The Valve,check, cataloged under National Stock Number 4820-01-262-7503, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trifax Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Trifax Llc (CAGE 5UXH7) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-262-7503 |
| Primary Part Number | GOV-005-021 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trifax Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| GOV-005-021 PRIMARY | Trifax Llc (USA) |
| Reference | Meaning |
|---|---|
| 463-410-061 | 5/9 Secondary reference Lubriquip Inc Dba Lubriquip, Inc., a Unit of Idex |
| GOV-005-021 | 3/9 Design control — primary reference Lubriquip Inc Dba Lubriquip, Inc., a Unit of Idex |
| 2018-40 ITEM 76 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 2018-40 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-262-7503 is a Valve,check, manufactured by Trifax Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-262-7503 has 1 manufacturer part number on file: GOV-005-021 (Trifax Llc).
2 possible matches (shared part number, not a government interchangeability claim): 3010-01-262-8443, 5915-01-559-8039. Verify interchangeability with system specifications before substitution.
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.