MIL-DTL-9395/29C
QUALIFICATION:
Single submission: Restricted to switch submitted.
Group submission: See table V.
PART NUMBER: Consists of "M" prefix followed by specification sheet number; a dash (-); and a five-
letter code. The five-letter code identifies the configuration and pressure setting mode (code from table
I); high-pressure setting (coarse value code from table II) followed by fine value with applicable
tolerance (code from table III); and low-pressure setting (coarse value code from table II) followed by
fine value with applicable tolerance (code from table III). The five-letter code used in the following
example identifies a switch of configuration 1 which actuates on increasing pressure at 1.5 ±.5 psid,
and deactuates on decreasing pressure at .5 ±.5 psid.
EXAMPLE:
M9395/29-
A
AD
AB
"M" PREFIX AND SPECIFICATION SHEET NUMBER
CONFIGURATION AND PRESSURE SETTING MODE=
Code "A" of table I.
HIGH-PRESSURE SETTING = Code "A" of table II
(coarse value of 0 psid) and Code "D" of table III (fine
value of 1½ ±½ psid).
LOW-PRESSURE SETTING = Code "A" of table II
(coarse value of 0 psid) and Code "B" of table III (fine
value of .5 ±.5 psid).
NOTE: Design limitations (actuation values and tolerances, deadband and deactuation values and
tolerances) should be coordinated with manufacturer(s) listed on the QPL for this specification
sheet before specifying a particular "M" number. The fact that operating characteristics can
be coded does not necessarily mean that it can be manufactured or acquired.
TABLE I. Codes for combinations of configurations and pressure setting modes.
Configuration 1
Configuration 2
Configuration 3
Pressure setting mode
Electrical chamber Electrical chamber Electrical chamber
High
Low
Hermetic Unsealed Hermetic Unsealed Hermetic Unsealed
setting
setting
Code
A
D
G
K
N
R
At (or max) 1/ At (or min) 1/
Code
B
E
H
L
P
S
At (or max) 1/ Differential 2/
Code
C
F
J
M
Q
T
Differential 2/ At (or min) 1/
1/ Setting values are designated by codes from table II and III.
2/ Setting values are designated by codes from table IV.
5
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