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Non-Preloaded Countersunk Bolts 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 Material S275 Table

Non-Preloaded Countersunk Bolts
Grade 10.9 Countersunk Bolts Material S275

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 ply 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
11.0
16.6
22.1
27.6
33.1
38.6
49.7
66.2
93.8
121
149
16
157
87.9
110
62.8
126
7.36
14.7
22.1
29.4
36.8
44.2
58.9
81.0
118
155
191
20
245
137
172
98.0
196
0
9.20
18.4
27.6
36.8
46.0
64.4
92.0
138
184
230
22
303
170
212
121
242
0
5.06
15.2
25.3
35.4
45.5
65.8
96.1
147
197
248
24
353
198
247
141
282
0
0
11.0
22.1
33.1
44.2
66.2
99.4
155
210
265
27
459
257
321
184
367
0
0
3.11
15.5
27.9
40.4
65.2
102
165
227
289
30
561
314
393
224
449
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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