鐵製水泥螺絲

牙徑		1/4''	5/16''
長度	換算
1-1/4''	31.8	◎
1-1/2''	38.1	◎
1-3/4''	44.5	◎	◎
2''	50.8	◎	◎
2-1/2''	63.5	◎	◎
3''	76.2	◎	◎
3-1/2''	88.9	◎
4''	101.6	◎

48 鐵螺絲螺帽