螺(luo)絲釘是(shi)由頭部(bu)和螺(luo)桿(gan)兩部(bu)分構(gou)成的(de)(de)一類常用(yong)緊(jin)固(gu)件，主要用(yong)來連接固(gu)定零件，大多是(shi)起到緊(jin)固(gu)和便于安裝(zhuang)拆卸(xie)的(de)(de)作用(yong)。隨著螺(luo)釘在(zai)我們日常生活(huo)中使用(yong)越來越廣泛，除了(le)對(dui)其(qi)(qi)優點的(de)(de)認同外，人們開始關注(zhu)其(qi)(qi)分類及(ji)規格(ge)型號。

螺絲釘種類：

1、開槽(cao)普通(tong)螺(luo)(luo)(luo)釘(ding)(ding)(ding) 多用于較小(xiao)零件的(de)連接(jie)。它(ta)(ta)有(you)盤(pan)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)、圓柱(zhu)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)、半沉(chen)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)和沉(chen)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)。盤(pan)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)和圓柱(zhu)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)的(de)釘(ding)(ding)(ding)頭(tou)(tou)強(qiang)度較高，瑁在普通(tong)的(de)部件連接(jie)上(shang);半沉(chen)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)的(de)頭(tou)(tou)部呈弧形(xing)，安裝后它(ta)(ta)的(de)頂端略外(wai)露，且美(mei)觀光滑，一般用于儀器或精密機械上(shang);沉(chen)頭(tou)(tou)螺(luo)(luo)(luo)釘(ding)(ding)(ding)則用于不允許釘(ding)(ding)(ding)頭(tou)(tou)露出(chu)的(de)地方。

2、內六(liu)角及內六(liu)角花(hua)形(xing)螺(luo)釘 這類螺(luo)釘的(de)頭部能埋(mai)入構件中，可施加(jia)較大的(de)扭(niu)矩(ju)，連接(jie)強(qiang)度(du)較高，可代替(ti)六(liu)角螺(luo)栓。常用于結構要(yao)求緊湊，外觀平(ping)滑的(de)聯接(jie)處(chu)。

3、十(shi)字(zi)槽(cao)普通(tong)螺(luo)釘(ding) 它(ta)與開槽(cao)普通(tong)螺(luo)釘(ding)的使用功能(neng)相(xiang)似，可互相(xiang)代換，但十(shi)字(zi)槽(cao)普通(tong)螺(luo)釘(ding)的槽(cao)形(xing)強度較(jiao)高，不易擰禿，外形(xing)較(jiao)為(wei)美觀。使用時須用與之配套的十(shi)字(zi)形(xing)旋具進行裝卸。

4、吊(diao)環螺釘(ding) 吊(diao)環螺釘(ding)是(shi)供安裝和運(yun)輸時承重(zhong)的一種(zhong)五金(jin)配件。使(shi)用時螺釘(ding)須旋進至使(shi)支承面(mian)緊密(mi)貼合的位置(zhi)，不準使(shi)用工(gong)具(ju)扳緊，也不允許有垂直于吊(diao)環平面(mian)的荷載(zai)作(zuo)用在(zai)上面(mian)。

5、緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding) 緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)用(yong)于(yu)(yu)固(gu)(gu)定(ding)(ding)(ding)(ding)機件(jian)(jian)(jian)的(de)相對位置。把緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)旋入待緊(jin)(jin)定(ding)(ding)(ding)(ding)的(de)零(ling)件(jian)(jian)(jian)的(de)螺(luo)孔中，以其末端(duan)(duan)緊(jin)(jin)壓在(zai)另(ling)一零(ling)件(jian)(jian)(jian)的(de)表面(mian)上，即把前一零(ling)件(jian)(jian)(jian)固(gu)(gu)定(ding)(ding)(ding)(ding)在(zai)后(hou)一零(ling)件(jian)(jian)(jian)上。 緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)通常(chang)由鋼或(huo)不銹鋼材料制(zhi)造(zao)，它的(de)端(duan)(duan)頭(tou)(tou)形狀(zhuang)有錐形、凹(ao)形、平頭(tou)(tou)形、圓柱形和階梯(ti)形等。錐端(duan)(duan)或(huo)凹(ao)端(duan)(duan)緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)的(de)端(duan)(duan)頭(tou)(tou)直接(jie)頂(ding)(ding)緊(jin)(jin)零(ling)件(jian)(jian)(jian)，一般(ban)用(yong)于(yu)(yu)安裝后(hou)不常(chang)拆卸(xie)處(chu);平端(duan)(duan)緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)的(de)端(duan)(duan)頭(tou)(tou)平滑，頂(ding)(ding)緊(jin)(jin)后(hou)不損傷零(ling)件(jian)(jian)(jian)表面(mian)，用(yong)于(yu)(yu)需(xu)經常(chang)調(diao)(diao)節(jie)位置的(de)聯(lian)接(jie)處(chu)，只能傳(chuan)遞較小的(de)荷載(zai);圓柱端(duan)(duan)緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)部用(yong)在(zai)需(xu)經常(chang)調(diao)(diao)節(jie)固(gu)(gu)定(ding)(ding)(ding)(ding)位置，它能承受較大的(de)荷載(zai)作用(yong)，但防松性能差，固(gu)(gu)定(ding)(ding)(ding)(ding)時需(xu)采取防松措施;階梯(ti)肜(rong)緊(jin)(jin)定(ding)(ding)(ding)(ding)螺(luo)釘(ding)適用(yong)于(yu)(yu)壁厚(hou)較大的(de)零(ling)件(jian)(jian)(jian)固(gu)(gu)定(ding)(ding)(ding)(ding)。

6、自(zi)(zi)攻(gong)(gong)螺(luo)(luo)(luo)釘(ding) 自(zi)(zi)攻(gong)(gong)螺(luo)(luo)(luo)釘(ding)用(yong)在被(bei)聯(lian)接(jie)件上時，被(bei)聯(lian)接(jie)處(chu)可以不預先制出螺(luo)(luo)(luo)紋。在聯(lian)接(jie)時利用(yong)螺(luo)(luo)(luo)釘(ding)直(zhi)接(jie)攻(gong)(gong)出螺(luo)(luo)(luo)紋。它常用(yong)于聯(lian)接(jie)厚度較薄的金屬板。其品種有(you)錐(zhui)端自(zi)(zi)攻(gong)(gong)螺(luo)(luo)(luo)釘(ding)與平端自(zi)(zi)攻(gong)(gong)螺(luo)(luo)(luo)釘(ding)兩種。

7、自攻(gong)(gong)鎖(suo)緊(jin)螺釘 自攻(gong)(gong)鎖(suo)緊(jin)螺釘不僅具有自攻(gong)(gong)作用，而且還具有低擰(ning)入力矩(ju)和高鎖(suo)緊(jin)的(de)性能(neng)。它的(de)螺紋為三角形(xing)截面(mian)，螺釘的(de)表面(mian)經過淬硬處理，有較高的(de)硬度(du)。它的(de)螺紋規(gui)格有M2～M12