The Ring Assembly,electrical Contact, cataloged under National Stock Number 5977-01-101-4721, 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 Leonardo Spa Helicopters Division - Production Site. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5977-01-101-4721 |
| Primary Part Number | T0072080 |
| Item Name | Ring Assembly,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | ACTIVE |
| Diameter | 3.710 INCHES NOMINAL IN |
| Mounting Configuration | FOUR 0.212 IN. DIA MTG HOLES EQUALLY SPACED ON A 3.350 IN. D1A MOUNTING CIRCLE IN |
| Contact Ring Quantity | 12 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| T0072080 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| T0072080 | Leonardo S.p.a. Div Electronics (ITA) |
| Reference | Meaning |
|---|---|
| 3193110 | 7/2 Vendor item drawing reference L3 Technologies, Inc. Div Ocean Systems |
| 42602 | 3/2 Design control — primary reference U.S. Government activity |
| 3193110 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 5977-01-101-4721 is a Ring Assembly,electrical Contact, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-01-101-4721 has 2 manufacturer part numbers on file: T0072080 (Leonardo Spa Helicopters Division - Production Site), T0072080 (Leonardo S.p.a. Div Electronics).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-165-8663. Verify interchangeability with system specifications before substitution.
Key specifications for T0072080: Diameter: 3.710 INCHES NOMINAL IN; Mounting Configuration: FOUR 0.212 IN. DIA MTG HOLES EQUALLY SPACED ON A 3.350 IN. D1A MOUNTING CIRCLE IN; Contact Ring Quantity: 12. 3 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.
NSN 5977-01-101-4721 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.