The Brush,electrical Contact, cataloged under National Stock Number 5977-00-978-7611, is classified within Federal Supply Class 5977 (Electrical Contact Brushes and Electrodes) of the Electrical and Electronic Equipment Components group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-978-7611 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Status | ACTIVE |
| Length | 0.750 INCHES NOMINAL IN |
| Terminal Diameter | 0.437 INCHES NOMINAL IN |
| Largest Outside Diameter | 0.240 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Top Style | FLAT |
| Shunt Position Designator | 5 |
| Style Designator | ONE PIECE |
| Spring Free Length | 0.800 INCHES NOMINAL IN |
| Pressure Spring Type and Quantity | 1 CYLINDRICAL |
| Brush Shunt Length | 0.800 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | FLAT |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Width | 0.248 INCHES NOMINAL IN |
| Material | SILVER GRAPHITE |
| Terminal Type and Quantity | 1 ROUND CAP |
| Thickness | 0.185 INCHES NOMINAL IN |
| 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 |
|---|---|
| 749220 | 5/2 Secondary reference U.S. Government activity |
| 749220 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5977-00-978-7611 is a Brush,electrical Contact, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-353-2259. Verify interchangeability with system specifications before substitution.
Key specifications for 5977-00-978-7611: Length: 0.750 INCHES NOMINAL IN; Terminal Diameter: 0.437 INCHES NOMINAL IN; Largest Outside Diameter: 0.240 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR. 16 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.