The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-111-1771, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Pneu-Hydro Products. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-111-1771 |
| Primary Part Number | 404M4Q-6 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Pneu-Hydro Products |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | NOT IDENTICAL |
| Surface Treatment Document and Classification | QQ-P-35 MFR REF SINGLE TREATMENT RESPONSE OUTSIDE |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Material Document and Classification | UNABLE TO DECODE |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 900.0 TO 1200.0 CAMERA MOUNT |
| Second End Style Designator | PLAIN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Surface Treatment | PASSIVATE OUTSIDE |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 310 OR STEEL COMP 316 BODY |
| Media for Which Designed | AIR AND GAS |
| Second End Connection Type | UNTHREADED EXTERNAL TUBE |
| Thread Size and Series/type Designator | 1/4-18 NPT FIRST END |
| 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 |
|---|---|
| 404M4Q-6 PRIMARY | Pneu-Hydro Products (USA) |
| Reference | Meaning |
|---|---|
| 404M4S6 | 5/9 Secondary reference Pneu-Hydro Products |
| 805289-1 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-01-111-1771 is a Valve,regulating,fluid Pressure, manufactured by Pneu-Hydro Products, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-111-1771 has 1 manufacturer part number on file: 404M4Q-6 (Pneu-Hydro Products).
Key specifications for 404M4Q-6: First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: NOT IDENTICAL; Surface Treatment Document and Classification: QQ-P-35 MFR REF SINGLE TREATMENT RESPONSE OUTSIDE; Body Style: STRAIGHT THRU. 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.