The Seat,valve, cataloged under National Stock Number 4810-00-977-2838, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Metallized Carbon Corp. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-00-977-2838 |
| Primary Part Number | 1557002 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Metallized Carbon Corp |
| Status | ACTIVE |
| Taper Minor Diameter | 0.809 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN |
| Seat Angle in Deg | 35.000 NOMINAL |
| 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 |
|---|---|
| 1557002 PRIMARY | Metallized Carbon Corp (USA) |
| 1557002 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| BUWEPSDWG1557002 | 5/9 Secondary reference U.S. Government activity |
| 1557002 | 3/2 Design control — primary reference U.S. Government activity |
| BUWEPSDWG1557002 | 5/9 Secondary reference Sturdy Products Mfg Co |
NSN 4810-00-977-2838 is a Seat,valve, manufactured by Metallized Carbon Corp, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-00-977-2838 has 2 manufacturer part numbers on file: 1557002 (Metallized Carbon Corp), 1557002 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1557002: Taper Minor Diameter: 0.809 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN; Seat Angle in Deg: 35.000 NOMINAL; Seating Surface Shape: ANGULAR. 3 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.