The Head and Disk,safety,pressure Re, cataloged under National Stock Number 4820-01-220-8348, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cosmodyne, Llc Dba Cosmodyne Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-220-8348 |
| Primary Part Number | 2602459-1 |
| Item Name | Head and Disk,safety,pressure Re |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cosmodyne, Llc Dba Cosmodyne Llc |
| Status | ACTIVE |
| Disk Material | NICKEL ALLOY |
| Burst Pressure | 6000.0 PRESSURE POUNDS PER SQUARE INCH GAGE |
| Head Type | UNION |
| Disk Type | SOLID |
| Head Material | NICKEL ALLOY AND 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 |
|---|---|
| 2602459-1 PRIMARY | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
| Reference | Meaning |
|---|---|
| 2602459 | D/9 Drawing number reference only Cosmodyne, Llc Dba Cosmodyne Llc |
NSN 4820-01-220-8348 is a Head and Disk,safety,pressure Re, manufactured by Cosmodyne, Llc Dba Cosmodyne Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-220-8348 has 1 manufacturer part number on file: 2602459-1 (Cosmodyne, Llc Dba Cosmodyne Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-221-0265, 4820-01-245-1905. Verify interchangeability with system specifications before substitution.
Key specifications for 2602459-1: Disk Material: NICKEL ALLOY; Burst Pressure: 6000.0 PRESSURE POUNDS PER SQUARE INCH GAGE; Head Type: UNION; Disk Type: SOLID. 5 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.