The Ring Assembly,electrical Contact, cataloged under National Stock Number 5977-00-487-7930, 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 Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5977-00-487-7930 |
| Primary Part Number | 708251 |
| Item Name | Ring Assembly,electrical Contact |
| FSC / FSG | 5977 / 59 — Electrical Contact Brushes and Electrodes |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| FSC Application Data | VERTICAL GYRO CONTROL |
| Overall Diameter | 1.718 INCHES NOMINAL IN |
| Diameter | 0.135 INCHES NOMINAL IN |
| Mounting Configuration | THREE 0.140 IN. DIA MTG HOLES ON 1.484 IN. DIA BOLT HOLE CIRCLE IN |
| Width | 0.048 INCHES NOMINAL IN |
| Contact Ring Quantity | 10 |
| 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 |
|---|---|
| 708251 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| N6301 | 5/2 Secondary reference U.S. Government activity |
| F475 | 5/2 Secondary reference U.S. Government activity |
NSN 5977-00-487-7930 is a Ring Assembly,electrical Contact, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.
NSN 5977-00-487-7930 has 1 manufacturer part number on file: 708251 (Lockheed Martin Corporation Div Rms - Mitchel Field).
2 possible matches (shared part number, not a government interchangeability claim): 3120-00-630-9287, 5999-01-390-0735. Verify interchangeability with system specifications before substitution.
Key specifications for 708251: FSC Application Data: VERTICAL GYRO CONTROL; Overall Diameter: 1.718 INCHES NOMINAL IN; Diameter: 0.135 INCHES NOMINAL IN; Overall Length: 1.464 INCHES NOMINAL IN. 6 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 5977-00-487-7930 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.