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PartsTable / COMPONENT / A4448
A4448 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

CATAPULT,AIRCRAFT EJECTION SEAT. Key specifications include disk_material: NICKEL ALLOY, end_item_identification: USED ON 10733-26 INFLATION VALVE ASSY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-266-2432, 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
A4448
NSN: 3120-01-266-2432
FSC: 3120
CAGE: 20049 — THE ELECTRIC TACHOMETER CORP. (USA)
SPECIFICATIONS
disk_materialNICKEL ALLOY
end_item_identificationUSED ON 10733-26 INFLATION VALVE ASSY
NSN3120-01-266-2432
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: A4448 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
2478092Interchangeable
interchangeable cross-reference
interchangeable
1377-M314Interchangeable
interchangeable cross-reference
interchangeable
10006-5Interchangeable
interchangeable cross-reference
interchangeable
32N802PC15Interchangeable
interchangeable cross-reference
interchangeable
BBS312Interchangeable
interchangeable cross-reference
interchangeable
K8468646Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A4448?
A4448 is a CATAPULT,AIRCRAFT EJECTION SEAT.
What parts can replace A4448?
There are 9 known substitutes for A4448: 2478092, 1377-M314, 10006-5 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A4448?
A4448 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-266-2432. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026