The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-172-3345, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-172-3345 |
| Primary Part Number | SB1143-101 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Internal Clearance | 0.0012 INCHES MINIMUM RADIAL AND 0.0020 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, UNIVERSAL GROUND FACES |
| Overall Outside Diameter | 3.1492 INCHES MINIMUM AND 3.1496 INCHES MAXIMUM IN |
| Load Direction | RADIAL |
| Standard Tolerance Designation | AFBMA CLASS 3 |
| Bore Diameter | 1.9682 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | STEEL RETAINER |
| Material | GREASE LUBRICATION |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAL |
| Material | STEEL COMP 440C BALL |
| Material | STEEL CORROSION RESISTING SNAP RING |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| SB1143 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| SB1143-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| AM9110PVMDBA2980 | 5/9 Secondary reference Timken Co Div the Timken Company |
| AM9110PVM-104 | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3110-01-172-3345 is a Bearing,ball,duplex, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-172-3345 has 2 manufacturer part numbers on file: SB1143 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), SB1143-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for SB1143-101: Retainer Fabrication Method: PRESSED; Internal Clearance: 0.0012 INCHES MINIMUM RADIAL AND 0.0020 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND; Style Designator: COUNTERBORED OUTER RINGS, NON-SEPARABLE, UNIVERSAL GROUND FACES. 16 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.