MIL-DTL-85667/3B
TABLE II. Mechanical properties.
Dia
Ultimate
Double Pin Test Pin Test
Max
Thread
Fatigue Test
Dash Tensile
Area
Shear
Diameter Dia Area
Install
Loading Lbs ± 2%
2
2
Number Strength
In
Strength (± .0005)
In
Torque
(c)
Lbs-Min
(b)
Lbs-Min
In
(a)
In-Lbs
Max
Min
(b)
(a)
(a)
-3
4,970
.0226
7,080
.1900
.0284
60
2,290
229
-4
8,870
.0404
12,300
.2500
.0491
115
3,800
380
-5
14,100
.0640
19,200
.3125
.0767
185
6,500
650
-6
20,900
.0951
27,600
.3750
.1104
335
9,620
962
-7
28,300
.1288
37,500
.4375
.1503
540
13,000
1,300
-8
37,800
.1717
49,200
.5000
.1963
805
17,400
1,740
-9
47,900
.2176
62,200
.5625
.2485
1,080
22,000
2,200
-10
59,900
.2724
76,700
.6250
.3068
1,560
27,600
2,760
-12
86,900
.3953
110,000
.7500
.4418
2,930
40,000
4,000
-14
119,000
.5392
150,000
.8750
.6013
4,340
54,700
5,470
-16
155,000
.7027
196,000
1.0000
.7854
6,100
71,300
7,130
(a) Shear test performed on pins ground to pin test diameter. The shear values are based on a
minimum shear strength of 125 ksi and the stress area at the test diameter.
(b) The ultimate tensile strength values are calculated on the basic pitch diameter of the external
thread.
(c) Maximum fatigue load is based on 46% of the ultimate tensile strength. Minimum fatigue load
is 10% of maximum fatigue load.
TABLE III. Bolt grips and lengths.
-3 Diameter
-4 Diameter
-5 Diameter
Grip
Bolt
Unthreaded
Unthreaded
Unthreaded
Number
Design
Pin Length
Bolt
Pin Length
Bolt
Pin Length
Bolt
Grip
(See Figure 1)
Length
(See Figure 1) Length
(See Figure 1) Length
.420
.759
.353
..696
.353
.904
.312
5
.483
.821
.415
.758
.415
.967
.375
6
.545
.884
.478
.821
.478
1.029
.438
7
.608
.946
.540
.883
.540
1.092
.500
8
.670
1.009
.603
.946
.603
1.154
.562
9
.733
1.071
.665
1.008
.665
1.217
.625
10
.795
1.134
.728
1.071
.728
1.297
.688
11
1.196
.858
.790
1.133
.790
1.342
.750
12
.920
1.259
.853
1.196
.853
1.404
.812
13
1.321
.915
1.258
.915
1.467
.875
.983
14
1.384
.978
1.321
.978
1.529
.938
1.045
15
1.446
1.040
1.383
1.040
1.592
1.000
1.108
16
1.509
1.103
1.446
1.103
1.654
1.062
1.170
17
1.571
1.165
1.508
1.165
1.717
1.125
1.233
18
1.634
1.228
1.571
1.228
1.779
1.188
1.295
19
1.696
1.290
1.633
1.290
1.842
1.250
1.358
20
1.759
1.353
1.696
1.353
1.904
1.312
1.420
21
1.821
1.415
1.758
1.415
1.967
1.375
1.483
22
1.884
2.029
1.438
1.545
23
1.946
2.092
1.500
1.608
24
2.009
2.154
1.562
1.670
25
2.071
2.217
1.625
1.733
26
2.134
2.279
1.688
1.795
27
2.196
2.342
1.750
1.858
28
2.404
1.812
1.920
29
2.467
1.875
1.983
30
3