The Seat,valve, cataloged under National Stock Number 4820-01-462-5080, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mueller Co. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-462-5080 |
| Primary Part Number | ST-4.0-51-04-3-0 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mueller Co |
| Status | ACTIVE |
| Material | RUBBER BUNA N 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 |
|---|---|
| ST-4.0-51-04-3-0 PRIMARY | Mueller Co (USA) |
| Reference | Meaning |
|---|---|
| AN-TAB-51-F | D/9 Drawing number reference only Mueller Co |
NSN 4820-01-462-5080 is a Seat,valve, manufactured by Mueller Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-462-5080 has 1 manufacturer part number on file: ST-4.0-51-04-3-0 (Mueller Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-462-5398. Verify interchangeability with system specifications before substitution.
Key specifications for ST-4.0-51-04-3-0: Special Features: USED ON BUTTERFLY VALVE, P/N 4.0-51INK-3-1; End Item Identification: WATERS CLASS TAGS-45; Material: RUBBER BUNA N 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.