PartsTable
Technical Data Sheet

AAU-21/A — ALTIMETER,PRESSURE

✓ Government record, cited
AERONAUTICAL AND AERONAUTICAL SUPPORT EQUIPMENT TYPE DESIGNATION SYSTEM/MIL STD 875/ · COMPONENT
PRODUCT OVERVIEW

AAU-21/A: ALTIMETER,PRESSURE.

The ALTIMETER,PRESSURE is a AERONAUTICAL AND AERONAUTICAL SUPPORT EQUIPMENT TYPE DESIGNATION SYSTEM/MIL STD 875/ industrial component. Key specifications include END ITEM IDENTIFICATION: AIMS. This part is cataloged in the U.S.

Government catalog under NSN 6610-00-070-3374, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
AAU-21/A
NSN: 6610-00-070-3374
NIINs: 000703374, 001680797, 004056461
FSC: 6610 — Flight Instruments
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
END ITEM IDENTIFICATIONAIMS
NSN6610-00-070-3374
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: AERONAUTICAL AND AERONAUTICAL SUPPORT EQUIPMENT TYPE DESIGNATION SYSTEM/MIL STD 875/ ALTIMETER,PRESSURE TITLE COMPONENT PN AAU-21/A MFR AERONAUTICAL AND AERONAUTICAL SUPPORT EQUIPMENT TYPE DESIGNATION SYSTEM/MIL STD 875/ ALTIMETER,PRESSURE
KEY FEATURES
•
SCALE QUANTITY: 1
•
CONTACT TYPE: PIN
•
SCALE MARKING: LINED INCREMENTS
•
MECHANICAL CONNECTION QUANTITY: 1
•
SCALE NAME: ALTITUDE
•
ELECTRICAL CONNECTION QUANTITY: 1
•
KNOB PURPOSE: SETTING BAROMETRIC SCALE
TECHNICAL CHARACTERISTICS
SCALE QUANTITY1
OVERALL HEIGHT3.250 INCHES NOMINAL IN
CONTACT TYPEPIN
SCALE MARKINGLINED INCREMENTS
MECHANICAL CONNECTION QUANTITY1
SCALE NAMEALTITUDE
ELECTRICAL CONNECTION QUANTITY1
KNOB PURPOSESETTING BAROMETRIC SCALE
MOUNTING METHODTHREADED BEZEL
REFERENCE DATA AND LITERATURE5F3-3-16-3 AND MIL-A-81403
SUBSTITUTES & CROSS-REFERENCES 3
AF AVIONICS S/P ILReference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-I-81403Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AIMS66-122Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AAU-21/A?
AAU-21/A is a ALTIMETER,PRESSURE manufactured by AERONAUTICAL AND AERONAUTICAL SUPPORT EQUIPMENT TYPE DESIGNATION SYSTEM/MIL STD 875/.
What parts can replace AAU-21/A?
There are 3 known substitutes for AAU-21/A: AF AVIONICS S/P IL, MIL-I-81403, AIMS66-122. Substitute compatibility should be verified for your specific system.
What is the NSN for AAU-21/A?
AAU-21/A is cataloged in the U.S. Government catalog under NSN 6610-00-070-3374. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.