The Stem,fluid Valve, cataloged under National Stock Number 4820-01-421-2173, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-2173 |
| Primary Part Number | 810-2178000-1 ITEM 44Q3 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | ITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 810-2178000-1 ITEM 44Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 810-2178000-4 ITEM 12Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2178000-1 ITEM 44Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 810-2178000-4 ITEM 12 | 5/1 Secondary reference U.S. Government activity |
| 209-6295391 ITEM 44 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-421-2173 is a Stem,fluid Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-2173 has 3 manufacturer part numbers on file: 810-2178000-1 ITEM 44Q3 (Naval Inventory Control Point Mechanicsburg), 810-2178000-4 ITEM 12Q3 (Naval Inventory Control Point Mechanicsburg), 2178000-1 ITEM 44Q3 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 810-2178000-1 ITEM 44Q3: Criticality Code Justification: ZZZY; End Item Identification: BALL VALVE; Reference Number Differentiating Characteristics: ITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION. 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 4820-01-421-2173 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.