The Brush,electrical Contact, cataloged under National Stock Number 5977-01-020-6438, is classified within Federal Supply Class 5977 (Electrical Contact Brushes and Electrodes) of the Electrical and Electronic Equipment Components group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5977-01-020-6438 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Status | ACTIVE |
| Length | 0.612 INCHES NOMINAL IN |
| Terminal Diameter | 0.438 INCHES NOMINAL IN |
| Largest Outside Diameter | 0.327 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Shunt Position Designator | 5 |
| Style Designator | ONE PIECE |
| Material Document and Classification | NATIONAL GRADE T-479 MFR REF SINGLE MATERIAL RESPONSE |
| Pressure Spring Type and Quantity | 1 CYLINDRICAL |
| Brush Shunt Length | 0.796 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Width | 0.375 INCHES NOMINAL IN |
| Material | CARBON GRAPHITE |
| Terminal Type and Quantity | 1 ROUND CAP W/EARS |
| 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 |
|---|---|
| 4995603 | 5/1 Secondary reference Consumers' Aircraft Company Inc |
| 26C251P01 | 3/9 Design control — primary reference National Electrical Carbon Products, Inc. Div Electrical |
NSN 5977-01-020-6438 is a Brush,electrical Contact, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5935-01-336-6899, 3040-01-681-5106. Verify interchangeability with system specifications before substitution.
Key specifications for 5977-01-020-6438: Length: 0.612 INCHES NOMINAL IN; Terminal Diameter: 0.438 INCHES NOMINAL IN; Largest Outside Diameter: 0.327 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR. 15 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.