The Stem,fluid Valve, cataloged under National Stock Number 4820-01-549-4251, 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2 specifications, cited from the U.S. Government catalog. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-549-4251 |
| Item Name | Stem,fluid Valve |
| 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 B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| G547-0002-264382003-064 | 5/1 Secondary reference U.S. Government activity |
| 7550478-264382003-064L1 | 3/1 Design control — primary reference Naval Inventory Control Point Mechanicsburg |
| 264382003-064 | 5/1 Secondary reference U.S. Government activity |
| 845-7286645 ITEM 64 | 5/1 Secondary reference Naval Sea Systems Command |
| 264382003-064L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2643-820-03 ITEM 64 | 5/1 Secondary reference U.S. Government activity |
| 7550478-264382003-064 | 5/1 Secondary reference Naval Sea Systems Command |
| G547-0002-264382003-064L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 845-7286645 ITEM 64L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2643-820-03 ITEM 64L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4820-01-549-4251 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-549-4251: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: STEM BALL VALVE; 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.
NSN 4820-01-549-4251 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.