The Seat,valve, cataloged under National Stock Number 4820-01-335-8203, 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 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-335-8203 |
| Primary Part Number | DF330707, FIND NO.11VG |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Body Outside Diameter | 1.059 INCHES MINIMUM AND 1.061 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.563 INCHES NOMINAL IN |
| Material | PLASTIC OVERALL |
| Reference Number Differentiating Characteristics | ITEMS THAT SUPPORT A LEVEL I OR SUBSAFE CRITICAL SYSTEM/COMPONET THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS, REQUIRES OBJECTIVE QUALITY EVIDENCE (OQE) TRACEABLE TO PERMANET MARKING ON THE MATERIAL, AND CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330 |
| Seating Surface Shape | RADIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| DF330707, FIND NO.11VG | Naval Inventory Control Point Mechanicsburg (USA) |
| 801-6405342 FIND 11VG | Naval Inventory Control Point Mechanicsburg (USA) |
| 211081997VG | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 801-6405342 FIND 11 | 3/1 Design control — primary reference Naval Sea Systems Command |
| DF330707, FIND NO.11 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 211081997 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4820-01-335-8203 is a Seat,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-335-8203 has 3 manufacturer part numbers on file: DF330707, FIND NO.11VG (Naval Inventory Control Point Mechanicsburg), 801-6405342 FIND 11VG (Naval Inventory Control Point Mechanicsburg), 211081997VG (Naval Inventory Control Point Mechanicsburg).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-523-0835, 4820-01-537-8438, 4820-01-653-8363. Verify interchangeability with system specifications before substitution.
Key specifications for DF330707, FIND NO.11VG: Overall Height: 0.250 INCHES NOMINAL IN; Body Outside Diameter: 1.059 INCHES MINIMUM AND 1.061 INCHES MAXIMUM IN; Style Designator: PLAIN; Body Inside Diameter: 0.563 INCHES NOMINAL IN. 6 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.