PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AAU3AAAltimeter,pressurized Compartmen

Aeronautical and Aeronautical Support Equipment Type Designation System/mil Std 875/ · NSN 6685-00-078-0098 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-078-0098 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-078-0098. Primary manufacturer part number: AAU3AA.
Features
  • Altimeter,pressurized Compartmen — FSC 6685
  • Connector Controlling Agency: DEUTSCH
  • Nonluminous Scale Marking and Color: NUMERALS WHITE
  • Scale Quantity: 1
  • Electrical Connection Quantity: 1
  • Mechanical Connection Size: 1/4/0.250/ IN.
  • Mechanical Connection Quantity: 1
  • Nonluminous Scale Marking and Color: LETTERS WHITE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Altimeter,pressurized Compartmen, cataloged under National Stock Number 6685-00-078-0098, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Aeronautical and Aeronautical Support Equipment Type Designation System/mil Std 875/. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-078-0098
Primary Part NumberAAU3AA
Item NameAltimeter,pressurized Compartmen
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAeronautical and Aeronautical Support Equipment Type Designation System/mil Std 875/
StatusACTIVE
Connector Controlling AgencyDEUTSCH
Nonluminous Scale Marking and ColorNUMERALS WHITE
Scale Quantity1
Electrical Connection Quantity1
Mechanical Connection Size1/4/0.250/ IN.
Mechanical Connection Quantity1
Nonluminous Scale Marking and ColorLETTERS WHITE
Electrical Connection Identifying NumberDM5605-3P
Nonluminous Scale Marking and ColorLINED INCREMENTS WHITE
Contact Quantity3
Pointer ColorWHITE
Pointer Quantity1
Mechanical Connection TypeINTERNAL TUBE
Nondefinitive Spec/std DataAAU3AA TYPE
Scale NameALTITUDE
Mounting MethodPANEL
Scale Smallest Increment Graduation1000 FT FT
Contact TypePIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
6685-00-148-97292109-2A INTERCHANGEABLE
Altimeter,pressurized Compartmen
Kearflex Engineering Company
6685-00-226-5700CP1AAU3A12 INTERCHANGEABLE
Altimeter,pressurized Compartmen
Aerosonic Llc
6685-00-725-9117 INTERCHANGEABLE
Altimeter,pressurized Compartmen
6685-01-112-90942109-5 INTERCHANGEABLE
Altimeter,pressurized Compartmen
Kearflex Engineering Company
Cross-Reference Index
Part NumberManufacturer
AAU3AA Aeronautical and Aeronautical Support Equipment Type Designation System/mil Std 875/
MILA25933A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
2109 Kearflex Engineering Company (USA)
Related Parts
6685-00-148-9729INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
2109-2A
6685-00-226-5700INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
CP1AAU3A12
6685-00-725-9117INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
6685-01-112-9094INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
2109-5

Frequently Asked Questions

What is NSN 6685-00-078-0098?

NSN 6685-00-078-0098 is a Altimeter,pressurized Compartmen, manufactured by Aeronautical and Aeronautical Support Equipment Type Designation System/mil Std 875/, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-078-0098?

NSN 6685-00-078-0098 has 3 cross-referenced part numbers: AAU3AA (Aeronautical and Aeronautical Support Equipment Type Designation System/mil Std 875/), MILA25933A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 2109 (Kearflex Engineering Company).

What NSN replaces 6685-00-078-0098?

There are 4 known substitutes for 6685-00-078-0098: 6685-00-148-9729, 6685-00-226-5700, 6685-00-725-9117 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AAU3AA?

Key specifications for AAU3AA: Connector Controlling Agency: DEUTSCH; Overall Depth: 2.375 INCHES NOMINAL IN; Nonluminous Scale Marking and Color: NUMERALS WHITE; Scale Quantity: 1. 21 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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