The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-256-0670, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fairchild Industrial Products Company. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-256-0670 |
| Primary Part Number | Z18935-2 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fairchild Industrial Products Company |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | PLAIN |
| Material Document and Classification | UNABLE TO DECODE |
| End Connection Quantity | 2 |
| Valve Loading Method | SPRING |
| First End Connection Type | THREADED INTERNAL PIPE |
| Material | ALUMINUM ALLOY 413.0 OR ALUMINUM ALLOY A380.0 OR ALUMINUM ALLOY 360.0 OR ALUMINUM ALLOY A413.0 OR ALUMINUM ALLOY 380.0 OR ALUMINUM ALLOY 384.0 OR ALUMINUM ALLOY 518.0 OR ALUMINUM ALLOY A360.0 OR ALUMINUM ALLOY 383.0 OR ALUMINUM ALLOY 443.0 OR ALUMINUM ALLOY C443.0 BODY |
| Maximum Inlet Pressure Rating | ERR-060 |
| Thread Size and Series/type Designator | 0.250-18 NPT FIRST END |
| Filter | NOT INCLUDED |
| 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 |
|---|---|
| Z18935-2 PRIMARY | Fairchild Industrial Products Company (USA) |
| 11438306-5 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| ZEA-9955-30132TN-1 PSIG PRESET | 5/9 Secondary reference Fairchild Industrial Products Company |
| ZA18935-2 | 5/9 Secondary reference Fairchild Industrial Products Company |
| 11438306 | 7/1 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 4820-01-256-0670 is a Valve,regulating,fluid Pressure, manufactured by Fairchild Industrial Products Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-256-0670 has 2 manufacturer part numbers on file: Z18935-2 (Fairchild Industrial Products Company), 11438306-5 (Us Army Aviation and Missile Command).
Key specifications for Z18935-2: Flow Control Device: DIAPHRAGM; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 14 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.