The Indicator Assembly, cataloged under National Stock Number 6620-00-421-1778, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Indicator Assembly |
| FSC / FSG | 6620 — Engine Instruments (FSG 66) |
| Parameter | Value |
|---|---|
| NSN | 6620-00-421-1778 |
| Item Name | Indicator Assembly |
| FSC / FSG | 6620 / 66 — Engine Instruments |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Reference | Meaning |
|---|---|
| 6461245 | 5/9 Secondary reference General Motors Llc Dba General Motors |
| 1130-003 | 3/9 Design control — primary reference Spirent Systems Wichita, Inc. |
NSN 6620-00-421-1778 is a Indicator Assembly, classified under FSC 6620, Engine Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2915-01-472-9478. Verify interchangeability with system specifications before substitution.
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.