The Seat,valve, cataloged under National Stock Number 4820-01-573-7919, 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 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-573-7919 |
| Primary Part Number | 255669 PC 3 TORLON 4203L |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Body Outside Diameter | 1.062 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | TORLON 4203L AS MFGD BY AMOCO CHEMICAL CORP MFR REF SINGLE MATERIAL RESPONSE OR ULTEM 1000 AS MFGD BY GENERAL ELECTRIC COMPANY MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.562 INCHES NOMINAL IN |
| Material | PLASTIC OVERALL |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| 255669 PC 3 TORLON 4203L PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 259089 ITEM 14 TORLON 4203L | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 258850 ITEM 85 TORLON 4203L | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 255669 PC 3 TORLON 4203 | Derbyshire Machine & Tool Co (USA) |
NSN 4820-01-573-7919 is a Seat,valve, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-573-7919 has 4 manufacturer part numbers on file: 255669 PC 3 TORLON 4203L (Huntington Ingalls Inc Div Newport News Shipbuilding), 259089 ITEM 14 TORLON 4203L (Huntington Ingalls Inc Div Newport News Shipbuilding), 258850 ITEM 85 TORLON 4203L (Huntington Ingalls Inc Div Newport News Shipbuilding), 255669 PC 3 TORLON 4203 (Derbyshire Machine & Tool Co).
Key specifications for 255669 PC 3 TORLON 4203L: Overall Height: 0.259 INCHES NOMINAL IN; Body Outside Diameter: 1.062 INCHES NOMINAL IN; Style Designator: PLAIN; Material Document and Classification: TORLON 4203L AS MFGD BY AMOCO CHEMICAL CORP MFR REF SINGLE MATERIAL RESPONSE OR ULTEM 1000 AS MFGD BY GENERAL ELECTRIC COMPANY MFR REF SINGLE MATERIAL RESPONSE OVERALL. 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.