The Spark Plug, cataloged under National Stock Number 2920-00-554-6658, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Champion Aerospace Llc. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 2920-00-554-6658 |
| Primary Part Number | C88S |
| Item Name | Spark Plug |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Champion Aerospace Llc |
| Status | ACTIVE |
| Pressure Rating | 300.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS |
| Width Across Flats | 0.812 INCHES NOMINAL IN |
| Top to Terminal Contact Distance | 1.000 INCHES NOMINAL IN |
| Height Above Mounting Surface | 1.875 INCHES NOMINAL IN |
| Usage Design | ENGINE OTHER THAN AIRCRAFT |
| Electrode Style | SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4) |
| Body Style | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| DC Resistance Rating in Ohms | 1000.0 NOMINAL |
| Reach Length | 0.500 INCHES NOMINAL IN |
| Seat Major Diameter | 0.795 INCHES NOMINAL IN |
| Shield Thread Length | 0.625 INCHES NOMINAL IN |
| Top to Shield Thread Distance | 0.125 INCHES NOMINAL IN |
| Terminal Sleeve Inside Diameter | 0.380 INCHES NOMINAL IN |
| Barrel Inside Diameter | 0.507 INCHES NOMINAL IN |
| Thread Size and Series/type Designator | 5/8-24 UNEF SHIELD |
| 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 |
|---|---|
| C88S PRIMARY | Champion Aerospace Llc (USA) |
| Reference | Meaning |
|---|---|
| A296664 | 5/9 Secondary reference CAGE 00000 |
| 501007 | 5/9 Secondary reference CAGE 00000 |
NSN 2920-00-554-6658 is a Spark Plug, manufactured by Champion Aerospace Llc, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-00-554-6658 has 1 manufacturer part number on file: C88S (Champion Aerospace Llc).
4 possible matches (shared part number, not a government interchangeability claim): 5930-00-797-4017, 5970-01-065-2878, 3120-01-284-2534. Verify interchangeability with system specifications before substitution.
Key specifications for C88S: Pressure Rating: 300.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS; Width Across Flats: 0.812 INCHES NOMINAL IN; Top to Terminal Contact Distance: 1.000 INCHES NOMINAL IN; Height Above Mounting Surface: 1.875 INCHES NOMINAL IN. 15 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.