The Seat,valve, cataloged under National Stock Number 4820-01-421-5230, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-5230 |
| Primary Part Number | 414-206-080-139-000 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp |
| Status | ACTIVE |
| Material | RUBBER OVERALL |
| 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 |
|---|---|
| D139-8-540 ITEM 4 | Emerson Automation Solutions Final Control Us Lp (USA) |
| 414-206-080-139-000 PRIMARY | Emerson Automation Solutions Final Control Us Lp (USA) |
| Reference | Meaning |
|---|---|
| D139-8-540 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
NSN 4820-01-421-5230 is a Seat,valve, manufactured by Emerson Automation Solutions Final Control Us Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-5230 has 2 manufacturer part numbers on file: D139-8-540 ITEM 4 (Emerson Automation Solutions Final Control Us Lp), 414-206-080-139-000 (Emerson Automation Solutions Final Control Us Lp).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-421-5281, 4820-01-421-5284, 4820-01-421-5285. Verify interchangeability with system specifications before substitution.
Key specifications for 414-206-080-139-000: End Item Identification: KEYSTONE BUTTERFLY VALVE NO. 540-703-080-139-050 U/O THE STATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: RUBBER OVERALL. 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.