The Holder,electrical Contact Brush, cataloged under National Stock Number 5977-00-421-6768, 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 Fairbanks Morse, Llc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5977-00-421-6768 |
| Primary Part Number | 34-4H53116PC21 |
| Item Name | Holder,electrical Contact Brush |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Brush Spring Adjustability | ADJUSTABLE |
| Mounting Facility Quantity | 2 |
| Terminal Quantity | 1 |
| Inside Width | 0.781 INCHES NOMINAL IN |
| Terminal Type | SCREW |
| Inside Length | 0.875 INCHES NOMINAL IN |
| Overall Thickness | 3.250 INCHES NOMINAL IN |
| Brush Pressure Spring Type Accommodated | HELICAL TORSION |
| Mounting Facility | CLAMP AND ROD |
| Inside Thickness | 0.375 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 |
|---|---|
| 34-4H53116PC21 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-3AH53115PC21 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-4AH53117ITEM6 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-4AH53117PC21 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-3H53114ITEM6 PRIMARY | Fairbanks Morse, Llc (USA) |
| 92789-2 PRIMARY | Fairbanks Morse, Llc (USA) |
| 37-3H53124ITEM6 PRIMARY | Fairbanks Morse, Llc (USA) |
| 37-1H53122PC21 PRIMARY | Fairbanks Morse, Llc (USA) |
| 37-1H53122ITEM6 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-4H53116ITEM6 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-3H53114PC21 PRIMARY | Fairbanks Morse, Llc (USA) |
| 34-3AH53115ITEM6 PRIMARY | Fairbanks Morse, Llc (USA) |
| 37-3H53124PC21 PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| 37-3H53124ITEM6 | 5/9 Secondary reference U.S. Government activity |
| 01042838 | 5/9 Secondary reference Louis Allis Co the This Company Has Gone Bankrupt and Has Been Purchased by 3 Companies |
| 92789-2 | 3/9 Design control — primary reference U.S. Government activity |
| 34-3H53114PC21 | 5/9 Secondary reference U.S. Government activity |
| 37-1H53122ITEM6 | 5/9 Secondary reference U.S. Government activity |
| 34-4AH53117ITEM6 | 5/9 Secondary reference U.S. Government activity |
| 37-1H53122PC21 | 5/9 Secondary reference U.S. Government activity |
| 34-4H53116ITEM6 | 5/9 Secondary reference U.S. Government activity |
| 34-4H53116PC21 | 5/9 Secondary reference U.S. Government activity |
| 34-3H53114ITEM6 | 5/9 Secondary reference U.S. Government activity |
| 34-3AH53115ITEM6 | 5/9 Secondary reference U.S. Government activity |
| 34-3AH53115PC21 | 5/9 Secondary reference U.S. Government activity |
| 34-4AH53117PC21 | 5/9 Secondary reference U.S. Government activity |
| 37-3H53124PC21 | 5/9 Secondary reference U.S. Government activity |
NSN 5977-00-421-6768 is a Holder,electrical Contact Brush, manufactured by Fairbanks Morse, Llc, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-421-6768 has 13 manufacturer part numbers on file: 34-4H53116PC21 (Fairbanks Morse, Llc), 34-3AH53115PC21 (Fairbanks Morse, Llc), 34-4AH53117ITEM6 (Fairbanks Morse, Llc), 34-4AH53117PC21 (Fairbanks Morse, Llc), 34-3H53114ITEM6 (Fairbanks Morse, Llc) and 8 more.
1 possible match (shared part number, not a government interchangeability claim): 2805-00-933-3559. Verify interchangeability with system specifications before substitution.
Key specifications for 34-4H53116PC21: Brush Spring Adjustability: ADJUSTABLE; Mounting Facility Quantity: 2; Terminal Quantity: 1; Inside Width: 0.781 INCHES NOMINAL IN. 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.