
63.6
53.2
106.4
27.5
33.0
38.5
44.0
49.5
55.0
68.8
82.5
110.0
137.5
M 24
353
95
74.1
63.3
126.6
30.0
36.0
42.0
48.0
54.0
60.0
75.0
90.0
120.0
150.0
(M 27)
459
120.2
96.4
80.2
160.4
33.8
40.5
47.3
54.0
60.8
67.5
84.4
101.3
135.0
168.8
M 30
561
148.4
117.8
99
198
37.5
45.0
52.5
60.0
67.5
75.0
93.8
112.5
150.0
187.5
(M 33)
694
179.6
145.7
119.7
239.4
41.3
49.5
57.8
66.0
74.3
82.5
103.1
123.8
165.0
206.3
M 36
817
213.8
171.6
142.5
285
45.0
54.0
63.0
72.0
81.0
90.0
112.5
135.0
180.0
225.0
(M 39)
976
250.9
205
167.2
334.4
48.8
58.5
68.3
78.0
87.8
97.5
121.9
146.3
195.0
243.8
M 42
1120
290.9
235.2
194
388
52.5
63.0
73.5
84.0
94.5
105.0
131.3
157.5
210.0
262.5
(M 45)
1300
334
273
222.7
445.4
56.3
67.5
78.8
90.0
101.3
112.5
140.6
168.8
225.0
281.3
M 48
1470
380
308.7
253.3
506.6
60.0
72.0
84.0
96.0
108.0
120.0
150.0
180.0
240.0
300.0
(M 52)
1760
446
369.6
297.3
594.6
65.0
78.0
91.0
104.0
117.0
130.0
162.5
195.0
260.0
325.0
M 56
2030
517.2
426.3
344.8
689.6
70.0
84.0
98.0
112.0
126.0
140.0
175.0
210.0
280.0
350.0
(M 60)
2360
593.8
495.6
395.8
791.6
75.0
90.0
105.0
120.0
135.0
150.0
187.5
225.0
300.0
375.0
M 64
2680
675.6
562.8
450.4
900.8
80.0
96.0
112.0
128.0
144.0
160.0
200.0
240.0
320.0
400.0
(M 68)
3060
762.7
642.6
508.4
1016.8
85.0
102.0
119.0
136.0
153.0
170.0
212.5
255.0
340.0
425.0

Notes:

Font/Color Key:
(Red): Bearing Critical;
(Black): Bearing > Single Shear;
(Green): Bearing > Double Shear

Sizes given within (brackets) are non-preferred

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