The Brush,electrical Contact, cataloged under National Stock Number 5977-01-280-0364, 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 Miraj Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5977-01-280-0364 |
| Primary Part Number | MBR74 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Miraj Corp |
| Status | ACTIVE |
| Length | 2.000 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 15.000 INCHES NOMINAL IN |
| Style Designator | ONE PIECE |
| Material Document and Classification | MIRAJ CARBON GRADE 89 MFR REF SINGLE MATERIAL RESPONSE |
| Brush Shunt Length | 5.000 INCHES MINIMUM AND 5.400 INCHES MAXIMUM ALL SHUNTS IN |
| Contact Face Style | CONCAVE ON BEVEL |
| Shunt Insulation Provision and Quantity | 2 UNINSULATED |
| Width | 1.230 INCHES MINIMUM AND 1.243 INCHES MAXIMUM IN |
| Material | COPPER AND GRAPHITE |
| Thickness | 0.989 INCHES MINIMUM AND 0.993 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 |
|---|---|
| MBR74 PRIMARY | Miraj Corp (USA) |
| Reference | Meaning |
|---|---|
| FA16BR74 | 5/9 Secondary reference U.S. Government activity |
| FA16BR74 | 5/9 Secondary reference Keystone Carbon Co Inc |
| BR74 | 5/9 Secondary reference Keystone Carbon Co Inc |
| 2303-48 ITEM F | 5/9 Secondary reference U.S. Government activity |
NSN 5977-01-280-0364 is a Brush,electrical Contact, manufactured by Miraj Corp, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-280-0364 has 1 manufacturer part number on file: MBR74 (Miraj Corp).
Key specifications for MBR74: Length: 2.000 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 15.000 INCHES NOMINAL IN; Style Designator: ONE PIECE. 11 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.