The Valve,check, cataloged under National Stock Number 4820-01-175-5076, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is G H Fittings A/s. Government technical data includes 12 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-175-5076 |
| Primary Part Number | 1020-270X1-4 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | G H Fittings A/s |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Thread Class | 2A ALL ENDS A |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | UNF ALL ENDS |
| 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 |
|---|---|
| 1020-270X1-4 | G H Fittings A/s (NOR) |
| Reference | Meaning |
|---|---|
| 26406-1 | 5/9 Secondary reference U.S. Government activity |
| 5-45-5072 | 5/2 Secondary reference U.S. Government activity |
| 5-45-5072 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 5-45-5072 | 3/9 Design control — primary reference U.S. Government activity |
| 26406-1 | 5/2 Secondary reference U.S. Government activity |
| 26406-1 | 5/9 Secondary reference Drs Environmental Systems Inc |
NSN 4820-01-175-5076 is a Valve,check, manufactured by G H Fittings A/s, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-175-5076 has 1 manufacturer part number on file: 1020-270X1-4 (G H Fittings A/s).
Key specifications for 1020-270X1-4: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) ALL ENDS; Mounting Position: HORIZONTAL; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 12 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.