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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