The Bearing,ball,annular, cataloged under National Stock Number 3110-00-448-2237, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-448-2237 |
| Primary Part Number | SR1-4BC12V32C |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Internal Clearance | 0.0002 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Style Designator | SHOULDERED INNER RING, SEPARABLE |
| Overall Outside Diameter | 0.2499 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT |
| Contact Angle | 20.5 DEGREES NOMINAL |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO.7 |
| Bore Diameter | 0.0781 INCHES NOMINAL IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | STEEL COMP 440C BALL |
| Material | PAPER AND PLASTIC PHENOLIC RETAINER |
| Calibration Designator | C12 |
| 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 |
|---|---|
| SR1-4BC12V32C PRIMARY | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation (USA) |
| 930C789-3 PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| 930C789-3 | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation (USA) |
| 930C789-3 PRIMARY | New Hampshire Ball Bearings Inc Div Precision Division (USA) |
| Reference | Meaning |
|---|---|
| 930C789-3 | 7/2 Vendor item drawing reference U.S. Government activity |
| 930C789-3 | 5/9 Secondary reference Transquip Inc |
| 930C789P3 | 5/9 Secondary reference U.S. Government activity |
NSN 3110-00-448-2237 is a Bearing,ball,annular, manufactured by Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-448-2237 has 4 manufacturer part numbers on file: SR1-4BC12V32C (Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation), 930C789-3 (Mpb Corp Div Timken Super Precision), 930C789-3 (Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation), 930C789-3 (New Hampshire Ball Bearings Inc Div Precision Division).
Key specifications for SR1-4BC12V32C: Retainer Fabrication Method: MACHINED; Internal Clearance: 0.0002 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND; Style Designator: SHOULDERED INNER RING, SEPARABLE. 15 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.