The Bearing,ball,airframe, cataloged under National Stock Number 3110-00-033-9851, 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 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 17 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 3110-00-033-9851 |
| Primary Part Number | MS27641-5 |
| Item Name | Bearing,ball,airframe |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Bearing Seal Type | CONTACT |
| Outer Ring Width | 0.2340 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 | 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 |
| Overall Outside Diameter | 0.8125 INCHES NOMINAL IN |
| Load Direction | RADIAL |
| Surface Treatment | CADMIUM EXPOSED SURFACES AS MOUNTED |
| Seal Quantity | 2 |
| Standard Tolerance Designation | AFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS |
| Bore Diameter | 0.3125 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 | 0.2970 INCHES NOMINAL IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MS27641-5 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| 2910069 | Embraer Aviation International (FRA) |
| KP5A | Schatz Bearing Corporation Dba Schatz Bearing Corp (USA) |
| MS27641-5 PRIMARY | Sae International Dba Sae International (USA) |
| KP5AFS464 | Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings (USA) |
| 9408308603 | Pilatus Aircraft Ltd (CHE) |
| 2910069 | Embraer S.a. (BRA) |
| Reference | Meaning |
|---|---|
| SAE AS27641-5 | 5/9 Secondary reference U.S. Government activity |
| KP5A | 5/9 Secondary reference Skf Usa Inc. |
| 2910069 | 5/9 Secondary reference Embraer Empresa Brasileira De Aeronautica Sa |
| MS27641-5 | 5/9 Secondary reference U.S. Government activity |
| KP5AE+6531 | C/1 Advisory reference — outside the item-of-supply concept Timken Co Div the Timken Company |
| 538663-5 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3110000339851 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MS27641-5 | 5/9 Secondary reference U.S. Government activity |
| SAE AS27641 | 5/9 Secondary reference U.S. Government activity |
| 3110001424465 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MS27641KP5A | 5/2 Secondary reference U.S. Government activity |
| KP5A KP5A-FS464 | 5/9 Secondary reference Timken Co Div the Timken Company |
| KP5AFS464 | 5/9 Secondary reference Timken Co Div the Timken Company |
| MM27641-5 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| AS27641-5 | 5/9 Secondary reference U.S. Government activity |
| AS27641-5 | 3/1 Design control — primary reference Sae International Dba Sae International |
| SAE AS27641 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 3110-00-033-9851 is a Bearing,ball,airframe, manufactured by Sae International Dba Sae International, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: cancelled.
NSN 3110-00-033-9851 has 7 manufacturer part numbers on file: MS27641-5 (Leonardo Spa Helicopters Division - Production Site), 2910069 (Embraer Aviation International), KP5A (Schatz Bearing Corporation Dba Schatz Bearing Corp), MS27641-5 (Sae International Dba Sae International), KP5AFS464 (Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings) and 2 more.
4 possible matches (shared part number, not a government interchangeability claim): 3110-00-142-4464, 3110-00-960-7479, 3110-01-036-9831. Verify interchangeability with system specifications before substitution.
Key specifications for MS27641-5: Bearing Seal Type: CONTACT; Outer Ring Width: 0.2340 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: SINGLE ROW INNER RING EXTENDED BOTH SIDES. 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.
NSN 3110-00-033-9851 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.