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MIL-C-5501/5 1973 Edition, March 20, 1973
Complete Document
Superseded By:
CAPS AND PLUGS,PROTECTIVE,DUST & MOISTURE SEAL
Includes all amendments and changes through Cancellation Notice 1, August 17, 1998
Additional Comments: CNCL S/S BY NAS 840
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This specification is approved for use by all Departments and Agencies of the Department of Defense.

The complete requirements for procuring the plugs described herein shall consist of this document and the latest issue of specification MIL-C-5501. FIGURE TABLE I – ALUMINUM ALLOY
DASH     THREAD       A      B      C
         NO.     (NPT)      ±.04   ±.03   ±.03
        ----------------------------------------
          2      ⅛-27        .72    .25    .28
          4      ¼-18        .84    .25    .38
          6      ⅜-18        .97    .31    .41
          8      ½-14       1.22    .31    .50
         12      ¾-14       1.47    .38    .53
         16    1  -11-½     1.72    .38    .66
         20    1-¼-11-½     1.97    .50    .69
         24    1-½-11-½     2.22    .50    .69


FIGURE TABLE II – RIGID PLASTIC
SQUARE HEAD           ROUND HEAD
DASH     THREAD   --------------------------------------------
NO.      (NPT)     A      B      C     A-DIA    B      C
                  ±.03   ±.03   ±.03   ±.03    ±.03   ±.03
--------------------------------------------------------------
R2       ⅛-27      .28    .25    .31    .56     .25    .31
R4       ¼-18      .38    .25    .38    .75     .25    .31
R6       ⅜-18      .44    .25    .44    .88     .25    .34
R8       ½-14      .56    .25    .50   1.12     .38    .56

R12      ¾-14      .62    .25    .56   1.31     .41    .62
R16    1  -11-½    .88    .25    .62   1.62     .56    .75
R20    1-¼-11-½   1.00    .38    .88
R24    1-½-11-½   1.25    .38    .88