The Gear,worm, cataloged under National Stock Number 3020-00-328-8192, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems. Government technical data includes 27 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-328-8192 |
| Primary Part Number | 123AMM50009-11 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Thread Form Direction | RIGHT-HAND |
| Bore Nominal Diameter | 0.449 INCHES BOTH ENDS IN |
| Helix Angle | 11.9425 DEGREES |
| Second Step Nominal Diameter | 0.640 INCHES BOTH ENDS IN |
| Surface Treatment Document and Classification | MIL-C-16173,GRADE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.613 INCHES BOTH ENDS IN |
| First Step Nominal Length | 0.050 INCHES BOTH ENDS IN |
| Face Type | STRAIGHT |
| Hardness Rating | 29.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | FEAT |
| Second Step Nominal Length | 0.219 INCHES BOTH ENDS IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | AAMS 6470 NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL |
| Pitch Diameter | 1.1600 INCHES NOMINAL IN |
| First Step Nominal Diameter | 0.810 INCHES BOTH ENDS IN |
| Hub Style Designator | 2 STEPS BOTH ENDS |
| Spline Quantity | 19 BOTH ENDS |
| Thread Form Quantity | 4 |
| End Nominal Length | 0.344 INCHES BOTH ENDS IN |
| Nominal Outside Diameter | 1.268 INCHES IN |
| Surface Treatment | LUBRICANT OVERALL |
| End Nominal Diameter | 0.624 INCHES BOTH ENDS IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 0.3958 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.000 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 123AMM50009-11 PRIMARY | Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 123AMM50009-11 | 5/9 Secondary reference Speco Corp |
| 123AMM50009-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
| 123AMM50009 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| 123AMM50009-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 3020-00-328-8192 is a Gear,worm, manufactured by Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-328-8192 has 1 manufacturer part number on file: 123AMM50009-11 (Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems).
Key specifications for 123AMM50009-11: Thread Form Direction: RIGHT-HAND; Bore Nominal Diameter: 0.449 INCHES BOTH ENDS IN; Helix Angle: 11.9425 DEGREES; Second Step Nominal Diameter: 0.640 INCHES BOTH ENDS IN. 27 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.