The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-423-3145, 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 22 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-423-3145 |
| Primary Part Number | 31770NL1 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 6 |
| Flow Control Device | DISK |
| Second End Relationship with First End | IDENTICAL |
| First End Recess Diameter | 1.656 INCHES NOMINAL IN |
| Remote Actuation Method | DIAPHRAGM |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 9.625 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 5.062 INCHES NOMINAL IN |
| First End Style Designator | RECESSED |
| Criticality Code Justification | ZZZY |
| First End Bolt Hole Diameter | 0.562 INCHES NOMINAL IN |
| First End Bolt Circle Diameter | 3.938 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-286, CLASS B FED SPEC SINGLE MATERIAL RESPONSE STEM |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 5.0 TO 20.0 CAMERA MOUNT |
| Valve Loading Method | SPRING |
| First End Connection Type | PLAIN FACE FLANGE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | NICKEL ALLOY AND COPPER ALLOY SEAT |
| Material | RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY K-500 OR NICKEL ALLOY 502 STEM |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 31770NL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| HWWLN-2X 19692N CD 31770NL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| HWWLN-2X 19692NL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| HWWLN-2X 19692N | 5/1 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| 31770N | 5/1 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| HWWLN-2X 19692N CD 31770N | 3/1 Design control — primary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-423-3145 is a Valve,regulating,fluid Pressure, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-423-3145 has 3 manufacturer part numbers on file: 31770NL1 (Naval Inventory Control Point Mechanicsburg), HWWLN-2X 19692N CD 31770NL1 (Naval Inventory Control Point Mechanicsburg), HWWLN-2X 19692NL1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 31770NL1: First End Bolt Hole Quantity: 6; Flow Control Device: DISK; Second End Relationship with First End: IDENTICAL; First End Recess Diameter: 1.656 INCHES NOMINAL IN. 22 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.
NSN 4820-01-423-3145 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.