{
  "$type": "site.standard.document",
  "description": "A spark plug (5; 5') may comprise a shell (20; 120) surrounding a lower part of an insulator (15; 115). The shell (20; 120) may be provided with a tool engaging portion (25; 125), a seal face (30; 130) configured to contact a corresponding seal of a cylinder head (200) of an internal combustion…",
  "path": "/patents/979132",
  "publishedAt": "2014-01-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02F1/242",
    "MWM GMBH [DE]"
  ],
  "textContent": "A spark plug (5; 5') may comprise a shell (20; 120) surrounding a lower part of an insulator (15; 115). The shell (20; 120) may be provided with a tool engaging portion (25; 125), a seal face (30; 130) configured to contact a corresponding seal of a cylinder head (200) of an internal combustion engine, a cylinder engaging threaded portion (40; 140) having a thread diameter (D) configured to screw the spark plug (5; 5') in a threaded bore (210) of the cylinder head (200), and an intermediate portion (35; 135) extending between the shoulder (30; 130) and the cylinder engaging threaded portion (40; 140). The intermediate portion (35; 135) may have a length (L 1 ), wherein: 0.20",
  "title": "Spark plug"
}