CHART SHOWING DESCRIPTION OF ROUND AND LONG HOLE
METAL PERFORATED SHEETS-NOS.
EQUIVALENT TO MM HOLE DIAMETERS.
ROUND HOLE
LONG HOLE
No.
Dia Hole In
Size In mm.
Inch.
mm.
Ordinary
BSS
3
0.70
8 1/4
2.30
12 1/4
5.50
1
.80
1.00
5
5.00
4
0.80
8 1/2
3/32
2.40
12 1/2
7/32
5.60
1 1/4
…..
1.25
5 1/4
4 1/2
0.90
8 3/4
2.50
12 3/4
6.00
1 1/2
1.50
5 1/2
9
7/64
2.60
13
1/4
6.35
1 3/4
1.60
5 3/4
6.50
1.10
9 1/4
2.75
13 1/2
9/32
7.13
2
1.75
6
7.00
1.20
9 1/2
3.00
12
5/16
7.90
2 1/4
1.40
1.85
1.30
9 3/4
3.10
11/32
8.80
2 1/2
2.00
10
1/8
3.25
15
3/8
9.50
2 3/4
1.80
2.25
6 1/4
10 1/4
3.50
15 1/2
13/32
10.30
6 1/2
1/16
10 1/2
3.80
16
7/16
11.10
3 1/4
6 3/4
1.70
10 3/4
5/32
4.00
17
1/2
12.70
3 1/2
2.80
7
11
4.35
5/8
15.90
3 3/4
3.20
7 1/4
1.90
11 1/4
4.50
3/4
19.00
7 1/2
5/64
11 1/2
3/16
4.75
7/8
22.25
4 1/4
3.90
3.75
7 3/4
2.10
11 3/4
25.40
4.30
8
2.20
5.15
1 1/8
28.00
4 3/4
4.70