The Seat,valve, cataloged under National Stock Number 4820-01-433-7156, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-433-7156 |
| Primary Part Number | 9916-000 2.50IN IT4 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 9916-000 2.50IN IT4 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 9916-000 REV C | C/1 Advisory reference — outside the item-of-supply concept Velan Valve Corp. |
| 9916-000 | D/9 Drawing number reference only Velan Valve Corp. |
| 9916-000 2.50IN IT4 | 5/9 Secondary reference Cook Bros. Mfg.& Supply Co. |
NSN 4820-01-433-7156 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-433-7156 has 1 manufacturer part number on file: 9916-000 2.50IN IT4 (Velan Valve Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-433-7215, 4820-01-433-7217. Verify interchangeability with system specifications before substitution.
Key specifications for 9916-000 2.50IN IT4: End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: STEEL CORROSION RESISTING 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.