MIL-PRF-19978/13C
TABLE III. Millimeter equivalent of inches.
Inches
mm
Inches
mm
Inches
mm
Inches
mm
0.005
0.13
0.625
15.88
1.094
27.79
1.625
41.28
0.015
0.38
0.656
16.66
1.125
28.58
1.781
45.24
0.016
0.41
0.670
17.02
1.156
29.36
1.812
46.02
0.031
0.79
0.719
18.26
1.188
30.17
1.875
47.63
0.047
1.19
0.750
19.05
1.219
30.96
1.906
48.41
0.062
1.57
0.781
19.84
1.250
31.75
2.031
51.59
0.175
4.45
0.812
20.62
1.281
32.54
2.062
52.37
0.195
4.95
0.844
21.44
1.312
33.32
2.125
53.98
0.235
5.97
0.875
22.23
1.375
34.93
2.156
54.76
0.312
7.92
0.906
23.01
1.406
35.71
2.281
57.94
0.400
10.16
0.938
23.72
1.438
36.53
2.375
60.33
0.406
10.31
0.969
24.61
1.469
37.31
2.531
64.29
0.468
11.89
1.000
25.40
1.500
38.10
2.562
65.07
0.500
12.70
1.031
26.19
1.531
38.89
2.625
66.68
0.562
14.27
1.062
26.97
1.562
39.67
2.656
67.46
Changes from previous issues. The margins of this specification are marked with vertical lines to indicate where
changes from previous issue were made. This was done as a convenience only and the Government assumes no
liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the
requirements of this document based on the entire content irrespective of the marginal notations and relationship to
the last previous issue.
Custodians:
Preparing activity:
Army - CR
DLA - CC
Navy - EC
Air Force - 85
(Project 5910-2012-021)
DLA - CC
Review activities:
Navy - MC
Air Force - 19, 99
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities change, you should verify the currency of the information above using the ASSIST
Online database at https://assist.dla.mil/ .
8