The Bearing,ball,airframe, cataloged under National Stock Number 3110-00-042-0446, 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 21 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government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 | 3110-00-042-0446 |
| Primary Part Number | MS27642-25 |
| Item Name | Bearing,ball,airframe |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Outer Ring Width | 0.3750 INCHES NOMINAL IN |
| Style Designator | SINGLE ROW INNER RING EXTENDED BOTH SIDES |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES BALL |
| Material Document and Classification | AMS 3652 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 3666 ASSN STD SINGLE MATERIAL RESPONSE SEAL |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE INNER RING |
| Material Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE MATERIAL RESPONSE ALL EXTERNAL/EXPOSED METAL SURFACES |
| Overall Outside Diameter | 2.3125 INCHES NOMINAL IN |
| Load Direction | RADIAL |
| Surface Treatment | CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES |
| Seal Quantity | 2 |
| Standard Tolerance Designation | AFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS |
| Bore Diameter | 1.5630 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAL |
| Material | STEEL CORROSION RESISTING RETAINER |
| Material | STEEL COMP E52100 OUTER RING |
| Material | STEEL COMP E51100 OR STEEL COMP E52100 BALL |
| Material | STEEL COMP E52100 INNER RING |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.4370 INCHES NOMINAL IN |
| 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 |
|---|---|
| KP25BFS464 | Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings (USA) |
| 9408308404 | Pilatus Aircraft Ltd (CHE) |
| MS27642-25 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| KP25B | 5/9 Secondary reference Skf Usa Inc. |
| AS7949 | 5/9 Secondary reference U.S. Government activity |
| KP25BFS464 | 5/9 Secondary reference Timken Co Div the Timken Company |
| MS27642-25 | 5/9 Secondary reference U.S. Government activity |
| AS7949 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS27642-25 | 5/9 Secondary reference U.S. Government activity |
| AS27642 | 5/1 Secondary reference Sae International Dba Sae International |
| 10107319 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AS27642 | 5/9 Secondary reference U.S. Government activity |
NSN 3110-00-042-0446 is a Bearing,ball,airframe, manufactured by Sae International Dba Sae International, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-042-0446 has 3 manufacturer part numbers on file: KP25BFS464 (Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings), 9408308404 (Pilatus Aircraft Ltd), MS27642-25 (Sae International Dba Sae International).
10 possible matches (shared part number, not a government interchangeability claim): 3110-00-042-0901, 3110-00-042-0916, 3110-00-042-0929. Verify interchangeability with system specifications before substitution.
Key specifications for MS27642-25: Bearing Seal Type: CONTACT; Outer Ring Width: 0.3750 INCHES NOMINAL IN; Style Designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES BALL. 21 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.