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Countersunk Bolt Grade 10.9 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 Grade 10.9 Table
Non-Preloaded Countersunk Bolts
Grade 10.9 Countersunk Bolts material S355
Diameter of Bolt mm |
Tensile Stress Area A t 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 P nom 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 |
47.2 |
59.0 |
33.7 |
67.4 |
13.2 |
19.8 |
26.4 |
33.0 |
39.6 |
46.2 |
59.4 |
79.2 |
112 |
145 |
178 |
16 |
157 |
87.9 |
110 |
62.8 |
126 |
8.80 |
17.6 |
26.4 |
35.2 |
44.0 |
52.8 |
70.4 |
96.8 |
141 |
185 |
229 |
20 |
245 |
137 |
172 |
98.0 |
196 |
0 |
11.0 |
22.0 |
33.0 |
44.0 |
55.0 |
77.0 |
110 |
165 |
220 |
275 |
22 |
303 |
170 |
212 |
121 |
242 |
0 |
6.05 |
18.2 |
30.3 |
42.4 |
54.5 |
78.7 |
115 |
175 |
236 |
296 |
24 |
353 |
198 |
247 |
141 |
282 |
0 |
0 |
13.2 |
26.4 |
39.6 |
52.8 |
79.2 |
119 |
185 |
251 |
317 |
27 |
459 |
257 |
321 |
184 |
367 |
0 |
0 |
3.71 |
18.6 |
33.4 |
48.3 |
78.0 |
123 |
197 |
271 |
345 |
30 |
561 |
314 |
393 |
224 |
449 |
0 |
0 |
0 |
8.25 |
24.8 |
41.3 |
74.3 |
124 |
206 |
289 |
371 |
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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