The Seat,valve, cataloged under National Stock Number 4820-00-360-8823, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-360-8823 |
| Primary Part Number | 255584PC30 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Body Outside Diameter | 8.500 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 5.875 INCHES NOMINAL IN |
| Material | PLASTIC OVERALL |
| Seat Angle in Deg | 43.000 MINIMUM AND 47.000 MAXIMUM |
| Seating Surface Shape | ANGULAR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 255770PC18 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 255584PC30 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 255584PC30 | 5/9 Secondary reference P J Valves Inc |
NSN 4820-00-360-8823 is a Seat,valve, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-360-8823 has 2 manufacturer part numbers on file: 255770PC18 (Huntington Ingalls Inc Div Newport News Shipbuilding), 255584PC30 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 255584PC30: Overall Height: 0.875 INCHES NOMINAL IN; Body Outside Diameter: 8.500 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 5.875 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.