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Loading Capacities BS449 Grade 8.8 Bolts

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Structural Stress Deflection Calculators, Equations

Loading Capacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 8.8

Related: Method and Equations of Analysis BS449: Part 2

Dia.
mm
Tensile
Area
mm2
Tension
Capacity Pt
@
281 N/mm2
Shear
Capacity
@
187 N/mm2
Bolt Grade = 8.8
Bearing Capacity of Bolts in kN for End Distance >= 2d
Bolt Bearing Strength = 585 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
0.565
0.357
0.376
0.752
2.0
2.4
2.8
3.2
3.6
4.0
5.0
6.0
8.0
10.0
M 2
2.07
0.883
0.582
0.587
1.174
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
1.38
0.953
0.918
1.836
3.1
3.8
4.4
5.0
5.6
6.3
7.8
9.4
12.5
15.6
M 3
5.03
1.99
1.41
1.32
2.64
3.8
4.5
5.3
6.0
6.8
7.5
9.4
11.3
15.0
18.8
M 4
8.78
3.53
2.47
2.35
4.7
5.0
6.0
7.0
8.0
9.0
10.0
12.5
15.0
20.0
25.0
M 5
14.2
5.52
3.99
3.67
7.34
6.3
7.5
8.8
10.0
11.3
12.5
15.6
18.8
25.0
31.3
M 6
20.1
7.95
5.65
5.29
10.58
7.5
9.0
10.5
12.0
13.5
15.0
18.8
22.5
30.0
37.5
M 8
36.6
14.1
10.3
9.4
18.8
10.0
12.0
14.0
16.0
18.0
20.0
25.0
30.0
40.0
50.0
M 10
58
22.1
16.3
14.7
29.4
12.5
15.0
17.5
20.0
22.5
25.0
31.3
37.5
50.0
62.5
M 12
84.3
31.8
23.7
21.1
42.2
15.0
18.0
21.0
24.0
27.0
30.0
37.5
45.0
60.0
75.0
(M 14)
115
43.3
32.3
28.8
57.6
17.5
21.0
24.5
28.0
31.5
35.0
43.8
52.5
70.0
87.5
M 16
157
56.5
44.1
37.6
75.2
20.0
24.0
28.0
32.0
36.0
40.0
50.0
60.0
80.0
100.0
(M 18)
192
71.5
54
47.6
95.2
22.5
27.0
31.5
36.0
40.5
45.0
56.3
67.5
90.0
112.5
M 20
245
88.3
68.8
58.7
117.4
25.0
30.0
35.0
40.0
45.0
50.0
62.5
75.0
100.0
125.0
(M 22)
303
106.8
85.1
71.1
142.2
27.5
33.0
38.5
44.0
49.5
55.0
68.8
82.5
110.0
137.5
M 24
353
127.1
99.2
84.6
169.2
30.0
36.0
42.0
48.0
54.0
60.0
75.0
90.0
120.0
150.0
(M 27)
459
160.9
129
107.1
214.2
33.8
40.5
47.3
54.0
60.8
67.5
84.4
101.3
135.0
168.8
M 30
561
198.6
157.6
132.2
264.4
37.5
45.0
52.5
60.0
67.5
75.0
93.8
112.5
150.0
187.5
(M 33)
694
240.3
195
159.9
319.8
41.3
49.5
57.8
66.0
74.3
82.5
103.1
123.8
165.0
206.3
M 36
817
286
229.6
190.3
380.6
45.0
54.0
63.0
72.0
81.0
90.0
112.5
135.0
180.0
225.0
(M 39)
976
335.7
274.3
223.4
446.8
48.8
58.5
68.3
78.0
87.8
97.5
121.9
146.3
195.0
243.8
M 42
1120
389.3
314.7
259.1
518.2
52.5
63.0
73.5
84.0
94.5
105.0
131.3
157.5
210.0
262.5
(M 45)
1300
446.9
365.3
297.4
594.8
56.3
67.5
78.8
90.0
101.3
112.5
140.6
168.8
225.0
281.3
M 48
1470
508.5
413.1
338.4
676.8
60.0
72.0
84.0
96.0
108.0
120.0
150.0
180.0
240.0
300.0
(M 52)
1760
596.8
494.6
397.1
794.2
65.0
78.0
91.0
104.0
117.0
130.0
162.5
195.0
260.0
325.0
M 56
2030
692.1
570.4
460.6
921.2
70.0
84.0
98.0
112.0
126.0
140.0
175.0
210.0
280.0
350.0
(M 60)
2360
794.5
663.2
528.7
1057.4
75.0
90.0
105.0
120.0
135.0
150.0
187.5
225.0
300.0
375.0
M 64
2680
904
753.1
601.6
1203.2
80.0
96.0
112.0
128.0
144.0
160.0
200.0
240.0
320.0
400.0
(M 68)
3060
1020.5
859.9
679.1
1358.2
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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