The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-126-9771, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 12 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-126-9771 |
| Primary Part Number | 67A77C168-168 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Flow Control Device | DISK, TOP GUIDED |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | SOCKET |
| End Connection Quantity | 2 |
| Valve Loading Method | SPRING |
| Surface Treatment | PAINT OUTSIDE |
| First End Outside Diameter Tube Accommodated | 1.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | REFRIGERANT, NONCORROSIVE |
| Filter | 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 |
|---|---|
| 67A77C168-168 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 67A77C168 | 3/9 Design control — primary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 237AW10/75L-1-1/8-237-104 | 5/9 Secondary reference U.S. Government activity |
| 237-104 | 5/9 Secondary reference U.S. Government activity |
| 67A77C168 | 5/9 Secondary reference U.S. Government activity |
| 237AVILX01528A | 5/9 Secondary reference U.S. Government activity |
| 237AVIL-70237-167 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-126-9771 is a Valve,regulating,fluid Pressure, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-126-9771 has 1 manufacturer part number on file: 67A77C168-168 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-191-2206. Verify interchangeability with system specifications before substitution.
Key specifications for 67A77C168-168: Flow Control Device: DISK, TOP GUIDED; Second End Relationship with First End: IDENTICAL; Body Style: ANGLE; Regulation Type: AUTOMATIC SINGLE STAGE. 12 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.