The Differential Gear Unit, cataloged under National Stock Number 3040-01-190-1376, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-190-1376 |
| Item Name | Differential Gear Unit |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Overall Length | 2.850 INCHES IN |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 416 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 127503 | 7/2 Vendor item drawing reference Astronautics Corporation of America |
| 33-202-403 | 3/9 Design control — primary reference Thomson Micron, Llc |
NSN 3040-01-190-1376 is a Differential Gear Unit, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6515-01-668-2954. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-190-1376: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Nominal Overall Length: 2.850 INCHES IN; Material Document and Classification: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Special Features: BOTH ENDS DIAMETER 0.935 INCHES NOMINAL; GEAR DIAMETER 0.600 INCHES MAXIMUM; 15 MINUTES OF ARC TOTAL MAXIMUM BACKLASH EACH DIRECTION MEASURED BETWEEN GEARS; TEMPERATURE RANGE -55 DEGREES TO 125 DEGREES CELSIUS; MAXIMUM OPERATING SPEED 60 RPM; 32 MICRO INCHE OVERALL IN. 5 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.