The Seat,valve, cataloged under National Stock Number 4810-00-977-4181, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4810-00-977-4181 |
| Primary Part Number | 3-43319-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | DAMPENER,FLUTTER,AIRCRAFT HYDRAULIC |
| Body Outside Diameter | 0.387 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 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 |
|---|---|
| 3-43319-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 3-43319-1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 3-43319-1 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 4810-00-977-4181 is a Seat,valve, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-00-977-4181 has 1 manufacturer part number on file: 3-43319-1 (Northrop Grumman Systems Corporation).
Key specifications for 3-43319-1: Overall Height: 0.500 INCHES NOMINAL IN; FSC Application Data: DAMPENER,FLUTTER,AIRCRAFT HYDRAULIC; Body Outside Diameter: 0.387 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 6 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.