"cap screw" meaning in English

{
  "forms": [
    {
      "form": "cap screws",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cap screw (plural cap 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"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Engineering",
          "orig": "en:Engineering",
          "parents": [
            "Applied sciences",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A screw that is threaded along the entire length of the shaft and has a cap which is intended to rest against the side of the outermost material being screwed together when the screw has been screwed in to its maximum extent."
      ],
      "id": "en-cap_screw-en-noun-hCBS9VGb",
      "links": [
        [
          "screw",
          "screw"
        ],
        [
          "thread",
          "thread"
        ],
        [
          "shaft",
          "shaft"
        ],
        [
          "cap",
          "cap"
        ]
      ],
      "related": [
        {
          "word": "screw cap"
        }
      ]
    }
  ],
  "word": "cap screw"
}

{
  "forms": [
    {
      "form": "cap screws",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cap screw (plural cap screws)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "screw cap"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Engineering"
      ],
      "glosses": [
        "A screw that is threaded along the entire length of the shaft and has a cap which is intended to rest against the side of the outermost material being screwed together when the screw has been screwed in to its maximum extent."
      ],
      "links": [
        [
          "screw",
          "screw"
        ],
        [
          "thread",
          "thread"
        ],
        [
          "shaft",
          "shaft"
        ],
        [
          "cap",
          "cap"
        ]
      ]
    }
  ],
  "word": "cap screw"
}