The Cover Plate,valve, cataloged under National Stock Number 4820-01-550-3260, 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 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-550-3260 |
| Primary Part Number | 593-7556855 PC 4 |
| Item Name | Cover Plate,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Specification/standard Data | 81346 - ASTM A276 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 593-7556855 PC 4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7556855 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-550-3260 is a Cover Plate,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-550-3260 has 1 manufacturer part number on file: 593-7556855 PC 4 (Naval Sea Systems Command).
Key specifications for 593-7556855 PC 4: Overall Height: 0.375 INCHES NOMINAL IN; Overall Length: 4.750 INCHES NOMINAL IN; Overall Width: 2.250 INCHES NOMINAL IN; Specification/standard Data: 81346 - ASTM A276 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION. 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.
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.