螺(luo)絲(si)釘(ding)是(shi)(shi)由(you)頭部(bu)和螺(luo)桿(gan)兩(liang)部(bu)分構成的(de)一類常用緊固(gu)件，主要用來(lai)連接固(gu)定零件，大多(duo)是(shi)(shi)起到緊固(gu)和便于(yu)安裝拆卸的(de)作(zuo)用。隨著螺(luo)釘(ding)在我(wo)們(men)日常生(sheng)活中使用越來(lai)越廣泛，除了對(dui)其優點(dian)的(de)認同外，人們(men)開(kai)始關(guan)注其分類及規(gui)格型(xing)號。

螺絲釘種類：

1、開槽普通螺(luo)(luo)釘(ding) 多用于(yu)較(jiao)小零件的(de)(de)連接(jie)。它(ta)有盤(pan)頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)、圓(yuan)柱頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)、半沉(chen)頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)和沉(chen)頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)。盤(pan)頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)和圓(yuan)柱頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)的(de)(de)釘(ding)頭(tou)(tou)(tou)強度較(jiao)高，瑁(mao)在普通的(de)(de)部件連接(jie)上(shang);半沉(chen)頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)的(de)(de)頭(tou)(tou)(tou)部呈弧形(xing)，安裝后它(ta)的(de)(de)頂端(duan)略外露，且(qie)美觀光滑(hua)，一般用于(yu)儀器(qi)或精密機械(xie)上(shang);沉(chen)頭(tou)(tou)(tou)螺(luo)(luo)釘(ding)則(ze)用于(yu)不允許釘(ding)頭(tou)(tou)(tou)露出的(de)(de)地(di)方。

2、內六(liu)(liu)角(jiao)(jiao)及內六(liu)(liu)角(jiao)(jiao)花形螺(luo)釘(ding) 這(zhe)類螺(luo)釘(ding)的(de)頭部(bu)能埋入(ru)構(gou)(gou)件中，可施加較大的(de)扭(niu)矩(ju)，連接強度較高，可代替六(liu)(liu)角(jiao)(jiao)螺(luo)栓。常用于結構(gou)(gou)要求緊湊，外觀平滑的(de)聯接處。

3、十字槽(cao)普(pu)通(tong)螺(luo)釘 它(ta)與(yu)開槽(cao)普(pu)通(tong)螺(luo)釘的使(shi)(shi)用(yong)功能相似，可互相代(dai)換(huan)，但十字槽(cao)普(pu)通(tong)螺(luo)釘的槽(cao)形強度較(jiao)高，不(bu)易擰禿，外(wai)形較(jiao)為美觀。使(shi)(shi)用(yong)時須用(yong)與(yu)之配套的十字形旋具(ju)進(jin)行裝卸。

4、吊環螺(luo)釘 吊環螺(luo)釘是(shi)供安裝和(he)運輸時承(cheng)(cheng)重的一種五金(jin)配件。使(shi)用(yong)(yong)時螺(luo)釘須旋進(jin)至(zhi)使(shi)支承(cheng)(cheng)面(mian)(mian)緊密貼合的位置，不(bu)(bu)準(zhun)使(shi)用(yong)(yong)工(gong)具(ju)扳緊，也不(bu)(bu)允許有(you)垂直于(yu)吊環平面(mian)(mian)的荷載作用(yong)(yong)在上面(mian)(mian)。

5、緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding) 緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)用(yong)(yong)(yong)于固(gu)定(ding)(ding)(ding)機件(jian)(jian)的(de)(de)(de)相對位(wei)(wei)置(zhi)。把緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)旋入(ru)待(dai)緊(jin)(jin)定(ding)(ding)(ding)的(de)(de)(de)零(ling)(ling)(ling)件(jian)(jian)的(de)(de)(de)螺(luo)(luo)孔中(zhong)，以其末(mo)端緊(jin)(jin)壓(ya)在(zai)另(ling)一(yi)零(ling)(ling)(ling)件(jian)(jian)的(de)(de)(de)表面上(shang)，即(ji)把前一(yi)零(ling)(ling)(ling)件(jian)(jian)固(gu)定(ding)(ding)(ding)在(zai)后(hou)一(yi)零(ling)(ling)(ling)件(jian)(jian)上(shang)。 緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)通常(chang)由鋼或不(bu)(bu)銹鋼材(cai)料制造，它(ta)的(de)(de)(de)端頭形(xing)狀(zhuang)有錐(zhui)形(xing)、凹(ao)(ao)形(xing)、平(ping)頭形(xing)、圓柱(zhu)形(xing)和階(jie)梯(ti)(ti)形(xing)等。錐(zhui)端或凹(ao)(ao)端緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)的(de)(de)(de)端頭直(zhi)接頂緊(jin)(jin)零(ling)(ling)(ling)件(jian)(jian)，一(yi)般用(yong)(yong)(yong)于安裝后(hou)不(bu)(bu)常(chang)拆卸處(chu);平(ping)端緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)的(de)(de)(de)端頭平(ping)滑，頂緊(jin)(jin)后(hou)不(bu)(bu)損(sun)傷零(ling)(ling)(ling)件(jian)(jian)表面，用(yong)(yong)(yong)于需經常(chang)調(diao)節位(wei)(wei)置(zhi)的(de)(de)(de)聯(lian)接處(chu)，只能傳遞(di)較小的(de)(de)(de)荷(he)載;圓柱(zhu)端緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)部用(yong)(yong)(yong)在(zai)需經常(chang)調(diao)節固(gu)定(ding)(ding)(ding)位(wei)(wei)置(zhi)，它(ta)能承受較大的(de)(de)(de)荷(he)載作用(yong)(yong)(yong)，但防松性能差(cha)，固(gu)定(ding)(ding)(ding)時需采取防松措施;階(jie)梯(ti)(ti)肜緊(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)適用(yong)(yong)(yong)于壁(bi)厚(hou)較大的(de)(de)(de)零(ling)(ling)(ling)件(jian)(jian)固(gu)定(ding)(ding)(ding)。

6、自攻(gong)(gong)螺(luo)釘(ding) 自攻(gong)(gong)螺(luo)釘(ding)用(yong)在(zai)被聯接(jie)(jie)件上時(shi)，被聯接(jie)(jie)處可以不(bu)預先制(zhi)出螺(luo)紋。在(zai)聯接(jie)(jie)時(shi)利用(yong)螺(luo)釘(ding)直接(jie)(jie)攻(gong)(gong)出螺(luo)紋。它常用(yong)于(yu)聯接(jie)(jie)厚度較薄的(de)金屬(shu)板。其品(pin)種有(you)錐(zhui)端自攻(gong)(gong)螺(luo)釘(ding)與(yu)平端自攻(gong)(gong)螺(luo)釘(ding)兩種。

7、自(zi)攻(gong)鎖(suo)緊(jin)螺(luo)釘 自(zi)攻(gong)鎖(suo)緊(jin)螺(luo)釘不(bu)僅具有自(zi)攻(gong)作用，而且還具有低擰(ning)入力矩和高鎖(suo)緊(jin)的(de)性能。它(ta)的(de)螺(luo)紋為三角形截面(mian)(mian)，螺(luo)釘的(de)表面(mian)(mian)經(jing)過淬(cui)硬處理，有較(jiao)高的(de)硬度。它(ta)的(de)螺(luo)紋規(gui)格有M2～M12