Common
Square Hole Sizes
Consult factory for additional square patterns and
thinknesses.
MAX.
PLATE THICKNESS
Hole
Size
Centers
%
Open Area
M.ST.
ST.
ST.
*
3/16"
5/16"
32.7%
10
16
3/16"
7/16"
16.5%
10
10
7/32"
3/8"
30.0%
3/16"
12
*
1/4"
3/8"
45.0%
3/16"
10
1/4"
1/2"
25.0%
1/4"
10
*
5/16"
7/16"
51.0%
10
12
5/16"
15/32"
45.0%
3/16"
10
3/8"
9/16"
44.0%
3/16"
12
3/8"
5/8"
36.0%
3/16"
10
7/16"
5/8"
44.5%
3/16"
10
1/2"
5/8"
64.0%
10
14
1/2"
11/16"
53.0%
3/16"
10
1/2"
3/4"
45.0%
1/4"
10
9/16"
3/4"
56.0%
1/4"
10
5/8"
7/8"
51.0%
1/4"
10
*
3/4"
1"
56.0%
1/4"
3/16"
3/4"
1-1/8"
45.0%
3/8"
1/4"
7/8"
1-1/8"
61.0%
1/4"
10
7/8"
1-1/4"
49.0%
3/8"
1/4"
1"
ANY
#
1/2"
1/4"
1-1/6"
ANY
#
5/8"
1/4"
1-1/8"
ANY
#
5/8"
1/4"
1-3/16"
ANY
#
5/8"
1/4"
1-1/4"
ANY
#
5/8"
1/4"
1-3/8"
ANY
#
5/8"
1/4"
1-1/2"
ANY
#
5/8"
3/8"
1-9/16"
ANY
#
5/8"
3/8"
1-5/8"
ANY
#
5/8"
3/8"
1-3/4"
ANY
#
5/8"
3/8"
1-7/8"
ANY
#
5/8"
3/8"
2"
ANY
#
5/8"
3/8"
1-1/4"
ANY
#
5/8"
3/8"
2-1/2"
ANY
#
5/8"
3/8"
2-3/4"
ANY
#
5/8"
3/8"
3"
ANY
#
5/8"
3/8"
3-1/2"
ANY
#
5/8"
3/8"
3/3/4"
ANY
#
1/2"
5/16"
4"
ANY
#
1/2"
5/16"
M.ST.
= Mild Steel, St. St. = Stainless Steel
* Sizes Illustrated
# = When required bar approaches metal thickness, check
with factory for allowable minimum.
San
Francisco
1530 17th St.
San Francisco, CA
(800) 726-9473
Fax (415) 863-2635
Signal
Hill
1166 E 23rd St
Signal Hill, CA
(800) 733-3378
Fax (562) 492-6932
