The Retainer,disk,valve, cataloged under National Stock Number 4820-01-459-8546, 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 3 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-459-8546 |
| Primary Part Number | 33311-30 ITEM 09 1IN |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Valve Size for Which Designed | 1.000 INCHES IN |
| Valve Design Control Activity | 57574 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 33311-30 ITEM 09 1IN PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 33311-30 | D/9 Drawing number reference only Velan Valve Corp. |
| 3554-008-419 | C/1 Advisory reference — outside the item-of-supply concept Velan Valve Corp. |
NSN 4820-01-459-8546 is a Retainer,disk,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-459-8546 has 1 manufacturer part number on file: 33311-30 ITEM 09 1IN (Velan Valve Corp.).
Key specifications for 33311-30 ITEM 09 1IN: Valve Size for Which Designed: 1.000 INCHES IN; Valve Design Control Activity: 57574; End Item Identification: W/S NIMITZ CLASS CVN; Material: STEEL CORROSION RESISTING. 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.