METAL/SPIRAL WOUND GASKETS

Engineering Data/FAQs



Flange and Bolt Dimensions
For Standard Flanges

NPS
(inches)
150 psi 300 psi
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
1/4 3-3/8 4 1/2 2-1/4 3-3/8 4 1/2 2-1/4
1/2 3-1/2 4 1/2 2-3/8 3-3/4 4 1/2 2-5/8
3/4 3-7/8 4 1/2 2-3/4 4-5/8 4 5/8 3-1/4
1 4-1/4 4 1/2 3-1/8 4-7/8 4 5/8 3-1/2
1-1/4 4-5/8 4 1/2 3-1/2 5-1/4 4 5/8 3-7/8
1-1/2 5 4 1/2 3-7/8 6-1/8 4 3/4 4-1/2
2 6 4 5/8 4-3/4 6-1/2 8 5/8 5
2-1/2 7 4 5/8 5-1/2 7-1/2 8 3/4 5-7/8
3 7-1/2 4 5/8 6 8-1/4 8 3/4 6-5/8
3-1/2 8-1/2 8 5/8 7 9 8 3/4 7-1/4
4 9 8 5/8 7-1/2 10 8 3/4 7-7/8
5 10 8 3/4 8-1/2 11 8 3/4 9-1/4
6 11 8 3/4 9-1/2 12-1/2 12 3/4 10-5/8
8 13-1/2 8 3/4 11-3/4 15 12 7/8 13
10 16 12 7/8 14-1/4 17-1/2 16 1 15-1/4
12 19 12 7/8 17 20-1/2 16 1-1/8 17-3/4
14 21 12 1 18-3/4 23 20 1-1/8 20-1/4
16 23-1/2 16 1 21-1/4 25-1/2 20 1-1/4 22-1/2
18 25 16 1-1/8 22-3/4 28 24 1-1/4 24-3/4
20 27-1/2 20 1-1/8 25 30-1/2 24 1-1/4 27
24 32 20 1-1/4 29-1/2 36 24 1-1/2 32



NPS
(inches)
400 psi 600 psi
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
1/4 3-3/8 4 1/2 2-1/4 3-3/8 4 1/2 2-1/4
1/2 3-3/4 4 1/2 2-5/8 3-3/4 4 1/2 2-5/8
3/4 4-5/8 4 5/8 3-1/4 4-5/8 4 5/8 3-1/4
1 4-7/8 4 5/8 3-1/2 4-7/8 4 5/8 3-1/2
1-1/4 5-1/4 4 5/8 3-7/8 5-1/4 4 5/8 3-7/8
1-1/2 6-1/8 4 3/4 4-1/2 6-1/8 4 3/4 4-1/2
2 6-1/2 8 5/8 5 6-1/2 8 5/8 5
2-1/2 7-1/2 8 3/4 5-7/8 7-1/2 8 3/4 5-7/8
3 8-1/4 8 3/4 6-5/8 8-1/4 8 3/4 6-5/8
3-1/2 9 8 7/8 7-1/4 9 8 7/8 7-1/4
4 10 8 7/8 7-7/8 10-3/4 8 7/8 8-1/2
5 11 8 7/8 9-1/4 13 8 1 10-1/2
6 12-1/2 12 7/8 10-5/8 14 12 1 11-1/2
8 15 12 1 13 16-1/2 12 1-1/8 13-3/4
10 17-1/2 16 1-1/8 15-1/4 20 16 1-1/4 17
12 20-1/2 16 1-1/4 17-3/4 22 20 1-1/4 19-1/4
14 23 20 1-1/4 20-1/4 23-3/4 20 1-3/8 20-3/4
16 25-1/2 20 1-3/8 22-1/2 27 20 1-1/2 23-3/4
18 28 24 1-3/8 24-3/4 29-1/4 20 1-5/8 25-3/4
20 30-1/2 24 1-1/2 27 32 24 1-5/8 28-1/2
24 36 24 1-3/4 32 37 24 1-7/8 33



NPS
(inches)
900 psi 1500 psi
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
1/2 4-3/4 4 3/4 3-1/4 4-3/4 4 3/4 3-1/4
3/4 5-1/8 4 3/4 3-1/2 5-1/8 4 3/4 3-1/2
1 5-7/8 4 7/8 4 5-7/8 4 7/8 4
1-1/4 6-1/4 4 7/8 4-3/8 6-1/4 4 7/8 4-3/8
1-1/2 7 4 1 4-7/8 7 4 1 4-7/8
2 8-1/2 8 7/8 6-1/2 8-1/2 8 7/8 6-1/2
2-1/2 9-5/8 8 1 7-1/2 9-5/8 8 1 7-1/2
3 9-1/2 8 7/8 7-1/2 10-1/2 8 1-1/8 8
4 11-1/2 8 1-1/8 9-1/4 12-1/4 8 1-1/4 9-1/2
5 13-3/4 8 1-1/4 11 14-3/4 8 1-1/2 11-1/2
6 15 12 1-1/8 12-1/2 15-1/2 12 1-3/8 12-1/2
8 18-1/2 12 1-3/8 15-1/2 19 12 1-5/8 15-1/2
10 21-1/2 16 1-3/8 18-1/2 23 12 1-7/8 19
12 24 20 1-3/8 21 26-1/2 16 2 22-1/2
14 25-1/4 20 1-1/2 22 29-1/2 16 2-1/4 25
16 27-3/4 20 1-5/8 24-1/2 32-1/2 16 2-1/2 27-3/4
18 31 20 1-7/8 27 36 16 2-3/4 30-1/2
20 33-3/4 20 2 29-1/2 38-3/4 16 3 32-3/4
24 41 20 2-1/2 35-1/2 46 16 3-1/2 39



NPS
(inches)
2500 psi
Dia. of
Flange
(inches)
No.
of
Bolts
Dia. of
Bolts
(inches)
Bolt
Circle
(inches)
1/2 5-1/4 4 3/4 3-1/2
3/4 5-1/2 4 3/4 3-3/4
1 6-1/4 4 7/8 4-1/4
1-1/4 7-1/4 4 1 5-1/8
1-1/2 8 4 1-1/8 5-3/4
2 9-1/4 8 1 6-3/4
2-1/2 10-1/2 8 1-1/8 7-3/4
3 12 8 1-1/4 9
4 14 8 1-1/2 10-3/4
5 16-1/2 8 1-3/4 12-3/4
6 19 8 2 14-1/2
8 21-3/4 12 2 17-1/4
10 26-1/2 12 2-1/2 21-1/4
12 30 12 2-3/4 24-3/8



WARNING:
Properties/application shown here are typical. Your specific application should not be undertaken without independent study and evaluation for suitability. For specific application recommendations consult Garlock. Failure to select the proper sealing products could result in property damage and/or serious personal injury.

Performance data published here has been developed from field testing, customer field reports and/or in-house testing.

While the utmost care has been used in compiling this information, we assume no responsibility for errors. Specifications subject to change without notice. This edition cancels all previous issues. Subject to change without notice.


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