The Brake Drum, cataloged under National Stock Number 2530-00-080-6778, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track Components) of the Vehicular Equipment Components group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2530-00-080-6778 |
| Primary Part Number | 6778191 |
| Item Name | Brake Drum |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Adjustment Hole | NOT INCLUDED |
| Balancing Pad | NOT INCLUDED |
| Mounting Hole Spacing | EQUALLY SPACED ON 2-7/8 IN. BOLT CIRCLE IN |
| Braking Surface Width | 1.620 INCHES NOMINAL IN |
| Inspection Hole | NOT INCLUDED |
| Mounting Hole Diameter | 0.401 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN |
| Overall Outside Diameter | 10.435 INCHES MINIMUM AND 10.465 INCHES MAXIMUM IN |
| Braking Surface Location | INTERNAL |
| Oil Drain Hole | NOT INCLUDED |
| Center Hole Diameter | 4.875 INCHES MINIMUM AND 4.879 INCHES MAXIMUM IN |
| Braking Surface Diameter | 9.995 INCHES MINIMUM AND 10.005 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Cooling Fin | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3719V178 | Meritor Heavy Vehicle Systems, Llc (USA) |
| D47527 | Cnh Industrial America Llc Dba Cnh America (USA) |
| 6778191 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 3719V178 PRIMARY | Control Panels Inc (USA) |
| Reference | Meaning |
|---|---|
| 6778191 | 5/9 Secondary reference General Motors Corp |
NSN 2530-00-080-6778 is a Brake Drum, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-080-6778 has 4 manufacturer part numbers on file: 3719V178 (Meritor Heavy Vehicle Systems, Llc), D47527 (Cnh Industrial America Llc Dba Cnh America), 6778191 (Allison Transmission Inc Dba Allison Transmission, Inc), 3719V178 (Control Panels Inc).
Key specifications for 6778191: Mounting Hole Quantity: 4; Adjustment Hole: NOT INCLUDED; Balancing Pad: NOT INCLUDED; Mounting Hole Spacing: EQUALLY SPACED ON 2-7/8 IN. BOLT CIRCLE IN. 14 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.