MIL-DTL-85667/5B
TABLE II. Mechanical properties.
Dia
Ultimate
Thread
Double
Pin Test
Pin Test
Fatigue Test
Dash
Tensile
Area
Shear
Diameter
Dia Area
Loading Lbs ± 2%
In2
In2
Number
Strength
Strength
(± .0005)
(c)
Lbs-Min
(b)
Lbs-Min
In
(a)
Max
Min
(b)
(a)
(a)
-3
3,620
.0226
5,380
.1900
.0284
1,450
145
-4
6,470
.0404
9,300
.2500
.0491
2,590
259
-5
10,200
.0640
14,600
.3125
.0767
4,080
408
-6
15,200
.0951
21,000
.3750
.1104
6,080
608
-7
20,600
.1288
28,600
.4375
.1503
8,240
824
-8
27,500
.1717
37,300
.5000
.1963
11,000
1100
-9
34,800
.2176
47,200
.5625
.2485
13,920
1392
-10
43,600
.2724
58,300
.6250
.3068
17,440
1744
-12
63,200
.3953
83,900
.7500
.4418
25,280
2528
-14
86,300
.5392
114,200
.8750
.6013
34,520
3452
-16
112,000
.7027
149,200
1.000
.7854
44,800
4480
(a) Shear test performed on pins ground to pin test diameter. The shear values are based on a
minimum shear strength of 95 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 at 160 ksi tensile strength.
(c) Maximum fatigue load is based on 40% 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
5
.312
.353
.696
.759
.353
.420
.904
6
.375
.415
.758
.821
.415
.483
.967
7
.438
.478
.821
.884
.478
.545
1.029
8
.500
.540
.883
.946
.540
.608
1.092
9
.562
.603
.946
1.009
.603
.670
1.154
10
.625
.665
1.008
1.071
.665
.733
1.217
11
.688
.728
1.071
1.134
.728
.795
1.279
12
.750
.790
1.133
1.196
.790
.858
1.342
13
.812
.853
1.196
1.259
.853
.920
1.404
14
.875
.915
1.258
1.321
.915
.983
1.467
15
.938
.978
1.321
1.384
.978
1.045
1.529
16
1.000
1.040
1.383
1.446
1.040
1.108
1.592
17
1.062
1.103
1.446
1.509
1.103
1.170
1.654
18
1.125
1.165
1.508
1.571
1.165
1.233
1.717
19
1.188
1.228
1.571
1.634
1.228
1.295
1.779
20
1.250
1.290
1.633
1.696
1.290
1.358
1.842
21
1.312
1.353
1.696
1.759
1.353
1.420
1.904
22
1.375
1.415
1.415
1.758
1.821
1.483
1.967
23
1.438
1.884
1.545
2.029
24
1.500
1.946
1.608
2.092
25
1.562
2.009
1.670
2.154
26
1.625
2.071
1.733
2.217
27
1.688
2.134
1.795
2.279
28
1.750
2.196
2.342
1.858
29
1.812
1.920
2.404
30
1.875
1.983
2.467
3
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