The Seat,valve, cataloged under National Stock Number 4820-01-420-3285, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-420-3285 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Material Document and Classification | ASTM A216, GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL UNS J03002 SEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| R1019400 | D/9 Drawing number reference only Sure Flow Equipment Inc Div Sure Flow Equipmenrt Inc |
| 1400-CT150CMBWE-07 | 3/9 Design control — primary reference Sure Flow Equipment Inc Div Sure Flow Equipmenrt Inc |
NSN 4820-01-420-3285 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-420-3779. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-420-3285: Material Document and Classification: ASTM A216, GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE SEAT; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: STEEL UNS J03002 SEAT. 2 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.