The Valve,vent, cataloged under National Stock Number 4820-01-436-0868, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-436-0868 |
| Primary Part Number | 211039811 |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-N-286, FORM 2, COND ANL (CD), AH, FIN-B FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.313 INCHES FIRST END IN |
| Seat Angle | 45.0 DEGREES FIRST END |
| Thread Class | 2A FIRST END A |
| Material | NICKEL ALLOY BODY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST END |
| 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 |
|---|---|
| 211039811 PRIMARY | Naval Sea Systems Command (USA) |
| 801-6405547 FIND 12 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405547 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-436-0868 is a Valve,vent, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-436-0868 has 2 manufacturer part numbers on file: 211039811 (Naval Sea Systems Command), 801-6405547 FIND 12 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-444-5458. Verify interchangeability with system specifications before substitution.
Key specifications for 211039811: Connection Style: FLARED (TUBE) FIRST END; Connection Type: THREADED EXTERNAL TUBE FIRST END; Style Designator: STRAIGHT THRU; Material Document and Classification: QQ-N-286, FORM 2, COND ANL (CD), AH, FIN-B FED SPEC SINGLE MATERIAL RESPONSE BODY. 10 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.