The Bearing,ball,annular, cataloged under National Stock Number 3110-00-227-3161, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Mpb Corp Div Timken Super Precision. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-227-3161 |
| Primary Part Number | 4FC |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corp Div Timken Super Precision |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Internal Fit-Up Designation | STANDARD |
| Flange Outside Diameter | 0.2969 INCHES NOMINAL IN |
| Surface Finish | GROUND |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Flange Width | 0.0230 INCHES NOMINAL IN |
| Outer Ring Outside Diameter | 0.2500 INCHES NOMINAL IN |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 0.0781 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 4FC PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| 304791-3 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| 1148982-3 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| C240197-4 PRIMARY | Raytheon Company Dba Raytheon Co (USA) |
| 941130-55 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| MFR4 | 5/9 Secondary reference U.S. Government activity |
| FR1-4 | 3/2 Design control — primary reference U.S. Government activity |
| FR1-4A | 3/2 Design control — primary reference U.S. Government activity |
| 24859 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3110-00-227-3161 is a Bearing,ball,annular, manufactured by Mpb Corp Div Timken Super Precision, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-227-3161 has 5 manufacturer part numbers on file: 4FC (Mpb Corp Div Timken Super Precision), 304791-3 (Lockheed Martin Librascope Corporation), 1148982-3 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), C240197-4 (Raytheon Company Dba Raytheon Co), 941130-55 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
5 possible matches (shared part number, not a government interchangeability claim): 5940-00-552-8955, 3655-00-612-8665, 5935-01-103-5834. Verify interchangeability with system specifications before substitution.
Key specifications for 4FC: Retainer Fabrication Method: PRESSED; Internal Fit-Up Designation: STANDARD; Flange Outside Diameter: 0.2969 INCHES NOMINAL IN; Surface Finish: GROUND. 12 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.