"coach screw" meaning in English

{
  "forms": [
    {
      "form": "coach screws",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "coach screw (plural coach screws)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1943 September and October, “Railway Construction and Operation at War Department Depots”, in Railway Magazine, page 263",
          "text": "In turnouts the special fittings are secured by coach screws. Portable air compressors with special tools for boring holes and driving the coach screws save both time and labour.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A large metal wood screw with a hexagonal head."
      ],
      "id": "en-coach_screw-en-noun-LYFG~jpU",
      "links": [
        [
          "wood",
          "wood"
        ],
        [
          "hexagonal",
          "hexagonal"
        ],
        [
          "head",
          "head"
        ]
      ],
      "qualifier": "hardware",
      "raw_glosses": [
        "(hardware) A large metal wood screw with a hexagonal head."
      ],
      "synonyms": [
        {
          "word": "lag screw"
        }
      ]
    }
  ],
  "word": "coach screw"
}

{
  "forms": [
    {
      "form": "coach screws",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "coach screw (plural coach screws)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1943 September and October, “Railway Construction and Operation at War Department Depots”, in Railway Magazine, page 263",
          "text": "In turnouts the special fittings are secured by coach screws. Portable air compressors with special tools for boring holes and driving the coach screws save both time and labour.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A large metal wood screw with a hexagonal head."
      ],
      "links": [
        [
          "wood",
          "wood"
        ],
        [
          "hexagonal",
          "hexagonal"
        ],
        [
          "head",
          "head"
        ]
      ],
      "qualifier": "hardware",
      "raw_glosses": [
        "(hardware) A large metal wood screw with a hexagonal head."
      ],
      "synonyms": [
        {
          "word": "lag screw"
        }
      ]
    }
  ],
  "word": "coach screw"
}