The Gear,drive Motion, cataloged under National Stock Number 3020-01-437-1404, 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 Thyssenkrupp Rothe Erde Usa Inc.. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-437-1404 |
| Primary Part Number | A1978E1 |
| Item Name | Gear,drive Motion |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Thyssenkrupp Rothe Erde Usa Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | 132 TEETH; 20.0 DEG PRESSURE ANGLE; 1.5 DEG DIMETRIAL PITCH |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| AMD-1136 ITEM 2 | Appleton Marine Inc (USA) |
| YMD-7025 | Appleton Marine Inc (USA) |
| A1978E1 PRIMARY | Thyssenkrupp Rothe Erde Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| AMD-1136 | 5/1 Secondary reference Appleton Marine Inc |
NSN 3020-01-437-1404 is a Gear,drive Motion, manufactured by Thyssenkrupp Rothe Erde Usa Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-437-1404 has 3 manufacturer part numbers on file: AMD-1136 ITEM 2 (Appleton Marine Inc), YMD-7025 (Appleton Marine Inc), A1978E1 (Thyssenkrupp Rothe Erde Usa Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 3950-01-437-1460, 4910-01-437-4762. Verify interchangeability with system specifications before substitution.
Key specifications for A1978E1: General Characteristics Item Description: 132 TEETH; 20.0 DEG PRESSURE ANGLE; 1.5 DEG DIMETRIAL PITCH; Special Features: 48 THREADED HOLES EQUALLY SPACED ON 83.000 IN. DIA B.C.; 47 THREADED HOLES ON 48 HOLE PATTERN EQUALLY SPACED ON 73.250 IN. DIA B.C.;OVERALL WIDTH 5.75 IN;OVERALL DIAMETER 88.00 IN;THREAD SIZE AND SERIES TYPE UNC 1.500-6 IN; End Item Identification: IWO JIMA CLASS LPH; Material: STEEL OVERALL. 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.