The Bearing,ball,annular, cataloged under National Stock Number 3110-01-351-5643, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Skf Usa Inc.. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-351-5643 |
| Primary Part Number | MRC1903SZZ |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Skf Usa Inc. |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Surface Finish | GROUND |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Material Document and Classification | AMS 5514 ASSN STD SINGLE MATERIAL RESPONSE RETAINER |
| Overall Outside Diameter | 1.1807 INCHES MINIMUM AND 1.1811 INCHES MAXIMUM IN |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Seal Quantity | 2 |
| Standard Tolerance Designation | ABEC NO.1 |
| Bore Diameter | 0.6690 INCHES MINIMUM AND 0.6693 INCHES MAXIMUM IN |
| Material | STEEL INNER RACE |
| Material | STEEL COMP 305 RETAINER |
| Material | STEEL OUTER RACE |
| Material | STEEL BALL |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| MRC1903SZZ PRIMARY | Skf Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| 5906943 | 1/2 Source control — Government-approved source U.S. Government activity |
| SSR-1903004R6A1P410LY48UB | 3/2 Design control — primary reference U.S. Government activity |
NSN 3110-01-351-5643 is a Bearing,ball,annular, manufactured by Skf Usa Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-351-5643 has 1 manufacturer part number on file: MRC1903SZZ (Skf Usa Inc.).
Key specifications for MRC1903SZZ: Bearing Seal Type: CONTACT; Lubrication Material: GREASE; Surface Finish: GROUND; Style Designator: NON-LOADING GROOVE, NON-SEPARABLE. 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.