The Ignition Unit, cataloged under National Stock Number 2930-01-271-8777, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2930-01-271-8777 |
| Primary Part Number | 305639-4 |
| Item Name | Ignition Unit |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | O/A DIM 4.950 IN. LG,3.850 IN. W,2.625 IN. H,HIGH VOLTAGE,CAPICITOR DISCHARGE. IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 305639-4 | Northrop Grumman Systems Corporation (USA) |
| 10-621020-2 | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 305639-4 | 3/2 Design control — primary reference U.S. Government activity |
| 10-621020-2 | 5/9 Secondary reference U.S. Government activity |
NSN 2930-01-271-8777 is a Ignition Unit, manufactured by Northrop Grumman Systems Corporation, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
NSN 2930-01-271-8777 has 2 manufacturer part numbers on file: 305639-4 (Northrop Grumman Systems Corporation), 10-621020-2 (Unison Industries Llc).
Key specifications for 305639-4: General Characteristics Item Description: O/A DIM 4.950 IN. LG,3.850 IN. W,2.625 IN. H,HIGH VOLTAGE,CAPICITOR DISCHARGE. IN. 1 specification is documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 2930-01-271-8777 has DEMIL Code B. 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.