NSN 3120-01-366-3187 · NIIN 013663187 · Part number 4M256D6A2
The Boeing Company Div Defense · FSC 3120 — Bearings, Plain, Unmounted · FSG 31 — Bearings · CAGE 76301
Government record, cited
NSN 3120-01-366-3187 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-366-3187. Manufacturer of record part number: 4M256D6A2.
Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Flange Outside Diameter: 0.5900 INCHES NOMINAL IN
Body Outside Diameter: 0.4125 INCHES MINIMUM AND 0.4140 INCHES MAXIMUM IN
Style Designator: SOLID, EXTERNAL FLANGE ONE END
Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter: 0.3965 INCHES MINIMUM AND 0.3980 INCHES MAXIMUM IN
Identification
NSN: 3120-01-366-3187
NIIN: 013663187
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: 4M256D6A2
Manufacturer: The Boeing Company Div Defense
General Description
The Bushing,sleeve, cataloged under National Stock Number 3120-01-366-3187, 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 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3120-01-366-3187
Primary Part Number
4M256D6A2
Item Name
Bushing,sleeve
FSC / FSG
3120 / 31 — Bearings, Plain, Unmounted
Manufacturer
The Boeing Company Div Defense
Status
ACTIVE
Corner Shape
SQUARE ALL CORNERS
Surface Treatment Document and Classification
QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Flange Outside Diameter
0.5900 INCHES NOMINAL IN
Body Outside Diameter
0.4125 INCHES MINIMUM AND 0.4140 INCHES MAXIMUM IN
Style Designator
SOLID, EXTERNAL FLANGE ONE END
Material Document and Classification
AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter
0.3965 INCHES MINIMUM AND 0.3980 INCHES MAXIMUM IN
Surface Treatment
PASSIVATE OVERALL
Flange Width
0.0050 INCHES MINIMUM AND 0.0100 INCHES MAXIMUM IN
C/1Advisory reference — outside the item-of-supply concept
Jo King Inc Div J.o. King, Incorporated
No interchangeability data on file.
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 3120-01-366-3187?
NSN 3120-01-366-3187 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 3120-01-366-3187?
NSN 3120-01-366-3187 has 2 manufacturer part numbers on file: 4M256D6A2 (Huck International, Inc), 4M256D6A2 (The Boeing Company Div Defense).
What are the specifications of 4M256D6A2?
Key specifications for 4M256D6A2: Corner Shape: SQUARE ALL CORNERS; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Flange Outside Diameter: 0.5900 INCHES NOMINAL IN; Body Outside Diameter: 0.4125 INCHES MINIMUM AND 0.4140 INCHES MAXIMUM IN. 10 specifications are documented in the U.S. Government catalog.
Is NSN 3120-01-366-3187 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.