The Ring,electrical Contact, cataloged under National Stock Number 5977-00-644-9677, 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 Naval Sea Systems Command. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5977-00-644-9677 |
| Primary Part Number | 209759-PC 4 |
| Item Name | Ring,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| FSC Application Data | COMPUTER MARK |
| Precious Material | SILVER |
| Shape | CYLINDRICAL |
| Outside Diameter | 2.250 INCHES NOMINAL IN |
| Inside Diameter | 0.016 INCHES NOMINAL IN |
| Precious Material and Location | EXTERNAL SURFACES SILVER |
| Material | SILVER |
| 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 |
|---|---|
| 209759-PC 4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 209759PC4 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 209759PC4REVB | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5977-00-644-9677 is a Ring,electrical Contact, manufactured by Naval Sea Systems Command, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-644-9677 has 1 manufacturer part number on file: 209759-PC 4 (Naval Sea Systems Command).
Key specifications for 209759-PC 4: FSC Application Data: COMPUTER MARK; Precious Material: SILVER; Shape: CYLINDRICAL; Outside Diameter: 2.250 INCHES NOMINAL IN. 7 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.