The Spark Plug, cataloged under National Stock Number 2925-00-554-6473, is classified within Federal Supply Class 2925 (Engine Electrical System Components, Aircraft Prime Moving) of the Engine Accessories group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2925-00-554-6473 |
| Item Name | Spark Plug |
| FSC / FSG | 2925 / 29 — Engine Electrical System Components, Aircraft Prime Moving |
| Status | ACTIVE |
| Width Across Flats | 0.875 INCHES NOMINAL IN |
| Top to Terminal Contact Distance | 1.000 INCHES NOMINAL IN |
| Height Above Mounting Surface | 2.562 INCHES NOMINAL IN |
| Usage Design | AIRCRAFT ENGINE |
| Electrode Style | TWO FLAT GROUND ELECTRODE |
| 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 | 0.970 INCHES NOMINAL IN |
| Shield Thread Length | 0.375 INCHES NOMINAL IN |
| Top to Shield Thread Distance | 0.125 INCHES NOMINAL IN |
| Terminal Sleeve Inside Diameter | 0.376 INCHES NOMINAL IN |
| Barrel Inside Diameter | 0.388 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 |
| Reference | Meaning |
|---|---|
| ACSR83P | 5/9 Secondary reference General Motors Corp |
| SR83P | 5/9 Secondary reference General Motors Corp |
| ACSR83P | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| SR83P | 3/9 Design control — primary reference General Motors Llc Dba General Motors |
| MIL-S-7886 | 4/1 Identification reference U.S. Government activity |
| SR83P | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 2925-00-554-6473 is a Spark Plug, classified under FSC 2925, Engine Electrical System Components, Aircraft Prime Moving. Status: active.
Key specifications for 2925-00-554-6473: Width Across Flats: 0.875 INCHES NOMINAL IN; Top to Terminal Contact Distance: 1.000 INCHES NOMINAL IN; Height Above Mounting Surface: 2.562 INCHES NOMINAL IN; Usage Design: AIRCRAFT ENGINE. 14 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.