The Seat,valve, cataloged under National Stock Number 4820-00-522-5973, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Goodrich Corporation. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-522-5973 |
| Primary Part Number | 169258 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| FSC Application Data | LANDING GEAR,AIRCRAFT |
| Thread Length | 0.172 INCHES MINIMUM AND 0.187 INCHES MAXIMUM SINGLE THREADED PORTION IN |
| Material Document and Classification | AMS 6370SJGASAE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.312 INCHES SINGLE THREADED PORTION IN |
| Seat Radius | 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 24 SINGLE THREADED PORTION |
| Material | STEEL COMP 4130 OVERALL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 169258 | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 8851811-01 | 3/2 Design control — primary reference U.S. Government activity |
| 169258 | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) |
| 169258 | 5/9 Secondary reference Goodrich Corporation Div Advanced Structures Landing Systems |
| 169258 | 5/9 Secondary reference Goodrich Corp Dba Goodrich Corp |
NSN 4820-00-522-5973 is a Seat,valve, manufactured by Goodrich Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-522-5973 has 1 manufacturer part number on file: 169258 (Goodrich Corporation).
Key specifications for 169258: FSC Application Data: LANDING GEAR,AIRCRAFT; Thread Length: 0.172 INCHES MINIMUM AND 0.187 INCHES MAXIMUM SINGLE THREADED PORTION IN; Material Document and Classification: AMS 6370SJGASAE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Size: 0.312 INCHES SINGLE THREADED PORTION 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.