The Head and Disk,safety,pressure Re, cataloged under National Stock Number 4820-01-397-5774, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-397-5774 |
| Primary Part Number | 1828AS177-1 |
| Item Name | Head and Disk,safety,pressure Re |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Disk Material | STEEL CORROSION RESISTING |
| Burst Pressure | 600.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Head Type | SCREW |
| Criticality Code Justification | FEAT |
| Disk Type | SOLID |
| Head Material | COPPER ALLOY OR STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 1828AS177-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| CD30376 ASSY S55-1012 600PSI | Continental Disc Corporation, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1828AS177 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4820-01-397-5774 is a Head and Disk,safety,pressure Re, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-397-5774 has 2 manufacturer part numbers on file: 1828AS177-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), CD30376 ASSY S55-1012 600PSI (Continental Disc Corporation, Llc).
Key specifications for 1828AS177-1: Disk Material: STEEL CORROSION RESISTING; Burst Pressure: 600.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Head Type: SCREW; Criticality Code Justification: FEAT. 6 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 4820-01-397-5774 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.