The Valve,safety Relief, cataloged under National Stock Number 4820-01-237-6174, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-237-6174 |
| Primary Part Number | C3459-P/L4149-65T100PSI-1/2IPS |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 1 LEVER AND 2 NUT AND 2 TAILPIECE |
| Connection Style | SOCKET WITH BRAZING RING (TUBE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +65.0 TO 100.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | INSIDE SPRING |
| Specification/standard Data | 81349-MIL-V-24332 GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | B GRADE |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | NICKEL ALLOY STEM |
| Material | COPPER ALLOY 922 BODY |
| Material | NICKEL ALLOY AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| 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 |
|---|---|
| C3459-P/L4149-65T100PSI-1/2IPS PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 1384-P/L4149-65T100PSI | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| C3459-P/L4149-65T100PSI | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| 1384P/L4149C345 | C/1 Advisory reference — outside the item-of-supply concept Leslie Controls, Inc. Dba Leslie Controls Inc |
| MIL-V-24332 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-24332 | 4/1 Identification reference U.S. Government activity |
NSN 4820-01-237-6174 is a Valve,safety Relief, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-237-6174 has 2 manufacturer part numbers on file: C3459-P/L4149-65T100PSI-1/2IPS (Leslie Controls, Inc. Dba Leslie Controls Inc), 1384-P/L4149-65T100PSI (Leslie Controls, Inc. Dba Leslie Controls Inc).
Key specifications for C3459-P/L4149-65T100PSI-1/2IPS: Flow Control Device: DISK; Furnished Items and Quantity: 1 LEVER AND 2 NUT AND 2 TAILPIECE; Connection Style: SOCKET WITH BRAZING RING (TUBE) ALL ENDS; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 20 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.