NSN 3120-01-481-9378 · NIIN 014819378 · Part number ST4M166-4-0135
The Boeing Company Div Defense · FSC 3120 — Bearings, Plain, Unmounted · FSG 31 — Bearings · CAGE 76301
Government record, cited
NSN 3120-01-481-9378 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-481-9378. Manufacturer of record part number: ST4M166-4-0135.
Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES, INTERNAL FLANGE AT BOTH ENDS
Body Inside Diameter: 0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
Material: STEEL CORROSION RESISTING OVERALL
1 manufacturer part number on file
Manufacturer of record: The Boeing Company Div Defense
Identification
NSN: 3120-01-481-9378
NIIN: 014819378
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: ST4M166-4-0135
Manufacturer: The Boeing Company Div Defense
General Description
The Bushing,sleeve, cataloged under National Stock Number 3120-01-481-9378, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 5 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
3120-01-481-9378
Primary Part Number
ST4M166-4-0135
Item Name
Bushing,sleeve
FSC / FSG
3120 / 31 — Bearings, Plain, Unmounted
Manufacturer
The Boeing Company Div Defense
Status
ACTIVE
Corner Shape
UNDERCUT ALL CORNERS
Body Outside Diameter
0.3740 INCHES NOMINAL IN
Style Designator
SOLID, PLAIN, NO OUTSIDE FLANGES, INTERNAL FLANGE AT BOTH ENDS
Body Inside Diameter
0.2500 INCHES MINIMUM AND 0.2510 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 3120-01-481-9378?
NSN 3120-01-481-9378 is a Bushing,sleeve, manufactured by The Boeing Company Div Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
What part numbers are listed for NSN 3120-01-481-9378?
NSN 3120-01-481-9378 has 1 manufacturer part number on file: ST4M166-4-0135 (The Boeing Company Div Defense).
What are the specifications of ST4M166-4-0135?
Key specifications for ST4M166-4-0135: Corner Shape: UNDERCUT ALL CORNERS; Body Outside Diameter: 0.3740 INCHES NOMINAL IN; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES, INTERNAL FLANGE AT BOTH ENDS; Overall Length: 0.8480 INCHES MINIMUM AND 0.8530 INCHES MAXIMUM IN. 5 specifications are documented in the U.S. Government catalog.
Is NSN 3120-01-481-9378 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.