The Stem,fluid Valve, cataloged under National Stock Number 4820-01-433-2633, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-433-2633 |
| Primary Part Number | A12-7533-710-488 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Valve Type for Which Designed | STOP-CHECK |
| Stem Actuating End Type | SQUARE |
| Material Document and Classification | ASTM A479, TYPE 410, CLASS 2 ASSN STD SINGLE MATERIAL RESPONSE AND ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE |
| Features Provided | THREADED |
| Valve Size for Which Designed | 4.000 INCHES IN |
| 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 |
|---|---|
| A12-7533-710-488 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 9999-002 REV H ITEM 25A | 5/1 Secondary reference Velan Valve Corp. |
| 9999-002 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-433-2633 is a Stem,fluid Valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-433-2633 has 1 manufacturer part number on file: A12-7533-710-488 (Velan Valve Corp.).
Key specifications for A12-7533-710-488: Valve Type for Which Designed: STOP-CHECK; Stem Actuating End Type: SQUARE; Material Document and Classification: ASTM A479, TYPE 410, CLASS 2 ASSN STD SINGLE MATERIAL RESPONSE AND ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE; Features Provided: THREADED. 6 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.