The Gearshaft,spur, cataloged under National Stock Number 3040-01-237-6381, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-237-6381 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Shaft Type | STRAIGHT |
| Shaft Material | STEEL COMP 4140 |
| Shaft End Size | 1.372 INCHES IN |
| Shaft Diameter | 1.372 INCHES NOMINAL IN |
| Teeth Quantity | 18 |
| Diametral Pitch | 8 |
| Gear Outside Diameter | 2.450 INCHES NOMINAL IN |
| Longer Shaft Segment Length | 11.062 INCHES NOMINAL IN |
| Hardness Rating | 260.0 BRINELL STANDARD MINIMUM AND 300.0 BRINELL STANDARD MAXIMUM TEETH |
| Gear Material | STEEL COMP 4140 |
| Shaft End Type | SPLINED INVOLUTE |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 1.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SSN637-709-2144235 PIECE 15 | 5/2 Secondary reference U.S. Government activity |
| SSN637-709-2144235 | D/9 Drawing number reference only U.S. Government activity |
| 77832-60X3 | D/9 Drawing number reference only U.S. Government activity |
| 77832-60X3 PIECE 15 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-237-6381 is a Gearshaft,spur, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 3040-01-237-6382, 3040-01-237-6383, 3040-01-237-6384. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-237-6381: Shaft Type: STRAIGHT; Shaft Material: STEEL COMP 4140; Shaft End Size: 1.372 INCHES IN; Shaft Diameter: 1.372 INCHES NOMINAL 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 3040-01-237-6381 has DEMIL Code B. 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.