The Brush,electrical Contact, cataloged under National Stock Number 5977-01-033-4366, is classified within Federal Supply Class 5977 (Electrical Contact Brushes and Electrodes) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Essex Electro Engineers Inc. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-01-033-4366 |
| Primary Part Number | A578-1226 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Essex Electro Engineers Inc |
| Status | ACTIVE |
| Length | 1.000 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Terminal Hole Diameter | 0.312 INCHES NOMINAL IN |
| Top Style | FLAT WITH RECTANGULAR SLOT |
| Shunt Position Designator | 2 AND 8 |
| Style Designator | ONE PIECE |
| Brush Shunt Length | 0.875 INCHES NOMINAL SECOND SHUNT IN |
| Brush Shunt Length | 1.250 INCHES NOMINAL FIRST SHUNT IN |
| Contact Face Style | FLAT |
| Shunt Insulation Provision and Quantity | 2 UNINSULATED |
| Width | 0.867 INCHES NOMINAL IN |
| Test Data Document | 21269-QC-100 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). AND 21269-A578 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). |
| Material | CARBON AND COPPER |
| Terminal Type and Quantity | 1 FLAG W/HOLE |
| Thickness | 0.290 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 |
| Part Number | Manufacturer |
|---|---|
| A578-1226 PRIMARY | Essex Electro Engineers Inc (USA) |
NSN 5977-01-033-4366 is a Brush,electrical Contact, manufactured by Essex Electro Engineers Inc, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-033-4366 has 1 manufacturer part number on file: A578-1226 (Essex Electro Engineers Inc).
Key specifications for A578-1226: Length: 1.000 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Terminal Hole Diameter: 0.312 INCHES NOMINAL IN; Top Style: FLAT WITH RECTANGULAR SLOT. 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.