螺栓規(guī)格定義與認(rèn)識(shí)

1、螺栓規(guī)格定義與認(rèn)識(shí)一.螺紋種類:A:三角螺紋(60度):結(jié)合鎖緊B:管用三角螺紋(55度):結(jié)合鎖緊C:梯形螺紋(3029度):動(dòng)力傳動(dòng)D:方螺紋(90度):動(dòng)力傳動(dòng)二.常用螺絲種類:A:MachineScrew:機(jī)械螺絲B:TappingScrew:自攻螺絲(分使用于金屬與使用于塑料二種)B1:SheetMetalTappingScrew.(鐵板牙自攻螺絲)B2:PlasticTappingScrew.(塑料用自攻螺絲)C:Woode

2、nScrew:木工螺絲D:DrywallScrew:水泥墻螺絲三.常見螺絲材質(zhì):a.LowCarbonSteel:低碳鋼b.SS304:StainlessSteel304c.SS302:StainlessSteel302:結(jié)構(gòu)韌性較好d.Aluminum5052:鋁合金5052d.Brass:黃銅e.Bronze:青銅f.UNSC11000Copper:銻銅四.常見螺絲規(guī)格與標(biāo)示:A:公制螺絲B:美規(guī)螺絲C:英制螺絲A:公制機(jī)械螺絲:M

3、etricEx:M3x6–PPB:M3機(jī)械螺絲6mm長十字圓扁頭鍍黑.FinishCode:外觀處理規(guī)格HeadCode:頭部外型ThreadCode螺絲型號(hào)DriveCode:頭部剖溝特征型號(hào)LengthCode:螺絲長度(mm)A1:ThreadCode:螺絲型號(hào)公制螺絲直接以螺絲外徑標(biāo)示螺絲型號(hào)如M3即螺絲外徑為3.00mm.M4即螺絲外徑為4.00mm.MetricThreadSizexPitch:a.一般以番號(hào)標(biāo)示如#256#

4、440#632#832#1024…etc.b.或以英制外徑表示如0.086560.112400.138320.164320.19024…etc.Ex:632–8–PPB:FinishCode:外觀處理規(guī)格HeadCode:頭部外型DriveCode:頭部剖溝特征型號(hào)LengthCode:螺絲長度ThreadCode:螺絲型號(hào)B1:ThreadCode:螺絲型號(hào)一般常用規(guī)格如下:a.#256(0.08656):2番56牙b#440(0.1

5、1240):4番40牙c.#632(0.13832):6番32牙d.#832(0.16432):8番32牙e.#1024(0.19024):10番24牙牙為每吋之牙數(shù).B2:LengthCode:螺絲長度美規(guī)螺絲長度須經(jīng)換算才是公制mm尺寸.換算公式:(LengthCode32)x25.40=公制長度mmB3B4B5:標(biāo)示方式與公制相同.C:英制螺絲:C1:ThreadCode:標(biāo)示皆將分母為8再直接稱分子之番號(hào).Ex:18x0.50–

6、PPB:1分牙螺絲x0.50”長PPBEx:516x0.50–PPB=2.58x0.50PPB:2分半牙螺絲x0.50”長PPBEx:532x0.50–PPB=1.258x0.50PPB:1分2厘半螺絲x0.50”長PPBEx:14x0.50PPB=28x0.50PPB:2分牙螺絲x0.50”長PPB注:有時(shí)會(huì)標(biāo)示粗牙或細(xì)牙.UNF:細(xì)牙:電子業(yè)較常用.UNC:粗牙:重機(jī)械結(jié)構(gòu)較常用.Ex:38x0.50UNF–PPB:3分細(xì)牙螺絲x0