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Countersunk Bolt Loading Capacities Table
Engineering ISO Metric Hardware Design Data
Engineering ANSI Hardware Design Data
See Explanatory notes given below table. BS 5950-1: 2000 BS 4190: 2001, BS 4933
Countersunk Bolt Loading Capacities Table
Non-Preloaded Countersunk Bolts
Grade 4.6 Countersunk Bolts material S355
Diameter of Bolt mm |
Tensile Stress Area At mm² |
Tension Capacity |
Shear Capacity |
Bearing Capacity in kN (Minimum of Pbb and Pbs ) End distance equal to 2 x bolt diameter Thickness in mm of material passed through |
||||||||||||
Nominal 0.8 At pt Pnom kN |
Exact At pt Pt kN |
Single Shear Ps kN |
Double Shear 2 Ps kN |
5 |
6 |
7 |
8 |
9 |
10 |
12 |
15 |
20 |
25 |
30 |
||
12 |
84.3 |
16.2 |
20.2 |
13.5 |
27.0 |
11.0 |
16.6 |
22.1 |
27.6 |
33.1 |
38.6 |
49.7 |
66.2 |
93.8 |
121 |
149 |
16 |
157 |
30.1 |
37.7 |
25.1 |
50.2 |
7.36 |
14.7 |
22.1 |
29.4 |
36.8 |
44.2 |
58.9 |
81.0 |
118 |
155 |
191 |
20 |
245 |
47.0 |
58.8 |
39.2 |
78.4 |
0 |
9.20 |
18.4 |
27.6 |
36.8 |
46.0 |
64.4 |
92.0 |
138 |
184 |
230 |
22 |
303 |
58.2 |
72.7 |
48.5 |
97.0 |
0 |
5.06 |
15.2 |
25.3 |
35.4 |
45.5 |
65.8 |
96.1 |
147 |
197 |
248 |
24 |
353 |
67.8 |
84.7 |
56.5 |
113 |
0 |
0 |
11.0 |
22.1 |
33.1 |
44.2 |
66.2 |
99.4 |
155 |
210 |
265 |
27 |
459 |
88.1 |
110 |
73.4 |
147 |
0 |
0 |
3.11 |
15.5 |
27.9 |
40.4 |
65.2 |
102 |
165 |
227 |
289 |
30 |
561 |
108 |
135 |
89.8 |
180 |
0 |
0 |
0 |
6.90 |
20.7 |
34.5 |
62.1 |
104 |
173 |
242 |
311 |
The tensile stress area (At ) is obtained from standards
The tension capacity of the bolt is given by:
Pnom = 0.8ptAt Nominal
Pt = ptAt Exact
Where:
pt is the tension strength of the bolt.
The shear capacity of the bolt is given by
PS = ps As
where:
ps is the shear strength of the bolt
As is the shear area of the bolt.
In the table, As has been taken as equal to At .
The shear capacity given in the tables must be reduced for large packings, large grip lengths, kidney shaped slots or long joints when applicable.
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