The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-00-715-2771, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydrasearch Company, Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-715-2771 |
| Primary Part Number | A404776-3N |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydrasearch Company, Llc |
| Status | ACTIVE |
| Temp Rating | -20.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| Special Test Features | 1.750" - 12UN - 3A; OPERATING TORQUE: 9 FT-LB; NYLON INSERT A |
| Supplementary Features | NSN IS NAVY ALRE / CRITICAL APPLICATION ITEM (CAI) |
| Criticality Code Justification | FEAT |
| Opening Pressure Setting | ERR-060 |
| First End Outside Diameter Tube Accommodated | 6.500 INCHES MAXIMUM IN |
| First End Nominal Pipe Size Accommodated | 0.500 INCHES IN |
| Media for Which Designed | AIR AND WATER, FRESH |
| First End Nominal Thread Size | 1.750 INCHES IN |
| 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 |
|---|---|
| A404776-3N | Hydrasearch Company, Llc (USA) |
| A404776-3N | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (USA) |
| EPA21000-270 | Naval Group Site De Brest (FRA) |
| Reference | Meaning |
|---|---|
| A404776-3N | 5/9 Secondary reference Bec Systems Llc Dba Bec Machine Products |
| A404776-3N | 3/2 Design control — primary reference U.S. Government activity |
| A404776-3N | 5/9 Secondary reference Hydrasearch Co., Inc. Dba Use CAGE Code 32142 for Cataloging |
| A40476-3N | 5/9 Secondary reference Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc |
| A404776-3N CPL-163 | 5/9 Secondary reference Bec Systems Llc Dba Bec Machine Products |
| A404776-3N | 5/2 Secondary reference U.S. Government activity |
| A404776-3N | 5/9 Secondary reference Derbyshire Machine & Tool Co |
| A404776-3N 80020 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-00-715-2771 is a Valve,relief,pressure and Temper, manufactured by Hydrasearch Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-715-2771 has 3 manufacturer part numbers on file: A404776-3N (Hydrasearch Company, Llc), A404776-3N (Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc), EPA21000-270 (Naval Group Site De Brest).
Key specifications for A404776-3N: Temp Rating: -20.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Second End Relationship with First End: NOT IDENTICAL; Special Test Features: 1.750" - 12UN - 3A; OPERATING TORQUE: 9 FT-LB; NYLON INSERT A; Supplementary Features: NSN IS NAVY ALRE / CRITICAL APPLICATION ITEM (CAI). 10 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.