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Standard Mil-T-27 Cases Dimensions (inches)

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Standard Mil-T-27 Cases Dimensions

Case SymbolCase DimensionsMilitary Dimensions
LWHMLMWF
AF3/43/41 1/813/16 *—4/40 x 3/8
AG111 3/81 1/8 *—6 – 32 x 3/8
AH1 5/161 5/161 3/4S:1 1/4—6 – 32 x 3/8
AJ1 5/81 5/82 3/81 1/161 3/166 – 32 x 3/8
EA1 15/161 11/162 1/41 3/81 1/46 – 32 x 3/8
EB1 13/161 13/162 1/161 3/81 1/46 – 32 x 3/8
FA2 3/162 1/163 1/81 11/161 7/166 – 32 x 3/8
FB2 5/162 1/162 1/21 11/161 7/166 – 32 x 3/8
GA2 3/42 3/83 13/162 1/81 3/46 – 32 x 3/8
GB2 3/42 3/82 13/162 1/81 3/46 – 32 x 3/8
HA3 1/162 5/84 1/42 19/641 35/646 – 32 x 3/8
HB3 1/162 5/83 3/162 19/641 35/648 – 32 x 3/8
JA3 9/163 1/164 7/82 5/82 1/88 – 32 x 3/8
JB3 9/163 1/163 7/82 3/82 1/88 – 32 x 3/8
KA3 15/163 3/85 1/432 1/1610 – 32 x 1/2
KB3 15/163 3/184 5/1632 1/1610 – 32 x 1/2
LA4 3/163 11/165 9/163 5/162 11/1610 – 32 x 1/2
LB4 3/163 11/164 1/23 3/162 11/1610 – 32 x 1/2
MA4 11/16463 11/1631/4 – 20 x 5/8
MB4 11/1644 15/163 11/1631/4 – 20 x 5/8
NA5 1/164 5/166 13/164 1/163 1/161/4 – 20 x 5/8
NB5 1/164 5/165 1/24 1/163 5/161/4 – 20 x 5/8
OA5 1/24 1/26 3/43 3/431/4 – 20 x 5/8
* Not in conformance with MIL-T-27S: Two studs in a diagonal.
YYAll metal cases not included above or with non-standard mounting canters.
ZZOpen type and encapsulated units.
1.Tolerances on dimensions L and W are +0 to -1/16 for cases AF, AG, AH and AJ; +0 to -1/8 for all other cases.
2.Tolerances on dimension H are +0 to – 1/8 for cases AF, AG, AH, and AJ; +0 to -3/16 for all other cases.
3.Tolerances on dimensions ML and MW are ±1/16 for cases AJ to JB inclusive: ±1/32 for cases KA to LB, inclusive; and ±3/64 for cases MA to CA, inclusive. When mounting studs or holes for inserts are used, they shall be symmetrically locked.
4.Screw-stud lengths are from mounting surface and have a length tolerance of ±1/16 on studs 1/2″ long or less and ±1/8 on studs over 1/2″ long.

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