不銹鋼 大扁頭 十字 鐵板 牙螺絲

長度→	1/4''	3/8''	1/2''	5/8''	3/4''	1''	1-1/4''	1-1/2''	2''	2-1/2''	3''
牙徑↓	6.4	9.5	12.7	15.9	19.1	25.4	31.8	38.1	50.8	63.5	76.2
1/8''	◎	◎	◎	◎	◎	◎	◎
5/32''	◎	◎	◎	◎	◎	◎	◎	◎	◎	◎	◎
3/16''		◎	◎	◎	◎	◎	◎	◎	◎	◎	◎
1/4''					◎	◎	◎	◎	◎	◎	◎

49 不銹鋼螺絲螺帽