The Seat,valve, cataloged under National Stock Number 4820-01-345-5673, 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 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-345-5673 |
| Primary Part Number | 801-6404929 FIND 2Q3 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Body Outside Diameter | 5.971 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Style Designator | PLAIN |
| Body Inside Diameter | 3.950 INCHES NOMINAL IN |
| Material | PLASTIC ACETAL OVERALL |
| Reference Number Differentiating Characteristics | ITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 801-6404929 FIND 2Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 211046627Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| DF330633 FIND 2Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 801-6404929 FIND 2 | 5/1 Secondary reference Naval Sea Systems Command |
| DF330633 FIND 2 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 211046627 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4820-01-345-5673 is a Seat,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-345-5673 has 3 manufacturer part numbers on file: 801-6404929 FIND 2Q3 (Naval Inventory Control Point Mechanicsburg), 211046627Q3 (Naval Inventory Control Point Mechanicsburg), DF330633 FIND 2Q3 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-352-2299. Verify interchangeability with system specifications before substitution.
Key specifications for 801-6404929 FIND 2Q3: Body Outside Diameter: 5.971 INCHES NOMINAL IN; Criticality Code Justification: ZZZY; Style Designator: PLAIN; Body Inside Diameter: 3.950 INCHES NOMINAL IN. 7 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 4820-01-345-5673 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.