The Bearing,ball,annular, cataloged under National Stock Number 3110-01-271-1887, 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 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-271-1887 |
| Primary Part Number | 571-9405-01 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corp Div Timken Super Precision |
| Status | ACTIVE |
| Lubrication Material | OIL |
| Internal Clearance | 0.0003 INCHES MINIMUM AXIAL AND 0.0011 INCHES MAXIMUM AXIAL IN |
| Flange Outside Diameter | 0.5640 INCHES MINIMUM AND 0.5650 INCHES MAXIMUM IN |
| Surface Finish | GROUND |
| Shield Quantity | 2 |
| Bore Shape | STRAIGHT |
| Contact Angle | 16.5 DEGREES NOMINAL |
| Load Direction | ANGULAR |
| Flange Width | 0.0410 INCHES MINIMUM AND 0.0420 INCHES MAXIMUM IN |
| Outer Ring Outside Diameter | 0.4998 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 0.1873 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEPARATOR |
| Material | STEEL COMP E52100 BALL |
| Material | STEEL COMP E52100 OUTER RING |
| Material | STEEL COMP E52100 INNER RING |
| Material | STEEL COMP 302 SHIELD |
| Lubrication Material Document and Classification | NRL MB-20,CAGEC 25583 MFR REF 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 |
|---|---|
| 571-9405-01 PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| 571-9405-01 PRIMARY | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation (USA) |
| Reference | Meaning |
|---|---|
| FR3SSZAX55 | 5/1 Secondary reference Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation |
| 571-9405-01 | 3/2 Design control — primary reference U.S. Government activity |
| 571-9405-01 | 7/2 Vendor item drawing reference Acron Aviation, Inc. |
NSN 3110-01-271-1887 is a Bearing,ball,annular, manufactured by Mpb Corp Div Timken Super Precision, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-271-1887 has 2 manufacturer part numbers on file: 571-9405-01 (Mpb Corp Div Timken Super Precision), 571-9405-01 (Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation).
Key specifications for 571-9405-01: Lubrication Material: OIL; Internal Clearance: 0.0003 INCHES MINIMUM AXIAL AND 0.0011 INCHES MAXIMUM AXIAL IN; Flange Outside Diameter: 0.5640 INCHES MINIMUM AND 0.5650 INCHES MAXIMUM IN; Surface Finish: GROUND. 18 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.