The Holder,electrical Contact Brush, cataloged under National Stock Number 5977-00-617-0399, 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 Kato Engineering Inc.. Government technical data includes 12 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-617-0399 |
| Primary Part Number | X2251 |
| Item Name | Holder,electrical Contact Brush |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Kato Engineering Inc. |
| Status | ACTIVE |
| Brush Spring Adjustability | ADJUSTABLE |
| Mounting Facility Quantity | 2 |
| Terminal Quantity | 2 |
| Inside Width | 0.750 INCHES NOMINAL IN |
| Terminal Type | SCREW |
| Inside Length | 1.188 INCHES NOMINAL IN |
| Overall Thickness | 0.938 INCHES NOMINAL IN |
| Brush Quantity Accommodated Per Holder | 1 |
| Brush Pressure Spring Type Accommodated | HELICAL TORSION |
| Mounting Facility | CLAMP AND ROD |
| Inside Thickness | 0.500 INCHES NOMINAL IN |
| Material | COPPER ALLOY BOX |
| 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 |
|---|---|
| X2251 PRIMARY | Kato Engineering Inc. (USA) |
NSN 5977-00-617-0399 is a Holder,electrical Contact Brush, manufactured by Kato Engineering Inc., classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-617-0399 has 1 manufacturer part number on file: X2251 (Kato Engineering Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3950-01-395-5258. Verify interchangeability with system specifications before substitution.
Key specifications for X2251: Brush Spring Adjustability: ADJUSTABLE; Mounting Facility Quantity: 2; Terminal Quantity: 2; Inside Width: 0.750 INCHES NOMINAL IN. 12 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.