The Seat,valve, cataloged under National Stock Number 4820-01-433-5340, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-433-5340 |
| Primary Part Number | M21F10325-2 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Newmans Inc New Jersey Div |
| Status | ACTIVE |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | ASTM A181 GR. F6A ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL 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 |
|---|---|
| M21F10325-2 PRIMARY | Newmans Inc New Jersey Div (USA) |
| M21F10325 ITEM 2 | Newmans Inc New Jersey Div (USA) |
| Reference | Meaning |
|---|---|
| M21F10325 (77) | D/9 Drawing number reference only Newmans Inc New Jersey Div |
NSN 4820-01-433-5340 is a Seat,valve, manufactured by Newmans Inc New Jersey Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-433-5340 has 2 manufacturer part numbers on file: M21F10325-2 (Newmans Inc New Jersey Div), M21F10325 ITEM 2 (Newmans Inc New Jersey Div).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-437-4458. Verify interchangeability with system specifications before substitution.
Key specifications for M21F10325-2: Style Designator: PLAIN FLANGED; Material Document and Classification: ASTM A181 GR. F6A ASSN STD SINGLE MATERIAL RESPONSE SEAT; Special Features: HARDFACED TO MIL-R-17131 TYPE MIL-R-COCRA; SEALWELDED; End Item Identification: NAVY W/S TH, STRATEGIC SEALIFT CONVERSION SHIPS CLASS; FOR 3IN. NPS CLASS 150 CAST STEEL GLOBE VALVE IN. 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.