The Valve,check, cataloged under National Stock Number 4820-01-383-8438, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flomega Industries Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-383-8438 |
| Primary Part Number | D900274 4.00 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flomega Industries Inc |
| Status | ACTIVE |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 500.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL CORROSION RESISTING BODY |
| Material | STEEL CORROSION RESISTING STEM |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| CD90008 | Flomega Industries Inc (USA) |
| D900274 4.00 PRIMARY | Flomega Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| D900274-4.00IPS | C/1 Advisory reference — outside the item-of-supply concept Flomega Industries Inc |
NSN 4820-01-383-8438 is a Valve,check, manufactured by Flomega Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-383-8438 has 2 manufacturer part numbers on file: CD90008 (Flomega Industries Inc), D900274 4.00 (Flomega Industries Inc).
Key specifications for D900274 4.00: Connection Type: BUTT WELD PIPE ALL ENDS; Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: 500.0 FAHRENHEIT SINGLE RESPONSE DEGF; Material: STEEL CORROSION RESISTING SEAT. 7 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.