Stainless Steel
  Buttweld Fittings
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Flanges
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Buttweld Fittings
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Flanges
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  Socket Weld
   & Threaded Fittings
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Copper
  Tube
Fittings
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Structural Shapes
Shapes
Sanitary/High Purity
Industrial Engineered

Standard Cast Iron Companion Flanges and Bolts
(for working pressures up to 125 psi steam, 175 psi WOG)

Size

Flange
Diam.

Bolt
Circle

 Nbr. of
Bolts

Bolt
Size

Bolt
Length
0.75 3.500 2.500 4 0.375 1.375
1.00 4.250 3.125 4 0.500 1.500
1.25 4.625 3.500 4 0.500 1.500
1.50 5.000 3.875 4 0.500 1.750
2.00 6.000 4.750 4 0.625 2.000
2.50 7.000 5.500 4 0.625 2.750
3.00 7.500 6.000 4 0.625 2.500
3.50 8.500 7.000 8 0.625 2.500
4.00 9.000 7.500 8 0.625 2.750
5.00 10.000 8.500 8 0.750 3.000
6.00 11.000 9.500 8 0.750 3.000
8.00 13.500 11.750 8 0.750 3.250
10.00 16.000 14.250 12 0.875 3.500
12.00 19.000 17.000 12 0.875 3.750
14.00 21.000 18.750 12 1.000 4.250
16.00 23.500 21.250 16 1.000 4.250
 
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