The Seat,valve, cataloged under National Stock Number 4820-00-404-0422, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-404-0422 |
| Primary Part Number | HP1131108-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.050 INCHES NOMINAL IN |
| Flange Diameter | 0.860 INCHES MINIMUM AND 0.861 INCHES MAXIMUM IN |
| FSC Application Data | CONTROL,HYDRAULIC SYSTEM AIRCRAFT |
| Body Outside Diameter | 0.648 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-S-764 TYPE 302 COND B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.312 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.125 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| HP1131108-1 PRIMARY | Tactair Fluid Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| HP1131108-1 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-404-0422 is a Seat,valve, manufactured by Tactair Fluid Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-404-0422 has 1 manufacturer part number on file: HP1131108-1 (Tactair Fluid Controls Inc).
Key specifications for HP1131108-1: Flange Seat to Disk End Height: 0.050 INCHES NOMINAL IN; Flange Diameter: 0.860 INCHES MINIMUM AND 0.861 INCHES MAXIMUM IN; FSC Application Data: CONTROL,HYDRAULIC SYSTEM AIRCRAFT; Body Outside Diameter: 0.648 INCHES NOMINAL IN. 11 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.