The Brush,electrical Contact, cataloged under National Stock Number 5977-00-284-8972, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-284-8972 |
| Primary Part Number | BR521004 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Length | 0.625 INCHES NOMINAL IN |
| Body Style | CYLINDRICAL |
| Style Designator | ONE PIECE |
| Material Document and Classification | MORGANITE INC,GRADE B6+1 MFR REF SINGLE MATERIAL RESPONSE |
| Diameter | 0.190 INCHES NOMINAL IN |
| Pressure Spring Type and Quantity | 1 CYLINDRICAL WITH REDUCED END |
| Contact Face Style | FLAT |
| Material | CARBON GRAPHITE |
| 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 |
|---|---|
| BR521004 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| BR5219 | United Technologies Corp Electro Systems Inc (USA) |
| BR5230 PRIMARY | United Technologies Corp Electro Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BR5219 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
| BR5230 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
NSN 5977-00-284-8972 is a Brush,electrical Contact, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-284-8972 has 3 manufacturer part numbers on file: BR521004 (Caterpillar Inc Div Caterpillar Defense), BR5219 (United Technologies Corp Electro Systems Inc), BR5230 (United Technologies Corp Electro Systems Inc).
Key specifications for BR521004: Length: 0.625 INCHES NOMINAL IN; Body Style: CYLINDRICAL; Style Designator: ONE PIECE; Material Document and Classification: MORGANITE INC,GRADE B6+1 MFR REF SINGLE MATERIAL RESPONSE. 8 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.