The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-503-5994, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mega Corp.. Government technical data includes 1 specification, 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. 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 | 4820-01-503-5994 |
| Primary Part Number | 303273 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mega Corp. |
| Status | ACTIVE |
| Material | RUBBER |
| 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 |
|---|---|
| 303273 PRIMARY | Mega Corp. (USA) |
NSN 4820-01-503-5994 is a Diaphragm,valve,flat, manufactured by Mega Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-503-5994 has 1 manufacturer part number on file: 303273 (Mega Corp.).
1 possible match (shared part number, not a government interchangeability claim): 1005-01-604-1229. Verify interchangeability with system specifications before substitution.
Key specifications for 303273: Special Features: USED ON 4820-01-503-5992; Part Name Assigned by Controlling Agency: DIAPHRAGM 2" SPHV; End Item Identification: SPRAYING GROUP EQUIPMENT; Material: RUBBER. 1 specification is 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.