The Spark Plug, cataloged under National Stock Number 2920-00-554-6660, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Harley Davidson Motor Co Inc. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-00-554-6660 |
| Primary Part Number | 3 |
| Item Name | Spark Plug |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Harley Davidson Motor Co Inc |
| Status | ACTIVE |
| Pressure Rating | 175.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS |
| Width Across Flats | 1.125 INCHES NOMINAL IN |
| Usage Design | ENGINE OTHER THAN AIRCRAFT |
| Electrode Style | SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4) |
| Body Style | UNSHIELDED, SOLID POST, GASKET SEAT |
| Reach Length | 0.500 INCHES NOMINAL IN |
| Seat Major Diameter | 0.868 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3 PRIMARY | Harley Davidson Motor Co Inc (USA) |
NSN 2920-00-554-6660 is a Spark Plug, manufactured by Harley Davidson Motor Co Inc, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-00-554-6660 has 1 manufacturer part number on file: 3 (Harley Davidson Motor Co Inc).
Key specifications for 3: Pressure Rating: 175.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS; Width Across Flats: 1.125 INCHES NOMINAL IN; Usage Design: ENGINE OTHER THAN AIRCRAFT; Electrode Style: SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4). 7 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.