The Valve Assembly,manifold, cataloged under National Stock Number 4820-01-524-1785, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-524-1785 |
| Primary Part Number | 506-7503537 ASSY 99 |
| Item Name | Valve Assembly,manifold |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Quantity | 4 |
| Furnished Items and Quantity | 4 HANDWHEEL |
| Flange Face Design | PLAIN |
| Connection Type | FLANGE, ROUND W/HOLES |
| End Connection Quantity | 5 |
| Body Material | STEEL |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 506-7503537 ASSY 99 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7503537 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-524-1785 is a Valve Assembly,manifold, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-524-1785 has 1 manufacturer part number on file: 506-7503537 ASSY 99 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-524-1789, 4820-01-524-1890, 4820-01-524-1899. Verify interchangeability with system specifications before substitution.
Key specifications for 506-7503537 ASSY 99: Valve Quantity: 4; Furnished Items and Quantity: 4 HANDWHEEL; Flange Face Design: PLAIN; Connection Type: FLANGE, ROUND W/HOLES. 7 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.