The Brush,electrical Contact, cataloged under National Stock Number 5977-01-020-4220, 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 Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-01-020-4220 |
| Primary Part Number | BYLM258-0-0-04 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Largest Outside Diameter | 0.185 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 0.300 INCHES NOMINAL IN |
| Top Style | CYLINDRICAL HEAD |
| Shunt Position Designator | 5 |
| Style Designator | ONE PIECE |
| Spring Free Length | 0.688 INCHES NOMINAL IN |
| Pressure Spring Type and Quantity | 1 CYLINDRICAL |
| Brush Shunt Length | 0.532 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONVEX |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| 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 |
|---|---|
| BYLM258 | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
| BYLM258-0-0-04 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 5977-01-020-4220 is a Brush,electrical Contact, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-020-4220 has 2 manufacturer part numbers on file: BYLM258 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc), BYLM258-0-0-04 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for BYLM258-0-0-04: Largest Outside Diameter: 0.185 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 0.300 INCHES NOMINAL IN; Top Style: CYLINDRICAL HEAD. 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.