釬具類型釬頭直徑合金片（柱）（mm）螺紋水孔系列號(hào)mmin邊齒芯齒邊齒角球齒釬頭平面型標(biāo)準(zhǔn)式3811/2"4×82×830°25R3Q638-25R41139/64"4×82×830°25R3Q641-25R42121/32"4×82×830°25R3Q642-25R45149/64"4×82×830°25R3Q645-25R48157/64"4×82×830°25R3Q648-25R512"4×82×830°25R3Q651-25R3811/2"4×82×830°28R3Q638-28R41139/64"4×82×830°28R3Q641-28R42121/32"4×82×830°28R3Q642-28R45149/64"4×82×830°28R3Q645-28R48157/64"4×82×830°28R3Q648-28R512"4×82×830°28R3Q651-28R3811/2"4×82×830°32R3Q638-32R