The Brush,electrical Contact, cataloged under National Stock Number 5977-00-144-4274, 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 United Technologies Corp Electro Systems 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-144-4274 |
| Primary Part Number | BR 721018-6 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | United Technologies Corp Electro Systems Inc |
| Status | ACTIVE |
| Length | 0.400 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 0.350 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN |
| Top Style | FLAT |
| Shunt Position Designator | 13 |
| Style Designator | ONE PIECE |
| Material Document and Classification | UNITED STATES GRAPHITE CO,GR 2488 MFR REF SINGLE MATERIAL RESPONSE |
| Brush Shunt Length | 1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Width | 0.250 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN |
| Material | COPPER GRAPHITE |
| Thickness | 0.250 INCHES MINIMUM AND 0.253 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 |
|---|---|
| BR 721018-6 PRIMARY | United Technologies Corp Electro Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BR 721018-6 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
NSN 5977-00-144-4274 is a Brush,electrical Contact, manufactured by United Technologies Corp Electro Systems Inc, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-144-4274 has 1 manufacturer part number on file: BR 721018-6 (United Technologies Corp Electro Systems Inc).
Key specifications for BR 721018-6: Length: 0.400 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 0.350 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN; Top Style: FLAT. 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.