The Differential Gear Unit, cataloged under National Stock Number 3040-00-070-3665, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Astronautics Corporation of America. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-070-3665 |
| Primary Part Number | 100731 |
| Item Name | Differential Gear Unit |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Astronautics Corporation of America |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 100731 PRIMARY | Astronautics Corporation of America (USA) |
| Reference | Meaning |
|---|---|
| 100731 | 5/9 Secondary reference Washington Scientific Industries Inc |
| 100731 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-070-3665 is a Differential Gear Unit, manufactured by Astronautics Corporation of America, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-070-3665 has 1 manufacturer part number on file: 100731 (Astronautics Corporation of America).
2 possible matches (shared part number, not a government interchangeability claim): 5950-00-271-1826, 4940-01-018-0406. Verify interchangeability with system specifications before substitution.
Key specifications for 100731: Special Features: 5F8-16-3-4; End Item Identification: 6605-00-034-2500,INDICATOR,HORIZONAL SITUATION. 0 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 3040-00-070-3665 has DEMIL Code Q. 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.