螺丝头型大全

螺絲頭型大全1.頭型碼: (參看圖一)P: 厚頭(PAN)F: 皿頭120度(FLAT)Fr: 皿頭90度(FLAT)G: P頭附單華司H: P頭附雙華司R: 圓頭(ROUND)T: 傘頭(TRUSS