螺(luo)絲釘(ding)是由頭部(bu)(bu)和(he)螺(luo)桿兩部(bu)(bu)分(fen)構成的一類(lei)常用緊固件(jian)，主要用來連接(jie)固定零(ling)件(jian)，大多是起(qi)到緊固和(he)便于(yu)安裝拆(chai)卸的作用。隨著螺(luo)釘(ding)在我們日常生活中使用越來越廣泛，除了對(dui)其(qi)優點的認同(tong)外(wai)，人們開始關注其(qi)分(fen)類(lei)及規格型號。

螺絲釘種類：

1、開槽普(pu)通螺(luo)(luo)釘(ding)(ding)(ding) 多用(yong)于(yu)較(jiao)小零件的連接。它有盤頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)、圓柱頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)、半(ban)沉頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)和(he)沉頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)。盤頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)和(he)圓柱頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)的釘(ding)(ding)(ding)頭(tou)(tou)強(qiang)度(du)較(jiao)高(gao)，瑁在普(pu)通的部(bu)件連接上;半(ban)沉頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)的頭(tou)(tou)部(bu)呈弧形，安裝后它的頂端略外露(lu)，且美(mei)觀光滑(hua)，一般用(yong)于(yu)儀器或精密機械上;沉頭(tou)(tou)螺(luo)(luo)釘(ding)(ding)(ding)則用(yong)于(yu)不允許釘(ding)(ding)(ding)頭(tou)(tou)露(lu)出(chu)的地(di)方。

2、內(nei)六(liu)角及(ji)內(nei)六(liu)角花形(xing)螺(luo)(luo)釘 這類螺(luo)(luo)釘的頭部能埋入構件中，可施(shi)加較大的扭矩，連接(jie)強度較高，可代替六(liu)角螺(luo)(luo)栓。常用于(yu)結構要求緊湊，外(wai)觀平滑的聯(lian)接(jie)處。

3、十(shi)字(zi)槽普(pu)(pu)通螺(luo)釘(ding) 它與開槽普(pu)(pu)通螺(luo)釘(ding)的使用(yong)功能(neng)相(xiang)似，可互相(xiang)代換，但(dan)十(shi)字(zi)槽普(pu)(pu)通螺(luo)釘(ding)的槽形強度較(jiao)高(gao)，不易(yi)擰禿，外形較(jiao)為美觀(guan)。使用(yong)時(shi)須用(yong)與之(zhi)配套的十(shi)字(zi)形旋具進(jin)行裝卸。

4、吊環(huan)螺(luo)釘(ding) 吊環(huan)螺(luo)釘(ding)是供(gong)安(an)裝和(he)運輸時承(cheng)重的一種五(wu)金(jin)配(pei)件(jian)。使(shi)用(yong)時螺(luo)釘(ding)須(xu)旋進至使(shi)支(zhi)承(cheng)面緊(jin)密(mi)貼合的位置，不(bu)準使(shi)用(yong)工具(ju)扳(ban)緊(jin)，也不(bu)允許有垂直于吊環(huan)平(ping)面的荷載作(zuo)用(yong)在(zai)上面。

5、緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding) 緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding)用(yong)(yong)于(yu)固(gu)定(ding)(ding)(ding)(ding)機(ji)件(jian)(jian)的相對位(wei)置(zhi)。把緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding)旋入待(dai)緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)的零件(jian)(jian)的螺(luo)孔中，以其末端(duan)(duan)緊(jin)(jin)(jin)(jin)(jin)壓在(zai)另一(yi)(yi)零件(jian)(jian)的表面上，即把前一(yi)(yi)零件(jian)(jian)固(gu)定(ding)(ding)(ding)(ding)在(zai)后(hou)一(yi)(yi)零件(jian)(jian)上。 緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding)通(tong)常(chang)由鋼或(huo)不(bu)銹鋼材料(liao)制造，它的端(duan)(duan)頭形(xing)(xing)狀(zhuang)有錐形(xing)(xing)、凹(ao)形(xing)(xing)、平頭形(xing)(xing)、圓柱形(xing)(xing)和(he)階梯形(xing)(xing)等。錐端(duan)(duan)或(huo)凹(ao)端(duan)(duan)緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding)的端(duan)(duan)頭直接頂緊(jin)(jin)(jin)(jin)(jin)零件(jian)(jian)，一(yi)(yi)般用(yong)(yong)于(yu)安裝后(hou)不(bu)常(chang)拆卸處;平端(duan)(duan)緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding)的端(duan)(duan)頭平滑，頂緊(jin)(jin)(jin)(jin)(jin)后(hou)不(bu)損傷零件(jian)(jian)表面，用(yong)(yong)于(yu)需經常(chang)調節(jie)位(wei)置(zhi)的聯(lian)接處，只能傳遞較(jiao)小(xiao)的荷載;圓柱端(duan)(duan)緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)部用(yong)(yong)在(zai)需經常(chang)調節(jie)固(gu)定(ding)(ding)(ding)(ding)位(wei)置(zhi)，它能承受(shou)較(jiao)大的荷載作用(yong)(yong)，但防松(song)(song)性(xing)能差(cha)，固(gu)定(ding)(ding)(ding)(ding)時需采(cai)取防松(song)(song)措(cuo)施(shi);階梯肜緊(jin)(jin)(jin)(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)(ding)適用(yong)(yong)于(yu)壁(bi)厚較(jiao)大的零件(jian)(jian)固(gu)定(ding)(ding)(ding)(ding)。

6、自(zi)攻(gong)螺釘(ding) 自(zi)攻(gong)螺釘(ding)用(yong)在被聯接(jie)件上時，被聯接(jie)處可以不預(yu)先制出螺紋(wen)。在聯接(jie)時利(li)用(yong)螺釘(ding)直(zhi)接(jie)攻(gong)出螺紋(wen)。它(ta)常(chang)用(yong)于(yu)聯接(jie)厚度較薄(bo)的金屬(shu)板。其品種有錐端自(zi)攻(gong)螺釘(ding)與平端自(zi)攻(gong)螺釘(ding)兩種。

7、自(zi)(zi)攻(gong)(gong)鎖緊螺(luo)(luo)釘 自(zi)(zi)攻(gong)(gong)鎖緊螺(luo)(luo)釘不僅具(ju)有自(zi)(zi)攻(gong)(gong)作(zuo)用，而且還具(ju)有低擰入力(li)矩和高鎖緊的(de)(de)(de)性能。它的(de)(de)(de)螺(luo)(luo)紋為三角形(xing)截面，螺(luo)(luo)釘的(de)(de)(de)表面經過淬硬(ying)處理，有較高的(de)(de)(de)硬(ying)度。它的(de)(de)(de)螺(luo)(luo)紋規(gui)格有M2～M12