The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-349-1909, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-349-1909 |
| Primary Part Number | D50342-1VM |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flow Control Device | DISK, CIRCULAR |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| First Connection Face to Centerline Distance | 4.125 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| End Connection Quantity | 2 |
| Second Connection Face to Centerline Distance | 4.500 INCHES NOMINAL IN |
| First End Connection Type | RAISED FACE FLANGE |
| Material | STEEL CORROSION RESISTING BODY |
| Reference Number Differentiating Characteristics | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| D50342-1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| R10AF5F514-TL1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| R10AF5F514-TL1 | 3/1 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
| D50342-1 | 5/1 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-349-1909 is a Valve,relief,pressure and Temper, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-349-1909 has 2 manufacturer part numbers on file: D50342-1VM (Naval Inventory Control Point Mechanicsburg), R10AF5F514-TL1VM (Naval Inventory Control Point Mechanicsburg).
Key specifications for D50342-1VM: Flow Control Device: DISK, CIRCULAR; Body Style: ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS; First Connection Face to Centerline Distance: 4.125 INCHES NOMINAL IN; Criticality Code Justification: ZZZY. 9 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.