The Plate,diaphragm, cataloged under National Stock Number 4820-01-529-8200, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-529-8200 |
| Primary Part Number | 7550478-2852200111A-19D4 |
| Item Name | Plate,diaphragm |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZW |
| Departure From Cited Document | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 7550478-2852-2001-13-19 D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2852200111A-19D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2852-2001-11 ITEM 19D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| G547-0002-2852200111A-19D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| B13372-1D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H547-0001-28522001113-19 D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2852-2001-13-19 D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2852-2001-11-19D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7550478-2852200111A-19D4 PRIMARY | Naval Inventory Control Point Mechanicsburg (USA) |
| G547-0002-2852-2001-13-19 D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2852-2001-13-19 | 5/1 Secondary reference Mission Systems Orchard Park Inc |
| 2852-2001-11-19 | 5/1 Secondary reference Carleton Technologies Inc Div Tampa Facility |
| 2852-2001-11 ITEM 19 | 5/1 Secondary reference Mission Systems Orchard Park Inc |
| 2852200111A-19 | 5/1 Secondary reference U.S. Government activity |
| G547-0002-2852-2001-13-19 | 5/1 Secondary reference U.S. Government activity |
| G547-0002-2852200111A-19 | 5/1 Secondary reference U.S. Government activity |
| 7550478-2852-2001-13-19 | 5/1 Secondary reference Naval Sea Systems Command |
| B13372-1 | 5/1 Secondary reference Carleton Technologies Inc Div Tampa Facility |
| 7550478-2852200111A-19 | 5/1 Secondary reference Naval Sea Systems Command |
| H547-0001-28522001113-19 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-529-8200 is a Plate,diaphragm, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-529-8200 has 10 manufacturer part numbers on file: 7550478-2852-2001-13-19 D4 (Naval Inventory Control Point Mechanicsburg), 2852200111A-19D4 (Naval Inventory Control Point Mechanicsburg), 2852-2001-11 ITEM 19D4 (Naval Inventory Control Point Mechanicsburg), G547-0002-2852200111A-19D4 (Naval Inventory Control Point Mechanicsburg), B13372-1D4 (Naval Inventory Control Point Mechanicsburg) and 5 more.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-633-6917. Verify interchangeability with system specifications before substitution.
Key specifications for 7550478-2852200111A-19D4: Criticality Code Justification: ZZZW; Departure From Cited Document: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES. 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.
NSN 4820-01-529-8200 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.