The Disk,valve, cataloged under National Stock Number 4820-01-166-4282, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-166-4282 |
| Primary Part Number | L5871052-003 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Shank Diameter | 0.617 INCHES MINIMUM AND 0.618 INCHES MAXIMUM IN |
| Flange Diameter | 0.617 INCHES MINIMUM AND 0.618 INCHES MAXIMUM IN |
| Inside Depth | 0.720 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Material Document and Classification | QQ-S-763, CLASS 440C, COND A FED SPEC SINGLE MATERIAL RESPONSE |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Inside Diameter | 0.400 INCHES NOMINAL IN |
| Under Flange Height | 0.218 INCHES NOMINAL IN |
| Media for Which Designed | HYDRAULIC FLUID |
| Material | STEEL COMP 440C |
| 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 |
|---|---|
| L5871052-003 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
NSN 4820-01-166-4282 is a Disk,valve, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-166-4282 has 1 manufacturer part number on file: L5871052-003 (The Boeing Company Div Legacy Am&m).
Key specifications for L5871052-003: Shank Diameter: 0.617 INCHES MINIMUM AND 0.618 INCHES MAXIMUM IN; Flange Diameter: 0.617 INCHES MINIMUM AND 0.618 INCHES MAXIMUM IN; Overall Height: 1.000 INCHES NOMINAL IN; Inside Depth: 0.720 INCHES NOMINAL IN. 10 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.