The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-866-8151, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-866-8151 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | INVERTED FLARE |
| End Connection Quantity | 3 |
| Valve Loading Method | SPRING |
| First End Connection Type | THREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.250 INCHES NOMINAL IN |
| Material | STEEL SEAT |
| Maximum Inlet Pressure Rating | ERR-060 |
| Furnished Items | AUTOMATIC RELIEF VALVE AND INTERNAL PILOT VALVE |
| Thread Size and Series/type Designator | 7/16-20 UNF FIRST END |
| Outlet Pressure Setting | ERR-060 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 214657 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-866-8151 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4720-01-728-6632. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-866-8151: First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: TEE; Regulation Type: AUTOMATIC SINGLE STAGE. 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.