The Ring,backup,air Fil, cataloged under National Stock Number 4310-00-678-6744, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ring,backup,air Fil |
| FSC / FSG | 4310 — Compressors and Vacuum Pumps (FSG 43) |
| Parameter | Value |
|---|---|
| NSN | 4310-00-678-6744 |
| Item Name | Ring,backup,air Fil |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Reference | Meaning |
|---|---|
| A565964 | 5/9 Secondary reference Bendix Corp the |
| A565964 | 5/9 Secondary reference Drs Environmental Systems Inc |
| A565964 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
| 565964 | 3/2 Design control — primary reference U.S. Government activity |
| A565964 | 5/2 Secondary reference U.S. Government activity |
NSN 4310-00-678-6744 is a Ring,backup,air Fil, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2840-01-436-3438. Verify interchangeability with system specifications before substitution.
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.