The Brush,electrical Contact, cataloged under National Stock Number 5977-00-178-8117, 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 Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled. Government technical data includes 14 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-178-8117 |
| Primary Part Number | 4526-2 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled |
| Status | ACTIVE |
| Length | 0.406 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Shunt Position Designator | 5 |
| Style Designator | ONE PIECE |
| Material Document and Classification | MORGANITE IN C GRADE H-6782 MFR REF SINGLE MATERIAL RESPONSE |
| Pressure Spring Type and Quantity | 1 CYLINDRICAL |
| Brush Shunt Length | 1.000 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Width | 0.246 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Material | GRAPHITE |
| Terminal Type and Quantity | 1 ROUND CAP |
| Reference Number Differentiating Characteristics | MARKINGS OPTIONAL |
| Thickness | 0.089 INCHES MINIMUM AND 0.093 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 |
|---|---|
| 4526-2 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| Reference | Meaning |
|---|---|
| 4526-2 | 5/9 Secondary reference Oak Crystal Inc |
| 23609-6 | C/1 Advisory reference — outside the item-of-supply concept Continental Electric Motors, Inc. |
| 23609-6 | 5/1 Secondary reference Telephonics Corp |
| 23609-6 | 5/9 Secondary reference Cessna Aircraft Co Arc Avionics Div |
| 23609-6 | C/1 Advisory reference — outside the item-of-supply concept Lucent Technologies Inc Corporate Headquarters |
| 23609-6 | 5/9 Secondary reference American Telephone and Telegraph Co |
| 23609-6 | 3/9 Design control — primary reference Continental Electric Co Inc |
| 5893583AB4 | 5/9 Secondary reference National Electrical Carbon Products Inc East Stroudsburg-Pa |
NSN 5977-00-178-8117 is a Brush,electrical Contact, manufactured by Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-178-8117 has 1 manufacturer part number on file: 4526-2 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled).
8 possible matches (shared part number, not a government interchangeability claim): 6220-00-228-9003, 4920-00-400-3830, 5330-00-586-5175. Verify interchangeability with system specifications before substitution.
Key specifications for 4526-2: Length: 0.406 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Shunt Position Designator: 5; Style Designator: ONE PIECE. 14 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.