The Brush,electrical Contact, cataloged under National Stock Number 5977-00-914-5250, 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 Enersys Inc. Div Hertner. Government technical data includes 18 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 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 | 5977-00-914-5250 |
| Primary Part Number | 166-12-1 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Enersys Inc. Div Hertner |
| Status | ACTIVE |
| Outer Edge to Slot Edge Distance | 0.070 INCHES NOMINAL IN |
| Length | 0.875 INCHES NOMINAL IN |
| Body Style | RECTANGULAR COMMUTATOR |
| Radius | 1.625 INCHES NOMINAL IN |
| Terminal Hole Diameter | 0.156 INCHES NOMINAL IN |
| Top Style | FLAT WITH RECTANGULAR SLOT |
| Shunt Position Designator | 2 |
| Style Designator | ONE PIECE |
| Material Document and Classification | SPEER CARBON CO,GR E3 MFR REF SINGLE MATERIAL RESPONSE |
| Brush Shunt Length | 1.750 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 UNINSULATED |
| Slot Depth | 0.025 INCHES NOMINAL IN |
| Width | 0.250 INCHES NOMINAL IN |
| Material | ELECTROGRAPHITIC |
| Terminal Type and Quantity | 1 FLAG W/HOLE |
| Slot Width | 0.110 INCHES NOMINAL IN |
| Thickness | 0.250 INCHES NOMINAL 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 |
|---|---|
| 166-12-1 PRIMARY | Enersys Inc. Div Hertner (USA) |
NSN 5977-00-914-5250 is a Brush,electrical Contact, manufactured by Enersys Inc. Div Hertner, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-914-5250 has 1 manufacturer part number on file: 166-12-1 (Enersys Inc. Div Hertner).
1 possible match (shared part number, not a government interchangeability claim): 5945-01-588-6585. Verify interchangeability with system specifications before substitution.
Key specifications for 166-12-1: Outer Edge to Slot Edge Distance: 0.070 INCHES NOMINAL IN; Length: 0.875 INCHES NOMINAL IN; Body Style: RECTANGULAR COMMUTATOR; Radius: 1.625 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.