The Brush,electrical Contact, cataloged under National Stock Number 5977-00-165-0794, 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 Miraj Corp. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5977-00-165-0794 |
| Primary Part Number | M-A4-157 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Miraj Corp |
| Status | ACTIVE |
| Outer Edge to Slot Edge Distance | 0.109 INCHES NOMINAL IN |
| Length | 0.562 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 0.438 INCHES NOMINAL IN |
| Terminal Hole Diameter | 0.139 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Top Style | FLAT WITH RECTANGULAR SLOT |
| Shunt Position Designator | 10 |
| Style Designator | ONE PIECE |
| Material Document and Classification | STACKPOLE CARBON GRADE 43D MFR REF SINGLE MATERIAL RESPONSE |
| Brush Shunt Length | 1.125 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Slot Depth | 0.062 INCHES NOMINAL IN |
| Width | 0.308 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Material | ELECTROGRAPHITIC |
| Terminal Type and Quantity | 1 STRAIGHT W/HOLE |
| Slot Width | 0.094 INCHES NOMINAL IN |
| Thickness | 0.308 INCHES MINIMUM AND 0.312 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 |
NSN 5977-00-165-0794 is a Brush,electrical Contact, manufactured by Miraj Corp, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-165-0794 has 2 manufacturer part numbers on file: A4-157 (Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division), M-A4-157 (Miraj Corp).
1 possible match (shared part number, not a government interchangeability claim): 6110-00-257-5199. Verify interchangeability with system specifications before substitution.
Key specifications for M-A4-157: Outer Edge to Slot Edge Distance: 0.109 INCHES NOMINAL IN; Length: 0.562 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 0.438 INCHES NOMINAL IN. 18 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.