The Seat,valve, cataloged under National Stock Number 4820-00-083-4094, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mid-America Aerotech, Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-083-4094 |
| Primary Part Number | 19344 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mid-America Aerotech, Llc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.072 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN |
| Flange Diameter | 0.347 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN |
| FSC Application Data | VALVE,HYDRAULICSYSTEM,AIRCRAFT |
| Body Outside Diameter | 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.046 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.178 INCHES MINIMUM AND 0.182 INCHES MAXIMUM 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 |
|---|---|
| 19344 PRIMARY | Mid-America Aerotech, Llc (USA) |
| Reference | Meaning |
|---|---|
| 19344 | 5/9 Secondary reference Moog Inc Div Moog Inc., Space and Defense - Salt Lake City |
| 19344 | 5/9 Secondary reference U.S. Government activity |
| 19344 | 5/9 Secondary reference E-Systems Inc Montek Div Fluid Controls Opns |
NSN 4820-00-083-4094 is a Seat,valve, manufactured by Mid-America Aerotech, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-083-4094 has 1 manufacturer part number on file: 19344 (Mid-America Aerotech, Llc).
3 possible matches (shared part number, not a government interchangeability claim): 1730-01-278-2996, 4810-01-416-7433, 3460-01-433-4573. Verify interchangeability with system specifications before substitution.
Key specifications for 19344: Flange Seat to Disk End Height: 0.072 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN; Flange Diameter: 0.347 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN; FSC Application Data: VALVE,HYDRAULICSYSTEM,AIRCRAFT; Body Outside Diameter: 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM 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.