The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-941-9609, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); United States Coast Guard Yard (CAGE 06101) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-941-9609 |
| Primary Part Number | 516798 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 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 |
|---|---|
| 516798 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 516798 | United States Coast Guard Yard (USA) |
| Reference | Meaning |
|---|---|
| 416798 | 5/9 Secondary reference Microwave Products Group Inc |
| 516798 | 3/9 Design control — primary reference Aviall Airline Inc |
| 516798 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 516798 | 5/9 Secondary reference Age Logistics Corporation |
NSN 4820-00-941-9609 is a Diaphragm,valve,flat, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-941-9609 has 2 manufacturer part numbers on file: 516798 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 516798 (United States Coast Guard Yard).
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.