The Disk,valve, cataloged under National Stock Number 1650-00-970-9974, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-970-9974 |
| Primary Part Number | 128HM10177-1 |
| Item Name | Disk,valve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.495 INCHES NOMINAL IN |
| Flange Diameter | 0.665 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Material Document and Classification | QQ-A-225/9, ALLOY 7075, T6 FED SPEC SINGLE MATERIAL RESPONSE |
| Media for Which Designed | HYDRAULIC FLUID |
| Material | ALUMINUM ALLOY 7075 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 128HM10177-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 128HM10177 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| 128HM10177-1 | 5/9 Secondary reference Fluidonics Inc |
| 128HM10177-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 1650-00-970-9974 is a Disk,valve, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-970-9974 has 1 manufacturer part number on file: 128HM10177-1 (Northrop Grumman Systems Corporation).
Key specifications for 128HM10177-1: Shank Diameter: 0.495 INCHES NOMINAL IN; Flange Diameter: 0.665 INCHES NOMINAL IN; Overall Height: 0.613 INCHES NOMINAL IN; Style Designator: POPPET. 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.
NSN 1650-00-970-9974 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.