The Valve,check, cataloged under National Stock Number 4820-00-021-3630, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-021-3630 |
| Primary Part Number | 114H4104-2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Renewable Seat Ring Type | PRESSED-IN |
| Connection Style | PLAIN (TUBE) FIRST END |
| Supplementary Features | ADDITIONAL FLOW CONTROL DEVICE: STEM |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-A-250/4, ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-S-764, COND T-CANCELLED FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-S-764,COND T-CANCELLED FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Nominal Outside Diameter Tube Accommodated | 0.558 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Mounting Facility | BRACKET(S) |
| Thread Class | 3A FIRST END A |
| Thread Quantity Per Inch | 18 FIRST END |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | STEEL STEM |
| Material | ALUMINUM ALLOY BODY |
| Thread Series Designator | UNF 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 |
|---|---|
| 114H4104-2 | Associated Aircraft Manufacturing & Sales, Inc. Dba Associated Aircraft Manufacturing & Sales Inc (USA) |
| 114H4104-2 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 114H4104-2 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-021-3630 is a Valve,check, manufactured by The Boeing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-021-3630 has 2 manufacturer part numbers on file: 114H4104-2 (Associated Aircraft Manufacturing & Sales, Inc. Dba Associated Aircraft Manufacturing & Sales Inc), 114H4104-2 (The Boeing Company).
Key specifications for 114H4104-2: Flow Control Device: DISK; Renewable Seat Ring Type: PRESSED-IN; Connection Style: PLAIN (TUBE) FIRST END; Supplementary Features: ADDITIONAL FLOW CONTROL DEVICE: STEM. 19 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.