The Brush,electrical Contact, cataloged under National Stock Number 5977-01-062-0873, 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 Kalmar AC Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-01-062-0873 |
| Primary Part Number | 74912290 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Kalmar AC Inc |
| Status | ACTIVE |
| Length | 1.562 INCHES MINIMUM AND 1.592 INCHES MAXIMUM IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 2.500 INCHES NOMINAL IN |
| Terminal Hole Diameter | 0.280 INCHES NOMINAL IN |
| Top Style | BEVELED FRONT |
| Style Designator | PAIRED |
| Material Document and Classification | UNION CARBIDE GRADE N-49 MFR REF SINGLE MATERIAL RESPONSE |
| Angle | 15.0 DEGREES NOMINAL |
| Brush Shunt Length | 3.000 INCHES NOMINAL ALL SHUNTS IN |
| Contact Face Style | CONCAVE ON BEVEL |
| Shunt Insulation Provision and Quantity | 4 UNINSULATED |
| Terminal Bend Angle | 60.0 DEGREES NOMINAL |
| Width | 1.750 INCHES NOMINAL IN |
| Bevel Angle | 15.0 DEGREES NOMINAL |
| Material | CARBON |
| Terminal Type and Quantity | 1 BENT W/HOLE |
| Thickness | 0.621 INCHES MINIMUM AND 0.625 INCHES MAXIMUM 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 |
|---|---|
| 74912290 | Kalmar AC Inc (USA) |
| Reference | Meaning |
|---|---|
| 4912290 | 5/9 Secondary reference Kalmar AC Inc |
| 53-706-633-001 | 3/2 Design control — primary reference U.S. Government activity |
| 4912290-6 | 5/9 Secondary reference Kalmar AC Inc |
| 4912289-001 | 5/9 Secondary reference Kalmar AC Inc |
NSN 5977-01-062-0873 is a Brush,electrical Contact, manufactured by Kalmar AC Inc, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-062-0873 has 1 manufacturer part number on file: 74912290 (Kalmar AC Inc).
Key specifications for 74912290: Length: 1.562 INCHES MINIMUM AND 1.592 INCHES MAXIMUM IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 2.500 INCHES NOMINAL IN; Terminal Hole Diameter: 0.280 INCHES NOMINAL IN. 17 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.