The Brake Drum, cataloged under National Stock Number 3040-01-067-3855, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Level 10 Industries, Inc. Div Level 10 Industries. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-067-3855 |
| Primary Part Number | 507221 |
| Item Name | Brake Drum |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Level 10 Industries, Inc. Div Level 10 Industries |
| Status | ACTIVE |
| Mounting Hole Quantity | 2 |
| Adjustment Hole | NOT INCLUDED |
| Balancing Pad | NOT INCLUDED |
| Mounting Hole Spacing | EQUALLY SPACED ON 2.375 IN. BOLT CIRCLE IN |
| Braking Surface Width | 1.257 INCHES NOMINAL IN |
| Inspection Hole | NOT INCLUDED |
| Mounting Hole Diameter | 0.312 INCHES NOMINAL IN |
| Overall Outside Diameter | 4.062 INCHES NOMINAL IN |
| Braking Surface Location | EXTERNAL |
| Oil Drain Hole | NOT INCLUDED |
| Center Hole Diameter | 0.365 INCHES NOMINAL IN |
| Braking Surface Diameter | 4.062 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 507221 PRIMARY | Level 10 Industries, Inc. Div Level 10 Industries (USA) |
| Reference | Meaning |
|---|---|
| 507221 | 5/9 Secondary reference Cooper Industries Inc Dba Cooper Tools |
| 507221 | 5/9 Secondary reference Tool House Inc., the |
NSN 3040-01-067-3855 is a Brake Drum, manufactured by Level 10 Industries, Inc. Div Level 10 Industries, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-067-3855 has 1 manufacturer part number on file: 507221 (Level 10 Industries, Inc. Div Level 10 Industries).
Key specifications for 507221: Mounting Hole Quantity: 2; Adjustment Hole: NOT INCLUDED; Balancing Pad: NOT INCLUDED; Mounting Hole Spacing: EQUALLY SPACED ON 2.375 IN. BOLT CIRCLE 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.
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.