Key Brick Unit Requirements - 8" Series

8 x 3-3/4 x 2-1/4 INCH KEY BRICK
Inside DiameterNo. 4 KeyNo. 3 KeyNo. 2 KeyNo. 1 KeyStrts.Total
1'6"29----29
2'0"2015---35
2'6"1030---40
3'0"-44---44
3'6"-3416--50
4'0"-3025--55
4'6"-1941--60
5'0"-1055--65
5'3"--67--67
5'6"--655-70
6'0"--6015-75
6'6"--5525-80
7'0"--5035-85
7'6"--4545-90
8'0"--4055->95
8'6"--3565-100
9'0"--3075-105
9'6"--2585-110
10'0"--2095-115
10'6"--15105-120
>11'0"-->10115-125
11'6"--5125-130
12'0"---135-135
12'6"---1355140
13'0"---13510145
13'6"---13515150
14'0"---13520155
14'6"---13525160
15'0"---13530165
15'6"---13535170
16'0"---13540175
16'6"---13545180
17'0"---13550185
17'6"---13555190
18'0"---13560195
18'6"---13565200
19'0"---13570205
19'6"---13575210
20'0"---13580215
20'6"---13585220
21'0"---13590225
21'6"---13595230
22'0"---135100235
22'6"---135105240
23'0"---135110245
23'6"---135115250
24'0"---135120255
24'6"---135125260
25'0"---135130265