NSN 3120-01-321-8778 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-321-8778. Manufacturer of record part number: 5544163-1.
Flange Outside Diameter: 0.9600 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
Body Outside Diameter: 0.6235 INCHES MINIMUM AND 0.6245 INCHES MAXIMUM IN
Style Designator: SOLID, EXTERNAL FLANGE ONE END
Material Document and Classification: MIL-B-5687,TYPE 1,GRADE 1&JDCMIL-B-5687,TYPE 1,GRADE 2 MIL SPEC 1ST MATERIAL RESPONSE OVERALL
Body Inside Diameter: 0.4395 INCHES MINIMUM AND 0.4405 INCHES MAXIMUM IN
Flange Width: 0.0600 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN
Identification
NSN: 3120-01-321-8778
NIIN: 013218778
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: 5544163-1
Manufacturer: Naval Sea Systems Command
General Description
The Bearing,sleeve, cataloged under National Stock Number 3120-01-321-8778, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3120-01-321-8778
Primary Part Number
5544163-1
Item Name
Bearing,sleeve
FSC / FSG
3120 / 31 — Bearings, Plain, Unmounted
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Corner Shape
SQUARE ALL CORNERS
Flange Outside Diameter
0.9600 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
Body Outside Diameter
0.6235 INCHES MINIMUM AND 0.6245 INCHES MAXIMUM IN
Style Designator
SOLID, EXTERNAL FLANGE ONE END
Material Document and Classification
MIL-B-5687,TYPE 1,GRADE 1&JDCMIL-B-5687,TYPE 1,GRADE 2 MIL SPEC 1ST MATERIAL RESPONSE OVERALL
Body Inside Diameter
0.4395 INCHES MINIMUM AND 0.4405 INCHES MAXIMUM IN
Flange Width
0.0600 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN
General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA)
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 3120-01-321-8778?
NSN 3120-01-321-8778 is a Bearing,sleeve, manufactured by Naval Sea Systems Command, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
What part numbers are listed for NSN 3120-01-321-8778?
NSN 3120-01-321-8778 has 2 manufacturer part numbers on file: 5544163-1 (Naval Sea Systems Command), 5544163-1 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
What are the specifications of 5544163-1?
Key specifications for 5544163-1: Corner Shape: SQUARE ALL CORNERS; Flange Outside Diameter: 0.9600 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN; Body Outside Diameter: 0.6235 INCHES MINIMUM AND 0.6245 INCHES MAXIMUM IN; Style Designator: SOLID, EXTERNAL FLANGE ONE END. 9 specifications are documented in the U.S. Government catalog.
Is NSN 3120-01-321-8778 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.