The Valve,check, cataloged under National Stock Number 4820-01-388-3783, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-388-3783 |
| Primary Part Number | DAA3287P002-119 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 5.000 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DAA3287P002-119 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| DAA3287P002 | D/9 Drawing number reference only Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| 0021270100-10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-388-3783 is a Valve,check, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-388-3783 has 1 manufacturer part number on file: DAA3287P002-119 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-391-3907. Verify interchangeability with system specifications before substitution.
Key specifications for DAA3287P002-119: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 5.000 INCHES ALL ENDS IN; Style Designator: STRAIGHT THRU; Special Features: MATERIALS: FLAPPER (DISK, BUTTERFLY TYPE), LEXAN OR EQUIVALENT; SPRING:STEEL, CORROSION RESISTING; NOMINAL INTERNAL OPERATING PRESSURE 10.5 PSIA TO15 PSIA MAXIMUM; NORMAL INTERNAL OPERATING TEMPERATURE 55 DEG F; MINUS 40 DEG, F TO MAX 190 DEG F; NOMINAL SIZE 5.000 IN DIA; P/N 3287P002-119 MAY BE USED IN PLACE OF DAA3287P002-105 BUT -105 MAY NOT BE USED IN PLACE OF -119 IN. 5 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.
NSN 4820-01-388-3783 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.