The Valve,safety Relief, cataloged under National Stock Number 4820-00-863-1337, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Process Supply Inc Dba Defense Products International. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-863-1337 |
| Primary Part Number | 559A6M2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Process Supply Inc Dba Defense Products International |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 559A6M2 PRIMARY | Process Supply Inc Dba Defense Products International (USA) |
| Reference | Meaning |
|---|---|
| 2108700PC1005PM4D-12-2 | 5/9 Secondary reference Cosmodyne, Llc Dba Cosmodyne Llc |
| 1005PM4D12-2 | 5/9 Secondary reference Cosmodyne, Llc Dba Cosmodyne Llc |
| 2107300PC1005PM40-12-2 | 5/9 Secondary reference Cosmodyne, Llc Dba Cosmodyne Llc |
NSN 4820-00-863-1337 is a Valve,safety Relief, manufactured by Process Supply Inc Dba Defense Products International, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-863-1337 has 1 manufacturer part number on file: 559A6M2 (Process Supply Inc Dba Defense Products International).
Key specifications for 559A6M2: Special Features: SELECTED AND TESTED FOR USE ON OXYGEN-NITROGEN VAPORIZER, OXYGEN CLEAN PER MIL-STD-1330D. 0 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.