The Stem,needle Valve, cataloged under National Stock Number 4810-01-481-0033, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4810-01-481-0033 |
| Primary Part Number | 1741AS563-1 |
| Item Name | Stem,needle Valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Criticality Code Justification | AGAV |
| Valve Size for Which Designed | 0.187 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 1741AS563-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| H50 | Haltec Corp (USA) |
| Reference | Meaning |
|---|---|
| 1741AS563-1 | 3/9 Design control — primary reference Eaton Corporation Dba Air Controls Division Div Air Controls Division |
NSN 4810-01-481-0033 is a Stem,needle Valve, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-481-0033 has 2 manufacturer part numbers on file: 1741AS563-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), H50 (Haltec Corp).
1 possible match (shared part number, not a government interchangeability claim): 2640-01-530-8297. Verify interchangeability with system specifications before substitution.
Key specifications for 1741AS563-1: Stem Actuating End Type: THREADED EXTERNALLY; Criticality Code Justification: AGAV; Overall Length: 2.000 INCHES NOMINAL IN; Valve Size for Which Designed: 0.187 INCHES 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.