The Bearing Unit,roller, cataloged under National Stock Number 3130-01-076-3298, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Rexnord Industries, Llc Div Aerosspace Bearing Operation. Government technical data includes 26 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3130-01-076-3298 |
| Primary Part Number | MBR2203 |
| Item Name | Bearing Unit,roller |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Rexnord Industries, Llc Div Aerosspace Bearing Operation |
| Status | ACTIVE |
| Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Lubrication Fitting Type | HYDRAULIC |
| Assembly Overall Length | 3.3750 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Mounting Hole Type | ROUND, UNTHREADED |
| Rotating Element Locking Method | SETSCREW LOCKING COLLAR |
| Seal Location | BOTH ENDS |
| Block Type | FIXED |
| Style Designator | FLANGE CARTRIDGE BLOCK |
| Mounting Hole Diameter | 0.5000 INCHES NOMINAL IN |
| Collar Location | ONE END |
| Features Provided | GROUND ROLLING ELEMENT GROOVE |
| Pilot Diameter | 4.9980 INCHES MINIMUM AND 5.0000 INCHES MAXIMUM IN |
| Alignment Type | SELF-ALIGNING |
| Rolling Element Groove Quantity | 2 |
| Bolt Circle Diameter | 6.0000 INCHES NOMINAL IN |
| Shaft End Type | OPEN |
| Bore Diameter | 2.1875 INCHES NOMINAL IN |
| Material | IRON MALLEABLE HOUSING |
| Material | RUBBER SEAL |
| Material | STEEL BEARING |
| Housing Length | 2.5625 INCHES NOMINAL IN |
| Housing Diameter | 7.1250 INCHES NOMINAL IN |
| Lubrication Fitting Angle From Horizontal Centerline | 90.0 DEGREES NOMINAL |
| Load Capability Type | RADIAL AND THRUST |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MBR2203 PRIMARY | Rexnord Industries, Llc Div Aerosspace Bearing Operation (USA) |
| Reference | Meaning |
|---|---|
| 8-52-204 | 5/9 Secondary reference Itw Heartland Components Inc |
| 8-52-204 | 5/9 Secondary reference Illinois Tool Wks Inc Linac Div |
| 8-52T07ITEM54 | 5/9 Secondary reference Illinois Tool Wks Inc Linac Div |
| MBR203 | 5/9 Secondary reference Rexnord Industries, Llc Div Aerosspace Bearing Operation |
NSN 3130-01-076-3298 is a Bearing Unit,roller, manufactured by Rexnord Industries, Llc Div Aerosspace Bearing Operation, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-076-3298 has 1 manufacturer part number on file: MBR2203 (Rexnord Industries, Llc Div Aerosspace Bearing Operation).
1 possible match (shared part number, not a government interchangeability claim): 6695-01-374-8058. Verify interchangeability with system specifications before substitution.
Key specifications for MBR2203: Seal Type: CONTACT; Lubrication Material: GREASE; Lubrication Fitting Type: HYDRAULIC; Assembly Overall Length: 3.3750 INCHES NOMINAL IN. 26 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.