The Valve,check, cataloged under National Stock Number 4820-01-531-7300, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mega Corp.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | Mega Corp. (CAGE 1BW31) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-531-7300 |
| Primary Part Number | 303640 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mega Corp. |
| 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 |
|---|---|
| 037385 NO. 5 PART NO. 303640 | Mega Corp. (USA) |
| 303640 PRIMARY | Mega Corp. (USA) |
| Reference | Meaning |
|---|---|
| 037385 | D/9 Drawing number reference only Mega Corp. |
NSN 4820-01-531-7300 is a Valve,check, manufactured by Mega Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-531-7300 has 2 manufacturer part numbers on file: 037385 NO. 5 PART NO. 303640 (Mega Corp.), 303640 (Mega Corp.).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-531-7303, 4820-01-531-7305, 4820-01-531-7307. 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.