The Seat,valve, cataloged under National Stock Number 4820-01-421-2578, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Newmans Inc New Jersey Div. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-421-2578 |
| Primary Part Number | 11F-CB2 2 1/2IN ITEM 2 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Newmans Inc New Jersey Div |
| Status | ACTIVE |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL BODY |
| 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 |
|---|---|
| A0625-00 2.50IN ITEM 2 | Newmans Inc New Jersey Div (USA) |
| 11F-CB2 2 1/2IN ITEM 2 PRIMARY | Newmans Inc New Jersey Div (USA) |
| Reference | Meaning |
|---|---|
| A0625-00 | D/9 Drawing number reference only Newmans Inc New Jersey Div |
NSN 4820-01-421-2578 is a Seat,valve, manufactured by Newmans Inc New Jersey Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-2578 has 2 manufacturer part numbers on file: A0625-00 2.50IN ITEM 2 (Newmans Inc New Jersey Div), 11F-CB2 2 1/2IN ITEM 2 (Newmans Inc New Jersey Div).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-463-0090. Verify interchangeability with system specifications before substitution.
Key specifications for 11F-CB2 2 1/2IN ITEM 2: Material Document and Classification: ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE SEAT; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: STEEL BODY. 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.