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跳至主要內容 內六角螺絲是機械牙螺絲的一種，泛指所有頭部槽形呈現凹六角型的螺絲，頭部內凹的六角型主要是為了搭配使用的手工具，和內六角螺絲搭配的手工具為內六角板手，內六角板手可以插入內六角螺絲使螺絲旋轉以達到緊固的作用。
內六角螺絲材質並沒有特別的規定，可以依照客戶需求而選擇不同的材質，但是一般市面上常見的內六角螺絲材質以合金鋼、不鏽鋼和碳鋼為主，其中又以合金鋼佔大宗，主要原因是內六角螺絲大多使用在需要強力扭力的應用環境，所以內六角螺絲的硬度、扭力會有一定的要求。
內六角螺絲主要是稱呼螺絲頭部槽形呈現凹六角型的螺絲，但是一般常見的內六角螺絲有幾個種類，以頭部的形狀去區分，分別有有頭內六角螺絲、無頭內六角螺絲、半圓頭內六角螺絲和皿頭內六角螺絲。
其中在市面上稱呼有頭內六角螺絲是內六角螺絲、無頭內六角螺絲是止付螺絲、皿頭內六角螺絲是平頭內六角螺絲、半圓頭內六角螺絲是半丸頭內六角螺絲。
在市面上常見的特殊內六角螺絲則有定位珠、等高螺絲和油塞。
皿頭內六角螺絲(平頭內六角螺絲) 半圓頭內六角螺絲(半丸頭內六角螺絲) 無頭內六角螺絲(止付螺絲) 特殊內六角螺絲 有頭內六角螺絲 內六角螺絲、板手 負荷能力強 可以搭配手工具使用 有工具才能使用，有些防盜螺絲有特製的孔，要對應特別的工具才能轉開 內六角槽形沒有防鏽處理容易生鏽 內六角孔如果變形(滑牙)，容易卡死，不易拆除 一般沒有工具不好拆卸 內六角板手是鈑手的一種，主要是使用在內六角螺絲上，一般呈現L形狀，最開始製作內六角板手的公司叫做Allen Manufacturing Company，所以也稱作艾倫扳手。
內六角板手材質並沒有特別的規定，可以依照客戶需求而選擇不同的材質，但是一般市面上常見的內六角板手材質以合金鋼、不鏽鋼和碳鋼為主，其中又以合金鋼佔大宗，主要原因是內六角板手大多使用在需要強力扭力的應用環境，像是工廠、修車廠等，所以內六角螺絲的硬度、扭力會有一定的要求。
內六角板手種類主要是為了要對應內六角螺絲的頭部槽形，主要是大小規格的不同，一般分成英制板手和公制板手，特殊的內六角板手則有球形板手。
英制板手 公制板手 內六角板手 結構簡單 兩頭六角形都可以使用 可以搭配內六角螺絲使用 要對應相對應規格的六角孔才可以使用 強度沒有其他類型板手強 非電動的內六角板手要轉很久 內六角螺絲的英文是Hex Socket Head Screws。Hex是Hexagon的縮寫，中文是六邊形、Socket的中文是插槽、Head的中文是頭部、Screws的中文是螺絲。
和一般六角螺絲一樣，螺牙的規格加上長度就是內六角螺絲的規格。例如:有頭內六角螺絲的螺牙是M6*P1.0，長度是20MM，規格就是M6*20 P1.0。
一般市面上常見的內六角螺絲材質以合金鋼、不鏽鋼和碳鋼為主，其中又以合金鋼佔大宗。
1.可以使用別種形狀的板手看看
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