The Valve,check, cataloged under National Stock Number 4820-01-287-4005, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-287-4005 |
| Primary Part Number | 4900040 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Supplementary Features | APPL TO LANTIRN TARGET POD |
| Material | ALUMINUM OVERALL |
| 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 |
|---|---|
| 4900040 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| C277A-1Q | 3/2 Design control — primary reference U.S. Government activity |
| C277A-10 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-287-4005 is a Valve,check, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-287-4005 has 1 manufacturer part number on file: 4900040 (Rtx Corporation Div Pratt & Whitney).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-686-9090. Verify interchangeability with system specifications before substitution.
Key specifications for 4900040: Supplementary Features: APPL TO LANTIRN TARGET POD; Material: ALUMINUM OVERALL. 2 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.