The Yoke,counterbalance Pulley, cataloged under National Stock Number 1680-01-531-9589, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1680-01-531-9589 |
| Primary Part Number | 123AM42005-3 |
| Item Name | Yoke,counterbalance Pulley |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment | PRIMER AND ANODIZE |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 123AM42005-3 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 123AM42005 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| 123AM42005-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 1680-01-531-9589 is a Yoke,counterbalance Pulley, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-531-9589 has 1 manufacturer part number on file: 123AM42005-3 (Northrop Grumman Systems Corporation).
Key specifications for 123AM42005-3: Overall Height: 0.437 INCHES NOMINAL IN; Overall Length: 3.000 INCHES NOMINAL IN; Overall Width: 1.000 INCHES NOMINAL IN; Special Features: MATERIAL 7075-T6;MATERIAL SPEC QQ-A-250/12;SURFACE TREATMENT COATING,CHEMICAL FLIM-ALODINE 600/1200 PRIMER,EPOXY POLYMIDE;3 DRILLED NO. 11. (.190-.196) DIA. 2 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.