PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILA25933Altimeter,pressurized Compartmen

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6685-00-725-9117 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-725-9117 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-725-9117. Primary manufacturer part number: MILA25933.
Features
  • Altimeter,pressurized Compartmen — FSC 6685
  • Nonluminous Scale Marking and Color: LETTERS WHITE
  • Scale Smallest Increment Graduation: 1000 FEET FT
  • Scale Marking: LETTERS AND NUMERALS AND LINED INCREMENTS
  • Scale Name: CABIN PRESSURE ALTITUDE
  • Nondefinitive Spec/std Data: AAU-3A/A TYPE A
  • Specification/standard Data: 81349-MIL-A-25933 GOVERNMENT SPECIFICATION AND 98810-24194 MANUFACTURERS SPECIFICATION
  • Scale Marking Transparency: NONLUMINOUS
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Altimeter,pressurized Compartmen, cataloged under National Stock Number 6685-00-725-9117, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-725-9117
Primary Part NumberMILA25933
Item NameAltimeter,pressurized Compartmen
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Nonluminous Scale Marking and ColorLETTERS WHITE
Scale Smallest Increment Graduation1000 FEET FT
Scale MarkingLETTERS AND NUMERALS AND LINED INCREMENTS
Scale NameCABIN PRESSURE ALTITUDE
Nondefinitive Spec/std DataAAU-3A/A TYPE A
Specification/standard Data81349-MIL-A-25933 GOVERNMENT SPECIFICATION AND 98810-24194 MANUFACTURERS SPECIFICATION
Scale Marking TransparencyNONLUMINOUS
Nonluminous Scale Marking and ColorNUMERALS WHITE
Nonluminous Scale Marking and ColorLINED INCREMENTS WHITE
Mechanical Connection TypeINTERNAL UNF BOSS
Mechanical Connection Quantity1
Contact TypePIN
Pointer ColorWHITE
Mounting MethodTHREADED BEZEL
Electrical Connection Identifying NumberDM5600-3P OR EQUIVALENT
Mechanical Connection Size7/16-20 UNF PER MS33649-4
Overall Diameter2.180 INCHES NOMINAL IN
Scale Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6685-00-078-0098 INTERCHANGEABLE
Altimeter,pressurized Compartmen
6685-00-148-97292109-2A INTERCHANGEABLE
Altimeter,pressurized Compartmen
Kearflex Engineering Company
6685-00-226-5700CP1AAU3A12 INTERCHANGEABLE
Altimeter,pressurized Compartmen
Aerosonic Llc
6685-00-853-3488CP1AAU3A INTERCHANGEABLE
Altimeter,pressurized Compartmen
Aerosonic Llc
6685-01-112-90942109-5 INTERCHANGEABLE
Altimeter,pressurized Compartmen
Kearflex Engineering Company
Cross-Reference Index
Part NumberManufacturer
MILA25933 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AAU3AA Joint Electronics Type Designation System (USA)
Related Parts
6685-00-078-0098INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
6685-00-148-9729INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
2109-2A
6685-00-226-5700INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
CP1AAU3A12
6685-00-853-3488INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
CP1AAU3A
6685-01-112-9094INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
2109-5

Frequently Asked Questions

What is NSN 6685-00-725-9117?

NSN 6685-00-725-9117 is a Altimeter,pressurized Compartmen, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-725-9117?

NSN 6685-00-725-9117 has 2 cross-referenced part numbers: MILA25933 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AAU3AA (Joint Electronics Type Designation System).

What NSN replaces 6685-00-725-9117?

There are 5 known substitutes for 6685-00-725-9117: 6685-00-078-0098, 6685-00-148-9729, 6685-00-226-5700 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILA25933?

Key specifications for MILA25933: Nonluminous Scale Marking and Color: LETTERS WHITE; Scale Smallest Increment Graduation: 1000 FEET FT; Scale Marking: LETTERS AND NUMERALS AND LINED INCREMENTS; Overall Depth: 1.750 INCHES NOMINAL IN. 23 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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