The Seat,valve, cataloged under National Stock Number 4820-01-439-5102, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Century Instrument Co. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-439-5102 |
| Primary Part Number | B1790552-01 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Century Instrument Co |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING SEAT |
| 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 |
|---|---|
| DWG NO. 00201205941 PC 8 | Century Instrument Co (USA) |
| B1790552-01 PRIMARY | Century Instrument Co (USA) |
NSN 4820-01-439-5102 is a Seat,valve, manufactured by Century Instrument Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-439-5102 has 2 manufacturer part numbers on file: DWG NO. 00201205941 PC 8 (Century Instrument Co), B1790552-01 (Century Instrument Co).
Key specifications for B1790552-01: Special Features: USED ON 0.500IN VALVE, REGULATING, TEMP IN; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: STEEL CORROSION RESISTING SEAT. 1 specification is 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.