NSN 3120-01-129-3449 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-129-3449. Manufacturer of record part number: MBEU-65523.
Body Inside Diameter: 2.1370 INCHES MINIMUM AND 2.1410 INCHES MAXIMUM IN
Flange Width: 0.0620 INCHES NOMINAL IN
1 manufacturer part number on file
Manufacturer of record: Martin-Baker Aircraft Company Limited
Identification
NSN: 3120-01-129-3449
NIIN: 011293449
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: MBEU-65523
Manufacturer: Martin-Baker Aircraft Company Limited
General Description
The Bushing,sleeve, cataloged under National Stock Number 3120-01-129-3449, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3120-01-129-3449
Primary Part Number
MBEU-65523
Item Name
Bushing,sleeve
FSC / FSG
3120 / 31 — Bearings, Plain, Unmounted
Manufacturer
Martin-Baker Aircraft Company Limited
Status
ACTIVE
Flange Outside Diameter
2.3700 INCHES NOMINAL IN
Body Outside Diameter
2.2400 INCHES NOMINAL IN
Body Inside Diameter
2.1370 INCHES MINIMUM AND 2.1410 INCHES MAXIMUM IN
Other items in FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288
3120-00-001-1288 · Item name not on file
3120-00-001-1835
3120-00-001-1835 · Item name not on file
3120-00-001-1838
3120-00-001-1838 · Item name not on file
3120-00-001-1928
3120-00-001-1928 · Item name not on file
3120-00-001-1934
3120-00-001-1934 · Item name not on file
3120-00-001-3933
3120-00-001-3933 · Item name not on file
3120-00-001-3937
3120-00-001-3937 · Item name not on file
3120-00-001-3938
3120-00-001-3938 · Item name not on file
Frequently Asked Questions
What is NSN 3120-01-129-3449?
NSN 3120-01-129-3449 is a Bushing,sleeve, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
What part numbers are listed for NSN 3120-01-129-3449?
NSN 3120-01-129-3449 has 1 manufacturer part number on file: MBEU-65523 (Martin-Baker Aircraft Company Limited).
What are the specifications of MBEU-65523?
Key specifications for MBEU-65523: Flange Outside Diameter: 2.3700 INCHES NOMINAL IN; Body Outside Diameter: 2.2400 INCHES NOMINAL IN; Overall Length: 1.2500 INCHES NOMINAL IN; Body Inside Diameter: 2.1370 INCHES MINIMUM AND 2.1410 INCHES MAXIMUM IN. 4 specifications are documented in the U.S. Government catalog.
Is NSN 3120-01-129-3449 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.