The Gearshaft,spur, cataloged under National Stock Number 3040-01-076-4392, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-076-4392 |
| Primary Part Number | 12277531 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL COMP 4340 |
| Shaft Largest Diameter | 1.625 INCHES NOMINAL IN |
| Shaft End Size | 1.000 INCHES AND 1.296 INCHES IN |
| Teeth Quantity | 111 |
| Diametral Pitch | 20/26 |
| Gear Outside Diameter | 5.627 INCHES NOMINAL IN |
| Longer Shaft Segment Length | 0.610 INCHES NOMINAL IN |
| Hardness Rating | 38.0 ROCKWELL C MAXIMUM OVERALL |
| Gear Material | STEEL COMP 4340 |
| Shaft End Type | PLAIN AND SPLINED INVOLUTE |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 0.620 INCHES NOMINAL IN |
| 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 |
|---|---|
| 12277531 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12277531 | 3/9 Design control — primary reference Drs Sustainment Systems, Inc. |
NSN 3040-01-076-4392 is a Gearshaft,spur, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-076-4392 has 1 manufacturer part number on file: 12277531 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12277531: Shaft Type: SHOULDERED; Shaft Material: STEEL COMP 4340; Shaft Largest Diameter: 1.625 INCHES NOMINAL IN; Shaft End Size: 1.000 INCHES AND 1.296 INCHES IN. 14 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 3040-01-076-4392 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.