The Plug,seat Rtng, cataloged under National Stock Number 4820-01-549-4245, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 16 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-549-4245 |
| Item Name | Plug,seat Rtng |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROLLED IAW NAVY LEVEL1 ASSURANCE GUIDE, CLEANED IAW MIL-C- 52211 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 264277305-3C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| G547-0002-264277305-3C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 845-4687579 ITEM 3 | 5/1 Secondary reference U.S. Government activity |
| 7550478-264277305-3C1 | 3/1 Design control — primary reference Naval Inventory Control Point Mechanicsburg |
| 845-4558736 ITEM 7C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 845-4687579 ITEM 3C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 264277305-3 | 5/1 Secondary reference U.S. Government activity |
| 4558736-0007 | 5/1 Secondary reference U.S. Government activity |
| 2642-773-05 ITEM 3 | 5/1 Secondary reference U.S. Government activity |
| 2642-773-02 ITEM 7 | 5/1 Secondary reference U.S. Government activity |
| 4558736-0007C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2642-773-05 ITEM 3C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2642-773-02 ITEM 7C1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| G547-0002-264277305-3 | 5/1 Secondary reference U.S. Government activity |
| 7550478-264277305-3 | 5/1 Secondary reference Naval Sea Systems Command |
| 845-4558736 ITEM 7 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-549-4245 is a Plug,seat Rtng, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-549-4245: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: PLUG BV SEAT RTNG; Reference Number Differentiating Characteristics: QUALITY CONTROLLED IAW NAVY LEVEL1 ASSURANCE GUIDE, CLEANED IAW MIL-C- 52211. 2 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.