The Brush,electrical Contact, cataloged under National Stock Number 5977-01-122-8005, 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 Kalmar AC Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5977-01-122-8005 |
| Primary Part Number | 4911481-2 |
| Item Name | Brush,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Kalmar AC Inc |
| Status | ACTIVE |
| Outer Edge to Slot Edge Distance | 0.273 INCHES NOMINAL IN |
| Length | 1.112 INCHES NOMINAL IN |
| Body Style | RECTANGULAR |
| Radius | 2.000 INCHES NOMINAL IN |
| Terminal Slot Width | 0.205 INCHES NOMINAL IN |
| Top Style | FLAT WITH BEVELED SLOT |
| Shunt Position Designator | 2 |
| Style Designator | ONE PIECE |
| Material Document and Classification | A C MATERIALS HANDLING CO GRADE B MFR REF SINGLE MATERIAL RESPONSE |
| Angle | 12.0 DEGREES NOMINAL |
| Brush Shunt Length | 1.750 INCHES NOMINAL SINGLE SHUNT IN |
| Contact Face Style | CONCAVE |
| Shunt Insulation Provision and Quantity | 1 INSULATED |
| Width | 0.812 INCHES NOMINAL IN |
| Material | CARBON |
| Terminal Type and Quantity | 1 FLAG W/SLOT |
| Slot Width | 0.266 INCHES NOMINAL IN |
| Thickness | 0.368 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 |
|---|---|
| B-250407-04 | Concentric Rockford Inc (USA) |
| 4911481 | Kalmar AC Inc (USA) |
| 4911481-2 PRIMARY | Kalmar AC Inc (USA) |
| Reference | Meaning |
|---|---|
| B-250411-01 | C/1 Advisory reference — outside the item-of-supply concept Magnetics Intl Inc |
| B250411-C1 | C/1 Advisory reference — outside the item-of-supply concept Magnetics Intl Inc |
NSN 5977-01-122-8005 is a Brush,electrical Contact, manufactured by Kalmar AC Inc, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-122-8005 has 3 manufacturer part numbers on file: B-250407-04 (Concentric Rockford Inc), 4911481 (Kalmar AC Inc), 4911481-2 (Kalmar AC Inc).
1 possible match (shared part number, not a government interchangeability claim): 5977-01-223-6019. Verify interchangeability with system specifications before substitution.
Key specifications for 4911481-2: Outer Edge to Slot Edge Distance: 0.273 INCHES NOMINAL IN; Length: 1.112 INCHES NOMINAL IN; Body Style: RECTANGULAR; Radius: 2.000 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.