The Brush,electrical Contact, cataloged under National Stock Number 5977-00-644-3255, 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15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5977-00-644-3255 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Status | ACTIVE |
| Outer Edge to Slot Edge Distance | 0.171 INCHES NOMINAL IN |
| Length | 0.750 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 1.500 INCHES NOMINAL IN |
| Shunt Position Designator | 2 |
| Style Designator | PAIRED |
| Material Document and Classification | OHIO CARBON CO,GRADE C2 MFR REF SINGLE MATERIAL RESPONSE |
| Brush Shunt Length | 4.625 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Slot Depth | 0.063 INCHES NOMINAL IN |
| Width | 0.498 INCHES NOMINAL IN |
| Material | CARBON |
| Slot Width | 0.156 INCHES NOMINAL IN |
| Thickness | 0.249 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 |
|---|---|
| ANSI/NEMA PUB NO. CB1 | 3/9 Design control — primary reference U.S. Government activity |
| A910 | 5/9 Secondary reference Dyna Corp |
NSN 5977-00-644-3255 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): 4330-00-980-3655. Verify interchangeability with system specifications before substitution.
Key specifications for 5977-00-644-3255: Outer Edge to Slot Edge Distance: 0.171 INCHES NOMINAL IN; Length: 0.750 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 1.500 INCHES NOMINAL IN. 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.