The Valve,safety Relief, cataloged under National Stock Number 4820-01-598-4613, 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 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-598-4613 |
| Primary Part Number | 801-6404994 ASSY 82 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material | COPPER ALLOY AND NICKEL ALLOY OVERALL |
| 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 |
|---|---|
| 801-6404994 ASSY 82 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211042587 | 3/2 Design control — primary reference U.S. Government activity |
| 801-6404994 | D/9 Drawing number reference only Naval Sea Systems Command |
| DF330811 ASSY 82 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-598-4613 is a Valve,safety Relief, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-598-4613 has 1 manufacturer part number on file: 801-6404994 ASSY 82 (Naval Sea Systems Command).
Key specifications for 801-6404994 ASSY 82: Special Features: CL-A;FORM-4;COND-HF; Part Name Assigned by Controlling Agency: LOCKING DEVICE ASSEMBLY,LOCKED SHUT; End Item Identification: SHELL ASSY,T;LOCKING DEVICES FOR VALVES; Material: COPPER ALLOY AND NICKEL ALLOY OVERALL. 1 specification is 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.