The Ring,electrical Contact, cataloged under National Stock Number 5977-01-149-5956, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5977-01-149-5956 |
| Primary Part Number | 7963180 |
| Item Name | Ring,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Shape | CYLINDRICAL |
| Outside Diameter | 1.666 INCHES NOMINAL IN |
| Inside Diameter | 1.388 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 7963180 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2983-180 | D/9 Drawing number reference only U.S. Government activity |
NSN 5977-01-149-5956 is a Ring,electrical Contact, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-149-5956 has 1 manufacturer part number on file: 7963180 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-419-9950. Verify interchangeability with system specifications before substitution.
Key specifications for 7963180: Shape: CYLINDRICAL; Outside Diameter: 1.666 INCHES NOMINAL IN; Inside Diameter: 1.388 INCHES NOMINAL IN; Special Features: STUD TERMINAL 0.313 DIA BRAZED INSIDE RING TO EXTEND 2.881 BELOW RING; 0.833 STUD THD LENGTH. 4 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.