螺(luo)絲釘是(shi)由頭部(bu)和螺(luo)桿兩部(bu)分構成的一(yi)類常(chang)(chang)用(yong)(yong)緊固(gu)件，主要(yao)用(yong)(yong)來連接固(gu)定零(ling)件，大多是(shi)起到緊固(gu)和便于安裝(zhuang)拆卸的作用(yong)(yong)。隨著螺(luo)釘在我們(men)日常(chang)(chang)生(sheng)活中使用(yong)(yong)越(yue)(yue)來越(yue)(yue)廣泛，除了(le)對其(qi)優點的認同外，人們(men)開始(shi)關注其(qi)分類及規格型(xing)號。

螺絲釘種類：

1、開槽普通(tong)螺釘(ding)(ding) 多用(yong)于較(jiao)小零件(jian)的(de)連接(jie)。它(ta)有盤頭(tou)(tou)螺釘(ding)(ding)、圓(yuan)柱頭(tou)(tou)螺釘(ding)(ding)、半沉(chen)頭(tou)(tou)螺釘(ding)(ding)和(he)(he)沉(chen)頭(tou)(tou)螺釘(ding)(ding)。盤頭(tou)(tou)螺釘(ding)(ding)和(he)(he)圓(yuan)柱頭(tou)(tou)螺釘(ding)(ding)的(de)釘(ding)(ding)頭(tou)(tou)強(qiang)度(du)較(jiao)高，瑁(mao)在普通(tong)的(de)部(bu)件(jian)連接(jie)上(shang);半沉(chen)頭(tou)(tou)螺釘(ding)(ding)的(de)頭(tou)(tou)部(bu)呈弧形，安裝(zhuang)后(hou)它(ta)的(de)頂端(duan)略外(wai)露，且美(mei)觀(guan)光(guang)滑，一般用(yong)于儀器(qi)或精密(mi)機械上(shang);沉(chen)頭(tou)(tou)螺釘(ding)(ding)則用(yong)于不允許釘(ding)(ding)頭(tou)(tou)露出的(de)地(di)方。

2、內六角(jiao)及內六角(jiao)花(hua)形(xing)螺釘 這類(lei)螺釘的頭部能埋入構件中，可施(shi)加較(jiao)大的扭矩(ju)，連接(jie)強度較(jiao)高，可代替(ti)六角(jiao)螺栓。常(chang)用于結(jie)構要求緊湊，外觀平滑(hua)的聯接(jie)處。

3、十字槽(cao)普(pu)通螺(luo)釘 它與開槽(cao)普(pu)通螺(luo)釘的使(shi)用(yong)功能相(xiang)似，可互(hu)相(xiang)代換，但十字槽(cao)普(pu)通螺(luo)釘的槽(cao)形(xing)強度較高，不易擰禿，外(wai)形(xing)較為美觀。使(shi)用(yong)時須用(yong)與之配套的十字形(xing)旋具(ju)進行(xing)裝卸。

4、吊(diao)環(huan)(huan)螺(luo)釘(ding) 吊(diao)環(huan)(huan)螺(luo)釘(ding)是供(gong)安裝和運輸時承重(zhong)的(de)一種五金(jin)配件(jian)。使用(yong)時螺(luo)釘(ding)須旋進至使支承面(mian)緊(jin)密貼合的(de)位(wei)置，不準使用(yong)工具扳緊(jin)，也(ye)不允許(xu)有垂直于吊(diao)環(huan)(huan)平面(mian)的(de)荷載作(zuo)用(yong)在上(shang)面(mian)。

5、緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding) 緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)用(yong)于固(gu)(gu)定(ding)(ding)(ding)機件的(de)(de)相對位(wei)置。把緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)旋入(ru)待緊(jin)(jin)(jin)定(ding)(ding)(ding)的(de)(de)零(ling)(ling)件的(de)(de)螺(luo)(luo)孔中，以(yi)其末端(duan)(duan)緊(jin)(jin)(jin)壓在另一(yi)零(ling)(ling)件的(de)(de)表面(mian)上，即把前一(yi)零(ling)(ling)件固(gu)(gu)定(ding)(ding)(ding)在后(hou)一(yi)零(ling)(ling)件上。 緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)通常(chang)由鋼或不(bu)(bu)銹(xiu)鋼材料制造，它的(de)(de)端(duan)(duan)頭(tou)形(xing)狀有錐(zhui)形(xing)、凹形(xing)、平頭(tou)形(xing)、圓柱形(xing)和階梯形(xing)等。錐(zhui)端(duan)(duan)或凹端(duan)(duan)緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)的(de)(de)端(duan)(duan)頭(tou)直接(jie)頂緊(jin)(jin)(jin)零(ling)(ling)件，一(yi)般(ban)用(yong)于安裝后(hou)不(bu)(bu)常(chang)拆卸處;平端(duan)(duan)緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)的(de)(de)端(duan)(duan)頭(tou)平滑，頂緊(jin)(jin)(jin)后(hou)不(bu)(bu)損傷零(ling)(ling)件表面(mian)，用(yong)于需(xu)經常(chang)調節位(wei)置的(de)(de)聯接(jie)處，只(zhi)能傳遞(di)較小(xiao)的(de)(de)荷(he)載(zai)(zai);圓柱端(duan)(duan)緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)部(bu)用(yong)在需(xu)經常(chang)調節固(gu)(gu)定(ding)(ding)(ding)位(wei)置，它能承受較大的(de)(de)荷(he)載(zai)(zai)作(zuo)用(yong)，但防(fang)(fang)松性能差，固(gu)(gu)定(ding)(ding)(ding)時(shi)需(xu)采取(qu)防(fang)(fang)松措施;階梯肜緊(jin)(jin)(jin)定(ding)(ding)(ding)螺(luo)(luo)釘(ding)(ding)適用(yong)于壁厚較大的(de)(de)零(ling)(ling)件固(gu)(gu)定(ding)(ding)(ding)。

6、自(zi)攻(gong)(gong)(gong)螺釘(ding)(ding) 自(zi)攻(gong)(gong)(gong)螺釘(ding)(ding)用在(zai)被聯(lian)接(jie)(jie)件上時，被聯(lian)接(jie)(jie)處(chu)可(ke)以不預先制(zhi)出螺紋。在(zai)聯(lian)接(jie)(jie)時利用螺釘(ding)(ding)直接(jie)(jie)攻(gong)(gong)(gong)出螺紋。它常用于聯(lian)接(jie)(jie)厚(hou)度較(jiao)薄的金屬(shu)板(ban)。其(qi)品種有錐端自(zi)攻(gong)(gong)(gong)螺釘(ding)(ding)與平端自(zi)攻(gong)(gong)(gong)螺釘(ding)(ding)兩種。

7、自攻(gong)鎖緊(jin)螺(luo)釘(ding) 自攻(gong)鎖緊(jin)螺(luo)釘(ding)不僅具有(you)(you)(you)自攻(gong)作用，而(er)且(qie)還具有(you)(you)(you)低擰入力矩和(he)高鎖緊(jin)的性能。它的螺(luo)紋(wen)為三角形截面(mian)，螺(luo)釘(ding)的表面(mian)經過淬(cui)硬處理，有(you)(you)(you)較(jiao)高的硬度。它的螺(luo)紋(wen)規格有(you)(you)(you)M2～M12