The Bearing,ball,annular, cataloged under National Stock Number 3110-01-438-2979, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Pyser Sgi Limited. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-438-2979 |
| Primary Part Number | 401477 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Pyser Sgi Limited |
| Status | ACTIVE |
| Flange Outside Diameter | 0.5470 INCHES NOMINAL IN |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Flange Width | 0.0310 INCHES NOMINAL IN |
| Outer Ring Outside Diameter | 0.5000 INCHES MAXIMUM IN |
| Bore Diameter | 0.3125 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 401477 | Pyser Sgi Limited (GBR) |
| Reference | Meaning |
|---|---|
| SFR18103P-P | 3/2 Design control — primary reference U.S. Government activity |
NSN 3110-01-438-2979 is a Bearing,ball,annular, manufactured by Pyser Sgi Limited, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-438-2979 has 1 manufacturer part number on file: 401477 (Pyser Sgi Limited).
Key specifications for 401477: Flange Outside Diameter: 0.5470 INCHES NOMINAL IN; Style Designator: NON-LOADING GROOVE, NON-SEPARABLE; Overall Width: 0.1562 INCHES MAXIMUM IN; Flange Width: 0.0310 INCHES NOMINAL IN. 5 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.