The Brake Drum, cataloged under National Stock Number 3040-00-540-6470, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-540-6470 |
| Item Name | Brake Drum |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Mounting Hole Quantity | 12 |
| FSC Application Data | MARINE TRANSMISSION |
| Adjustment Hole | NOT INCLUDED |
| Balancing Pad | NOT INCLUDED |
| Mounting Hole Spacing | EQUALLY SPACED ON 32-3/8 IN. BOLT CIRCLE IN |
| Braking Surface Width | 7.000 INCHES NOMINAL IN |
| Inspection Hole | NOT INCLUDED |
| Mounting Hole Diameter | 0.969 INCHES NOMINAL IN |
| Overall Outside Diameter | 37.000 INCHES NOMINAL IN |
| Braking Surface Location | EXTERNAL |
| Oil Drain Hole | NOT INCLUDED |
| Center Hole Diameter | 30.250 INCHES NOMINAL IN |
| Braking Surface Diameter | 37.000 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Material | STEEL MOUNTING DISK |
| Material | STEEL WEAR SURFACE |
| Cooling Fin | NOT INCLUDED |
| 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 |
|---|---|
| 404599 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-540-6470 is a Brake Drum, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-540-6470: Mounting Hole Quantity: 12; FSC Application Data: MARINE TRANSMISSION; Adjustment Hole: NOT INCLUDED; Balancing Pad: NOT INCLUDED. 17 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.