Submittal Sheet

A.S.A Flanged Fittings
Class 300 Cast Iron Flanges
Dimensions of Cast Iron Flanges, and Bolts
Nominal
Pipe Size
Diam. of
Flange
Thickness of
Flanges (Min.)
Diam. of Bolt
Circle
Number
of Bolts
Diam. of
Bolts
Diam. of
Bolt Holes
Length of
Bolts
1/2 3 3/4 - 2.62 4 0.50 0.62 -
3/4 4 5/8 - 3.25 4 0.62 0.75 -
1 4 7/8 - 3.50 4 0.62 0.75 -
1 1/4 - - 3.88 4 0.62 0.75 -
1 1/2 6 1/8 - 4.50 4 0.75 0.88 -
2 6 1/2 5/8 5.00 8 0.62 0.75 3
2 1/2 7 1/2 3/4 5.88 8 0.75 0.88 3 1/4
3 8 1/4 3/4 6.62 8 0.75 0.88 3 1/2
3 1/2 - - 7.25 8 0.75 0.88 -
4 10 3/4 7.88 8 0.75 0.88 3 3/4
5 11 3/4 9.25 8 0.75 0.88 4
6 12 1/2 3/4 10.62 12 0.75 0.88 4 1/4
8 15 7/8 13.00 12 0.88 1.00 4 3/4
10 17 1/2 - 15.25 16 1.00 1.12 -
12 20 1/2 -
17.75 16 1.12 1.25 -
14 23 - 20.25 20 1.12 1.25 -
16 25 1/2 - 22.50 20 1.25 1.38 -
18 28 - 24.75 24 1.25 1.38 -
20 30 1/2 - 27.00 24 1.25 1.38 -
24 36 - 32.00 24 1.50 1.62 -
All dimensions given in inches.
Nominal Dia
(in)
Threads
per inch
Clamp
Load
(Lbs)
ASTM A307 Grade A
Tightening Torque
K = 0.15
(Lubricated)
K = 0.17
(Plated)
K = 0.20
(Plain)
1/2" 13 3831 24 27 32
5/8" 11 6102 48 54 64
3/4" 10 9030 85 96 113
7/8" 9 12467 136 155 182
Tightening Torque Values
Flange Compatibility Chart • Spec Sheet