The Valve,safety Relief, cataloged under National Stock Number 4820-01-347-4351, 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 19 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-347-4351 |
| Primary Part Number | D50368-1VM |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 1 SPRING |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Criticality Code Justification | FEAT |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A351 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | MIL-R-83248 MIL SPEC SINGLE MATERIAL RESPONSE SEAT |
| Valve Size | 0.500 INCHES IN |
| Second Connection Face to Centerline Distance | 3.250 INCHES IN |
| Mounting Facility | BRACKET(S) |
| First Connection Face to Centerline Distance | 3.250 INCHES IN |
| Material | STEEL CORROSION RESISTING BODY |
| Material | RUBBER SEAT |
| Material | STEEL COMP 304L FLOW CONTROL DEVICE |
| Material | STEEL COMP 304L STEM |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| D50368-1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| R10AD5D506-TL1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| R10AD5D506-TL1 AND D50368-1 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| D50368-1 | 5/1 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| R10AD5D506 AND D50368-1 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| R10AD5D506-TL1 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| R10AD5D506-TL1 AND D50368-1 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| MILV24332GRA.50 | 3/1 Design control — primary reference Naval Inventory Control Point Mechanicsburg |
NSN 4820-01-347-4351 is a Valve,safety Relief, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-347-4351 has 2 manufacturer part numbers on file: D50368-1VM (Naval Inventory Control Point Mechanicsburg), R10AD5D506-TL1VM (Naval Inventory Control Point Mechanicsburg).
Key specifications for D50368-1VM: Flow Control Device: DISK; Furnished Items and Quantity: 1 SPRING; Flange Face Design: RAISED STRAIGHT ALL ENDS; Criticality Code Justification: FEAT. 19 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.