"barrel nut" meaning in English

{
  "forms": [
    {
      "form": "barrel nuts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "barrel nut (plural barrel nuts)",
      "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": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Norwegian Bokmål translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swedish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Zazaki translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "An internally threaded screw having a slotted head."
      ],
      "id": "en-barrel_nut-en-noun-OvvnjvnZ",
      "links": [
        [
          "screw",
          "screw"
        ]
      ],
      "related": [
        {
          "word": "barrel nut connector"
        },
        {
          "word": "cross dowel"
        }
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "internally-threaded screw with slotted head",
          "tags": [
            "masculine"
          ],
          "word": "Quermutterbolzen"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "internally-threaded screw with slotted head",
          "tags": [
            "masculine"
          ],
          "word": "sargbolt"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "internally-threaded screw with slotted head",
          "tags": [
            "masculine"
          ],
          "word": "sylindermutter"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "cilindríčeskaja gájka",
          "sense": "internally-threaded screw with slotted head",
          "tags": [
            "feminine"
          ],
          "word": "цилиндри́ческая га́йка"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "internally-threaded screw with slotted head",
          "tags": [
            "common-gender"
          ],
          "word": "sargsprint"
        },
        {
          "code": "zza",
          "lang": "Zazaki",
          "sense": "internally-threaded screw with slotted head",
          "word": "somuna fıçıy"
        }
      ]
    }
  ],
  "word": "barrel nut"
}

{
  "forms": [
    {
      "form": "barrel nuts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "barrel nut (plural barrel nuts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "barrel nut connector"
    },
    {
      "word": "cross dowel"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with German translations",
        "Terms with Norwegian Bokmål translations",
        "Terms with Russian translations",
        "Terms with Swedish translations",
        "Terms with Zazaki translations"
      ],
      "glosses": [
        "An internally threaded screw having a slotted head."
      ],
      "links": [
        [
          "screw",
          "screw"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "internally-threaded screw with slotted head",
      "tags": [
        "masculine"
      ],
      "word": "Quermutterbolzen"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "internally-threaded screw with slotted head",
      "tags": [
        "masculine"
      ],
      "word": "sargbolt"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "internally-threaded screw with slotted head",
      "tags": [
        "masculine"
      ],
      "word": "sylindermutter"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "cilindríčeskaja gájka",
      "sense": "internally-threaded screw with slotted head",
      "tags": [
        "feminine"
      ],
      "word": "цилиндри́ческая га́йка"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "internally-threaded screw with slotted head",
      "tags": [
        "common-gender"
      ],
      "word": "sargsprint"
    },
    {
      "code": "zza",
      "lang": "Zazaki",
      "sense": "internally-threaded screw with slotted head",
      "word": "somuna fıçıy"
    }
  ],
  "word": "barrel nut"
}