PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

CP1AAU3A12Altimeter,pressurized Compartmen

Aerosonic Llc · NSN 6685-00-226-5700 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-226-5700 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-226-5700. Primary manufacturer part number: CP1AAU3A12.
Features
  • Altimeter,pressurized Compartmen — FSC 6685
  • Nondefinitive Spec/std Data: AAU-3A/A TYPE A
  • Nonluminous Scale Marking and Color: LINED INCREMENTS WHITE
  • Nonluminous Scale Marking and Color: NUMERALS WHITE
  • Pointer Color: WHITE
  • Scale Quantity: 1
  • Nonluminous Scale Marking and Color: LETTERS WHITE
  • Electrical Connection Identifying Number: DM5600-3P OR EQUIVALENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Altimeter,pressurized Compartmen, cataloged under National Stock Number 6685-00-226-5700, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Aerosonic Llc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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
NSN6685-00-226-5700
Primary Part NumberCP1AAU3A12
Item NameAltimeter,pressurized Compartmen
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAerosonic Llc
StatusACTIVE
Nondefinitive Spec/std DataAAU-3A/A TYPE A
Nonluminous Scale Marking and ColorLINED INCREMENTS WHITE
Nonluminous Scale Marking and ColorNUMERALS WHITE
Pointer ColorWHITE
Scale Quantity1
Nonluminous Scale Marking and ColorLETTERS WHITE
Electrical Connection Identifying NumberDM5600-3P OR EQUIVALENT
Mechanical Connection Quantity1
Scale Smallest Increment Graduation1000 FEET FT
Overall Diameter2.180 INCHES NOMINAL IN
Mounting MethodTHREADED BEZEL
Scale NameCABIN PRESSURE ALTITUDE
Contact TypePIN
Mechanical Connection TypeINTERNAL UNF BOSS
Mechanical Connection Size7/16-20 UNF PER MS33649-4
Scale Marking TransparencyNONLUMINOUS
Scale MarkingLETTERS AND NUMERALS AND LINED INCREMENTS
Specification/standard Data81349-MIL-A-25933 GOVERNMENT SPECIFICATION AND 98810-24194 MANUFACTURERS SPECIFICATION
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
6685-00-725-9117 INTERCHANGEABLE
Altimeter,pressurized Compartmen
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
6685PL1489887 Jednolity Indeks Materialowy - Uniform Material Index (POL)
AAU-3A/A Joint Electronics Type Designation System (USA)
CP1AAU3A12 PRIMARY Aerosonic Llc (USA)
MIL-A-25933 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6685-00-078-0098INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
6685-00-148-9729INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
2109-2A
6685-00-725-9117INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
6685-00-853-3488INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
CP1AAU3A
6685-01-112-9094INTERCHANGEABLE
ALTIMETER,PRESSURIZED COMPARTMEN
2109-5

Frequently Asked Questions

What is NSN 6685-00-226-5700?

NSN 6685-00-226-5700 is a Altimeter,pressurized Compartmen, manufactured by Aerosonic Llc, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-226-5700?

NSN 6685-00-226-5700 has 4 cross-referenced part numbers: 6685PL1489887 (Jednolity Indeks Materialowy - Uniform Material Index), AAU-3A/A (Joint Electronics Type Designation System), CP1AAU3A12 (Aerosonic Llc), MIL-A-25933 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6685-00-226-5700?

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

What are the specifications of CP1AAU3A12?

Key specifications for CP1AAU3A12: Nondefinitive Spec/std Data: AAU-3A/A TYPE A; Nonluminous Scale Marking and Color: LINED INCREMENTS WHITE; Nonluminous Scale Marking and Color: NUMERALS WHITE; Pointer Color: WHITE. 23 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com