螺栓規(guī)格定義與認識

1、螺栓規(guī)格定義與認識一.螺紋種類:A:三角螺紋(60度):結合鎖緊B:管用三角螺紋(55度):結合鎖緊C:梯形螺紋(3029度):動力傳動D:方螺紋(90度):動力傳動二.常用螺絲種類:A:MachineScrew:機械螺絲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:a.LowCarbonSteel:低碳鋼b.SS304:StainlessSteel304c.SS302:StainlessSteel302:結構韌性較好d.Aluminum5052:鋁合金5052d.Brass:黃銅e.Bronze:青銅f.UNSC11000Copper:銻銅四.常見螺絲規(guī)格與標示:A:公制螺絲B:美規(guī)螺絲C:英制螺絲A:公制機械螺絲:M

3、etricEx:M3x6–PPB:M3機械螺絲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DriveCode:頭部剖溝特征型號LengthCode:螺絲長度(mm)A1:ThreadCode:螺絲型號公制螺絲直接以螺絲外徑標示螺絲型號如M3即螺絲外徑為3.00mm.M4即螺絲外徑為4.00mm.MetricThreadSizexPitch:a.一般以番號標示如#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LengthCode:螺絲長度ThreadCode:螺絲型號B1:ThreadCode:螺絲型號一般常用規(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:標示方式與公制相同.C:英制螺絲:C1:ThreadCode:標示皆將分母為8再直接稱分子之番號.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:有時會標示粗牙或細牙.UNF:細牙:電子業(yè)較常用.UNC:粗牙:重機械結構較常用.Ex:38x0.50UNF–PPB:3分細牙螺絲x0