The Valve,vent, cataloged under National Stock Number 4820-00-617-6520, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Woodward, Inc.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,vent |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Woodward, Inc. (CAGE 31361) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-617-6520 |
| Primary Part Number | 1306-622 |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Woodward, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 1306-622 PRIMARY | Woodward, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1306-622 | 5/9 Secondary reference Woodward, Inc. Div Fuel Systems and Controls |
| RA600S1 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| 1306-620 | 5/9 Secondary reference Woodward, Inc. Div Fuel Systems and Controls |
NSN 4820-00-617-6520 is a Valve,vent, manufactured by Woodward, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-617-6520 has 1 manufacturer part number on file: 1306-622 (Woodward, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4820-00-891-0987, 5331-00-913-7206, 2540-01-311-2649. Verify interchangeability with system specifications before substitution.
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.