The Holder,electrical Contact Brush, cataloged under National Stock Number 5977-00-972-9272, 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 Kollmorgen Corp. Government technical data includes 11 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. 2 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 | 5977-00-972-9272 |
| Primary Part Number | A4502 |
| Item Name | Holder,electrical Contact Brush |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Kollmorgen Corp |
| Status | ACTIVE |
| Mounting Facility Quantity | 1 |
| Inside Width | 0.251 INCHES NOMINAL IN |
| Inside Length | 1.560 INCHES NOMINAL IN |
| Overall Diameter | 0.750 INCHES NOMINAL IN |
| Precious Material | SILVER |
| Precious Material and Weight | 0.040 SILVER GRAINS, TROY |
| Brush Quantity Accommodated Per Holder | 1 |
| Mounting Facility | PRESS FIT |
| Precious Material and Location | FINISH SILVER |
| Inside Thickness | 0.313 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 |
NSN 5977-00-972-9272 is a Holder,electrical Contact Brush, manufactured by Kollmorgen Corp, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-972-9272 has 2 manufacturer part numbers on file: A4502 (Kollmorgen Corp), 653 (Phoenix Electric Mfg Co).
2 possible matches (shared part number, not a government interchangeability claim): 1650-01-420-7888, 5935-01-732-9547. Verify interchangeability with system specifications before substitution.
Key specifications for A4502: Mounting Facility Quantity: 1; Inside Width: 0.251 INCHES NOMINAL IN; Inside Length: 1.560 INCHES NOMINAL IN; Overall Diameter: 0.750 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.