The Seat,valve, cataloged under National Stock Number 4820-00-239-0205, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell International Inc Div Aerospace-South Bend (bendix Dr). Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-239-0205 |
| Primary Part Number | 2529618 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.110 INCHES NOMINAL IN |
| Flange Diameter | 0.625 INCHES NOMINAL IN |
| Thread Length | 0.215 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 0.090 INCHES NOMINAL SECOND STEP IN |
| Body Stepped Inside Diameter | 0.190 INCHES NOMINAL THIRD STEP IN |
| Body Stepped Inside Diameter | 0.240 INCHES NOMINAL FIRST STEP IN |
| Style Designator | THREADED FLANGED |
| Nominal Thread Size | 0.437 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.610 INCHES NOMINAL IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seat Angle in Deg | 30.000 NOMINAL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SINGLE THREADED PORTION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 2529618 PRIMARY | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA) |
| Reference | Meaning |
|---|---|
| 2529618 | 5/9 Secondary reference Honeywell Aerospatiale Inc |
| 2529618 | 5/9 Secondary reference Unison Industries Llc |
NSN 4820-00-239-0205 is a Seat,valve, manufactured by Honeywell International Inc Div Aerospace-South Bend (bendix Dr), classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-239-0205 has 1 manufacturer part number on file: 2529618 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)).
Key specifications for 2529618: Flange Seat to Disk End Height: 0.110 INCHES NOMINAL IN; Flange Diameter: 0.625 INCHES NOMINAL IN; Thread Length: 0.215 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 0.090 INCHES NOMINAL SECOND STEP IN. 14 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.