The Brush,electrical Contact, cataloged under National Stock Number 5977-00-263-0708, 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 Becker Brothers Graphite Corp. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-263-0708 |
| Primary Part Number | PR21653-2 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Becker Brothers Graphite Corp |
| Status | ACTIVE |
| Length | 0.437 INCHES NOMINAL IN |
| Terminal Diameter | 0.315 INCHES NOMINAL IN |
| Largest Outside Diameter | 0.222 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 0.484 INCHES NOMINAL IN |
| Top Style | CYLINDRICAL HEAD |
| Shunt Position Designator | 5 |
| Style Designator | ONE PIECE |
| Material Document and Classification | STACKPOLE CARBON CO,GR W9 MFR REF SINGLE MATERIAL RESPONSE |
| Spring Free Length | 1.000 INCHES NOMINAL IN |
| Pressure Spring Type and Quantity | 1 CYLINDRICAL |
| Head Length | 0.062 INCHES NOMINAL IN |
| Brush Shunt Length | 0.750 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Width | 0.262 INCHES NOMINAL IN |
| Material | CARBON |
| Terminal Type and Quantity | 1 ROUND CAP W/EARS |
| Thickness | 0.188 INCHES NOMINAL IN |
| Head Diameter | 0.190 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 |
|---|---|
| PR21653-2 PRIMARY | Becker Brothers Graphite Corp (USA) |
| Reference | Meaning |
|---|---|
| ASB12208 | 5/9 Secondary reference Pincor Power Corp |
NSN 5977-00-263-0708 is a Brush,electrical Contact, manufactured by Becker Brothers Graphite Corp, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-263-0708 has 1 manufacturer part number on file: PR21653-2 (Becker Brothers Graphite Corp).
Key specifications for PR21653-2: Length: 0.437 INCHES NOMINAL IN; Terminal Diameter: 0.315 INCHES NOMINAL IN; Largest Outside Diameter: 0.222 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR. 20 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.