The Bearing,ball,airframe, cataloged under National Stock Number 3110-00-042-1045, 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 23 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3110-00-042-1045 |
| Primary Part Number | MS27643-4 |
| 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 | 0.4640 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE EXPOSED SURFACES AS MOUNTED |
| Style Designator | DOUBLE ROW, SELF ALIGNING |
| 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 |
| Overall Outside Diameter | 0.9014 INCHES NOMINAL IN |
| Load Direction | RADIAL |
| Alignment Type | SELF-ALIGNING |
| Surface Treatment | CADMIUM EXPOSED SURFACES AS MOUNTED |
| Seal Quantity | 2 |
| Standard Tolerance Designation | AFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS |
| Bore Diameter | 0.2500 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 |
| Self-Alignment Location | INTERNAL |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.6870 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 |
|---|---|
| 2910108 | Embraer Aviation International (FRA) |
| MS27643-4 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS27643-4 | 5/9 Secondary reference U.S. Government activity |
| DSP4FS464 | 5/9 Secondary reference Rbc Aircraft Products, Inc. |
| 10107322 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 2910108 | 5/9 Secondary reference Embraer Empresa Brasileira De Aeronautica Sa |
| AS27643 | 5/9 Secondary reference U.S. Government activity |
| MS20206-DSP4 | 5/9 Secondary reference U.S. Government activity |
| AN206DSP4 | C/1 Advisory reference — outside the item-of-supply concept Timken Co Div the Timken Company |
| AN206DSP4 | 5/9 Secondary reference U.S. Government activity |
| MS27643-4 | 5/9 Secondary reference U.S. Government activity |
| DSP4FS464 | 5/9 Secondary reference Timken Co Div the Timken Company |
| 2910108 | 5/9 Secondary reference Embraer S.a. |
| AS27643 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 3110-00-042-1045 is a Bearing,ball,airframe, manufactured by Sae International Dba Sae International, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-042-1045 has 2 manufacturer part numbers on file: 2910108 (Embraer Aviation International), MS27643-4 (Sae International Dba Sae International).
4 possible matches (shared part number, not a government interchangeability claim): 3110-00-042-3853, 3110-00-042-4262, 3110-00-042-4498. Verify interchangeability with system specifications before substitution.
Key specifications for MS27643-4: Bearing Seal Type: CONTACT; Outer Ring Width: 0.4640 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE EXPOSED SURFACES AS MOUNTED; Style Designator: DOUBLE ROW, SELF ALIGNING. 23 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.