The Valve,safety Relief, cataloged under National Stock Number 4820-01-381-8126, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-381-8126 |
| Primary Part Number | 801-6641188 FIND A10 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +200.0 TO 400.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 160.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 801-6641188 FIND A10 PRIMARY | Naval Sea Systems Command (USA) |
| 801-6641188FNA10 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 801-6641189FNB9 | 5/9 Secondary reference Naval Sea Systems Command |
| 6641189 | D/9 Drawing number reference only Naval Sea Systems Command |
| 801-6641189FNA9 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4820-01-381-8126 is a Valve,safety Relief, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-381-8126 has 2 manufacturer part numbers on file: 801-6641188 FIND A10 (Naval Sea Systems Command), 801-6641188FNA10 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-383-5324, 3020-01-383-5443. Verify interchangeability with system specifications before substitution.
Key specifications for 801-6641188 FIND A10: Flow Control Device: DISK; Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Adjustable Pressure Range: +200.0 TO 400.0 POUNDS PER SQUARE INCH LBS; Maximum Operating Temp: 160.0 FAHRENHEIT SINGLE RESPONSE DEGF. 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.
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.