The Bearing,ball,airframe, cataloged under National Stock Number 3110-00-227-4589, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 15 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through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3110-00-227-4589 |
| Primary Part Number | MS21443-8 |
| Item Name | Bearing,ball,airframe |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Outer Ring Width | 0.5625 INCHES NOMINAL IN |
| Style Designator | SINGLE ROW INNER RING EXTENDED BOTH SIDES |
| Overall Outside Diameter | 1.6875 INCHES NOMINAL IN |
| Load Direction | RADIAL |
| Surface Treatment | CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES |
| Seal Quantity | 2 |
| Bore Diameter | 0.5000 INCHES NOMINAL IN |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | RUBBER SYNTHETIC SEAL |
| Material | STEEL BALL |
| Lubrication Material Document and Classification | MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.7500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MS21443-8 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS21443 | 5/9 Secondary reference U.S. Government activity |
| AS21443 | 5/9 Secondary reference U.S. Government activity |
| P8FS160A | 5/9 Secondary reference Rbc Aircraft Products, Inc. |
| P8FS160A | 5/9 Secondary reference Timken Co Div the Timken Company |
| MS21443-8G | 5/9 Secondary reference U.S. Government activity |
| P8MILG3278A | 5/9 Secondary reference Timken Co Div the Timken Company |
| AS21443 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS7949 | 5/9 Secondary reference U.S. Government activity |
| MS21443-8 | 5/9 Secondary reference U.S. Government activity |
| P8FS160 | 5/9 Secondary reference Rbc Aircraft Products, Inc. |
| P8FS160 | 5/9 Secondary reference Timken Co Div the Timken Company |
| P8 | 5/9 Secondary reference Timken Co Div the Timken Company |
| AS7949 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 3110-00-227-4589 is a Bearing,ball,airframe, manufactured by Sae International Dba Sae International, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-227-4589 has 1 manufacturer part number on file: MS21443-8 (Sae International Dba Sae International).
2 possible matches (shared part number, not a government interchangeability claim): 3110-00-277-0056, 3110-00-294-3948. Verify interchangeability with system specifications before substitution.
Key specifications for MS21443-8: Bearing Seal Type: CONTACT; Lubrication Material: GREASE; Outer Ring Width: 0.5625 INCHES NOMINAL IN; Style Designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES. 15 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.
NSN 3110-00-227-4589 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.