Port Size & Bolt Size Charts

  • SAE O-Ring
  • JIC 37°
  • Code 61 Flange
  • Code 62 Flange
  • NPT
  • Unified Bolt
  • Metric Bolt
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DASH NO.
SIZE
(nominal)
O.D.
(inch)
O.D.
(inch)
TPI
(thread/inch)
2
1/8"
5/16"
0.3125
27
3
3/16"
3/8"
0.375
24
4
1/4"
7/16"
0.4375
20
5
5/16"
1/2"
0.500
20
6
3/8"
9/16"
0.5625
18
8
1/2"
3/4"
0.750
16
10
5/8"
7/8"
0.875
14
12
3/4"
1-1/16"
1.0625
12
14
7/8"
1-3/16"
1.1875
12
16
1"
1-5/16"
1.3125
12
20
1-1/4"
1-5/8"
1.625
12
24
1-1/2"
1-7/8"
1.875
12
32
2"
2-1/2"
2.500
12
DASH NO.
SIZE
(nominal)
O.D.
(inch)
O.D.
(inch)
TPI
(thread/inch)
2
1/8"
5/16"
0.3125
27
3
3/16"
3/8"
0.375
24
4
1/4"
7/16"
0.4375
20
5
5/16"
1/2"
0.500
20
6
3/8"
9/16"
0.5625
18
8
1/2"
3/4"
0.750
16
10
5/8"
7/8"
0.875
14
12
3/4"
1-1/16"
1.0625
12
14
7/8"
1-3/16"
1.1875
12
16
1"
1-5/16"
1.3125
12
20
1-1/4"
1-5/8"
1.625
12
24
1-1/2"
1-7/8"
1.875
12
32
2"
2-1/2"
2.500
12
DASH NO.
SIZE
(nominal)
Port I.D.
(inch)
O-Ring
Size
Bolt Thread
Bolt Pattern
(minor)
Bolt Pattern
(major)
8
1/2"
0.500
-210
5/16 - 18
0.688
1.500
12
3/4"
0.750
-214
3/8 - 16
0.875
1.875
16
1
1.000
-219
3/8 - 16
1.031
2.063
20
1-1/4"
1.250
-222
7/16 - 14
1.188
2.313
24
1-1/2"
1.500
-225
1/2 - 13
1.406
2.750
32
2"
2.000
-228
1/2 - 13
1.688
3.063
40
2-1/2"
2.500
-232
1/2 - 13
2.000
3.500
48
3"
3.000
-237
5/8 - 11
2.438
4.188
56
3-1/2"
3.500
-241
5/8 - 11
2.750
4.750
64
4"
4.000
-245
5/8 - 11
3.062
5.125
80
5"
5.000
-253
5/8 - 11
3.625
6.000
DASH NO.
SIZE
(nominal)
Port I.D.
(in)
O-Ring
Size
Bolt Thread
Bolt Pattern
(minor)
Bolt Pattern
(major)
8
1/2"
0.500
-210
5/16 - 18
0.718
1.594
12
3/4"
0.750
-214
3/8 - 16
0.937
2.000
16
1
1.000
-219
7/16 - 14
1.093
2.250
20
1-1/4"
1.250
-222
1/2 - 13
1.250
2.625
24
1-1/2"
1.500
-225
5/8 - 11
1.437
3.125
32
2"
2.000
-228
3/4 - 10
1.750
3.812
DASH NO.
SIZE
(nominal)
​TPI
(thread/inch)
O.D.
(in)
1
1/16"
27
0.3125
2
1/8"
27
0.405
4
1/4"
18
0.540
6
3/8"
18
0.675
8
1/2"
14
0.840
12
3/4"
14
1.050
16
1"
11-1/2
1.315
20
1-1/4"
11-1/2
1.660
24
1-1/2"
11-1/2
1.900
32
2"
11-1/2
2.375
40
2-1/2"
8
2.875
48
3"
8
3.500
56
3-1/2"
8
4.000
64
4"
8
4.500
80
5"
8
5.563
96
6"
8
6.625
NO.
DIAMETER
(in)
COARSE TPI
(thread/inch)
FINE TPI
(thread/inch)
#0
0.060"
-
80
#1
0.073"
64
72
#2
0.086"
56
64
#3
0.099"
48
56
#4
0.112"
40
48
#5
0.125"
40
44
#6
0.138"
32
40
#8
0.164"
32
36
#10
0.190"
24
32
#12
0.216"
24
28
-
1/4"
20
28
-
5/16"
18
24
-
3/8"
16
24
-
7/16"
14
20
-
1/2"
13
20
-
9/16"
12
18
-
5/8"
11
18
-
3/4"
10
16
-
7/8"
9
14
-
1"
8
14
-
1-1/8"
7
12
-
1-1/4"
7
12
-
1-1/2"
6
12
-
1-3/4"
5
-
-
2"
4-1/2
-
-
2-1/4"
4-1/2
-
-
2-1/2"
4
-
-
2-3/4"
4
-
-
3"
4
-
DIAMETER (mm)
COARSE
Pitch (mm)
FINE
Pitch (mm)
Alt. FINE
Pitch (mm)
1
0.25
-
-
1.2
0.25
-
-
1.4
0.30
-
-
1.6
0.35
-
-
1.8
0.35
-
-
2
0.40
-
-
2.2
0.45
-
-
2.5
0.45
-
-
3
0.50
-
-
3.5
0.60
-
-
4
0.70
-
-
5
0.80
-
-
6
1.00
-
-
7
1.00
-
-
8
1.25
1.00
-
10
1.50
1.00
1.25
11
1.50
1.00
-
12
1.75
1.25
1.50
14
2.00
1.50
-
15
-
1.00
-
16
2.00
1.50
-
18
2.50
1.50
-
20
2.50
1.50
-
22
2.50
1.50
-
24
3.00
2.00
-
25
-
1.50
-
26
-
1.50
-
27
3.00
2.00
-
28
-
2.00
-
30
3.50
2.00
-
33
3.50
2.00
-
36
4.00
3.00
-
39
4.00
3.00
-
42
4.50
3.00
-
45
4.50
3.00
-
48
5.00
3.00
-
52
5.00
3.00
-
56
5.50
4.00
-
60
5.50
4.00
-
64
6.00
4.00
-
68
6.00
4.00
-
72
-
6.00
-
76
-
6.00
-
80
-
6.00
-
85
-
 6.00
-
90
-
6.00
-
95
-
6.00
-
100
-
​6.00
-