The Holder,electrical Contact Ring, cataloged under National Stock Number 5977-01-320-9979, is classified within Federal Supply Class 5977 (Electrical Contact Brushes and Electrodes) of the Electrical and Electronic Equipment Components group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5977-01-320-9979 |
| Item Name | Holder,electrical Contact Ring |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 BASE SINGLE MOUNTING FACILITY |
| Style Designator | CRADLE WITH BASE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1000473 | 3/2 Design control — primary reference U.S. Government activity |
| 6499-354037-3 | 5/9 Secondary reference Textron Systems Corporation Dba Textron Systems Corp |
| 6499-354037-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5977-01-320-9979 is a Holder,electrical Contact Ring, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 2540-01-542-0896, 4130-01-674-3513. Verify interchangeability with system specifications before substitution.
Key specifications for 5977-01-320-9979: Mounting Facility Type and Quantity: 1 BASE SINGLE MOUNTING FACILITY; Overall Height: 0.498 INCHES NOMINAL IN; Style Designator: CRADLE WITH BASE; Overall Length: 2.250 INCHES NOMINAL IN. 2 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.