The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-142-9149, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-142-9149 |
| Primary Part Number | 65651-05088-101 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Flow Control Device | ANY ACCEPTABLE |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 275.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| First End Style Designator | GASKET SEAL |
| Material Document and Classification | 304, CRYOLAB DIV OF CRYENCO MFR REF SINGLE MATERIAL RESPONSE BODY |
| End Connection Quantity | 2 |
| Second End Style Designator | GROOVED |
| Temp Control Device Type | THERMOSTATIC |
| First End Connection Type | THREADED INTERNAL TUBE |
| Temp Adjustability | ADJUSTABLE |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| Material | STEEL COMP 304 BODY |
| Second End Connection Type | UNTHREADED EXTERNAL TUBE |
| Valve Discharge Flow Rate | 3.0 GALLONS PER MINUTE |
| 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 |
|---|---|
| 65651-05088-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 2534 | Pneudraulics, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 65651-05088 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 4820-01-142-9149 is a Valve,relief,pressure and Temper, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-142-9149 has 2 manufacturer part numbers on file: 65651-05088-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 2534 (Pneudraulics, Inc.).
Key specifications for 65651-05088-101: Flow Control Device: ANY ACCEPTABLE; First End Thread Direction: RIGHT-HAND; Temp Rating: 275.0 FAHRENHEIT DEGF; Second End Relationship with First End: NOT IDENTICAL. 15 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.