NSN 3120-01-499-9971 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-499-9971. Manufacturer of record part number: 6338K437.
Flange Outside Diameter: 1.4950 INCHES MINIMUM AND 1.5050 INCHES MAXIMUM IN
Body Outside Diameter: 1.2500 INCHES NOMINAL IN
Style Designator: SOLID, EXTERNAL FLANGE ONE END
Material Document and Classification: SAE 30 ASSN STD SINGLE MATERIAL RESPONSE LUBRICATION
Body Inside Diameter: 0.5000 INCHES NOMINAL IN
Flange Width: 0.1250 INCHES NOMINAL IN
Identification
NSN: 3120-01-499-9971
NIIN: 014999971
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: 6338K437
Manufacturer: Mcmaster-Carr Supply Co
General Description
The Bearing,sleeve, cataloged under National Stock Number 3120-01-499-9971, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Mcmaster-Carr Supply Co. 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
3120-01-499-9971
Primary Part Number
6338K437
Item Name
Bearing,sleeve
FSC / FSG
3120 / 31 — Bearings, Plain, Unmounted
Manufacturer
Mcmaster-Carr Supply Co
Status
ACTIVE
Corner Shape
SQUARE ALL CORNERS
Flange Outside Diameter
1.4950 INCHES MINIMUM AND 1.5050 INCHES MAXIMUM IN
Body Outside Diameter
1.2500 INCHES NOMINAL IN
Style Designator
SOLID, EXTERNAL FLANGE ONE END
Material Document and Classification
SAE 30 ASSN STD SINGLE MATERIAL RESPONSE LUBRICATION
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 3120-01-499-9971?
NSN 3120-01-499-9971 is a Bearing,sleeve, manufactured by Mcmaster-Carr Supply Co, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
What part numbers are listed for NSN 3120-01-499-9971?
NSN 3120-01-499-9971 has 2 manufacturer part numbers on file: 10656738-2 (General Dynamics Land Systems Canadacorp), 6338K437 (Mcmaster-Carr Supply Co).
What are the specifications of 6338K437?
Key specifications for 6338K437: Corner Shape: SQUARE ALL CORNERS; Flange Outside Diameter: 1.4950 INCHES MINIMUM AND 1.5050 INCHES MAXIMUM IN; Body Outside Diameter: 1.2500 INCHES NOMINAL IN; Style Designator: SOLID, EXTERNAL FLANGE ONE END. 9 specifications are documented in the U.S. Government catalog.
Is NSN 3120-01-499-9971 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.