MIL-DTL-24402/5B(SH)
MOUNTING FLANGE CONFIGURATION. The differential pressure indicator mounting flange configuration
shall be designated by a suffix as follows:
No suffix
-
Standard 4-hole flange to mate with figure 1 gland of MIL-DTL-24402.
D
-
Dual-bolt circle, 8-hole flange to mate with figure 1 gland of MIL-DTL-24402 but also
containing four holes of 0.172±0.003-inch diameter equally spaced on a 1.069-inch
diameter bolt circle.
The D suffix is included in the part number to identify an indicator suitable for multiple mounting configurations for
logistic support.
PART NUMBER CROSS REFERENCE. Table I provides a cross reference between old (MIL-F-24402D and
earlier) and new part numbers.
TABLE I. Cross reference of part numbers.
New part numbers
Old part numbers
(Fatigue rated)
(Fatigue rated)
(Non-fatigue rated)
M24402/5-E90
M24402 Form E-3
M24402 Form E-0
M24402/5-E45
-
-
M24402/5-G150
M24402 Form G-3
M24402 Form G-0
M24402/5-M90
M24402 Form M-3
M24402 Form M-0
M24402/5-M45
-
-
SUBSTITUTION OF ASSEMBLIES. Indicators with new part numbers may be substituted for corresponding
indicators with old part numbers as shown in table I. Only indicators with old part numbers that are fatigue rated
may be substituted for indicators with new part numbers.
REQUIREMENTS.
a.
Configuration. The indicators shall comply with the envelope dimensions shown on figure 1.
(1) Male gland dimensions. The male gland shall comply with the dimensions shown on figure 2.
(2) Seals. The O-rings and backup ring specified on figure 2 shall be supplied already assembled onto the
indicator.
(3) Mounting fasteners. The mounting fasteners may be NAS 1351N4H*, where `* is the length of the
fastener in sixteenths of an inch. Length of the fastener shall be selected to provide a thread
engagement of between 1¼ and 1½ times the diameter of the fastener. Fastener torque values shall be
as specified (see 6.2 of MIL-DTL-24402).
b.
Maximum rated operating pressure. The indicators shall have a rated operating pressure of 3,000 lb/in².
c.
Surge lockout pressure. For mechanical and electrical indicators. The minimum surge lockout differential
pressure shall be 15 lb/in² greater than the nominal actuation differential pressure.
2
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