The Bearing,ball,annular, cataloged under National Stock Number 3110-01-072-7912, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Mpb Corp Div Timken Super Precision. Government technical data includes 22 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-072-7912 |
| Primary Part Number | 571-9440-51 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corp Div Timken Super Precision |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Lubrication Material | OIL |
| Internal Clearance | 0.0005 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Shield Quantity | 2 |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE RETAINER |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BALL |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE INNER RING |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE SNAP RING |
| Overall Outside Diameter | 0.1562 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 0.0469 INCHES NOMINAL IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | STEEL COMP 440C BALL |
| Material | STEEL COMP 410 RETAINER |
| Material | STEEL COMP 410 SNAP RING |
| Lubrication Material Document and Classification | MIL-L-81846 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 |
|---|---|
| 571-9440-51 | Acron Aviation, Inc. (USA) |
| 571-9440-51 PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| 571-9440-51 PRIMARY | New Hampshire Ball Bearings Inc Div Precision Division (USA) |
| Reference | Meaning |
|---|---|
| 10107447 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| SSRI-21/2ZZHA5P58LY208BC | 5/1 Secondary reference New Hampshire Ball Bearings Inc Div Precision Division |
| SR05PP | 5/9 Secondary reference U.S. Government activity |
| S2.5CHH5P58LY286EPS179 | 5/1 Secondary reference Mpb Corp Div Timken Super Precision |
| SSRI-21/2ZZHA5P58LY208BC | 5/9 Secondary reference U.S. Government activity |
NSN 3110-01-072-7912 is a Bearing,ball,annular, manufactured by Mpb Corp Div Timken Super Precision, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-072-7912 has 3 manufacturer part numbers on file: 571-9440-51 (Acron Aviation, Inc.), 571-9440-51 (Mpb Corp Div Timken Super Precision), 571-9440-51 (New Hampshire Ball Bearings Inc Div Precision Division).
Key specifications for 571-9440-51: Retainer Fabrication Method: PRESSED; Lubrication Material: OIL; Internal Clearance: 0.0005 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND. 22 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.