General Details

Double Ferrule Stainless Steel Compression Fittings have been designed and developed to meet the demands for reliability and high precision standards. The Alco-Lok range includes Imperial and Metric sizes (see data sheets for all sizes).

Metric Dimensions (mm)

p T
o/d
L1
Length
M C D F G
Nut
H
Body
N
1/8 6 35 10 19 17 14 14 26 11.3
1/4 6 40 15 19 17 14 14 31 12.7
3/8 6 43 16 19 17 19 14 34 15.6
1/2 6 48 20 19 17 22 14 38 16.4
1/8 8 36 10 20 18 14 17 27 11.5
1/4 8 41 15 20 18 14 17 32 12.9
1/8 10 37 10 20.5 18 17 19 28.5 12.3
1/4 10 41.5 15 20.5 18 17 19 33 13.2
3/8 10 44.5 16 20.5 18 19 19 36 16.1
1/2 10 48.5 20 20.5 18 22 19 40 16.9
3/4 10 50.5 21 20.5 18 27 19 42 18.6
1/4 12 46 15 23 24 22 22 35 12
3/8 12 47 16 23 24 22 22 36 12.9
1/2 12 51 20 23 24 22 22 40 13.7
3/4 12 53 21 23 24 27 22 42 15.4
3/8 16 48 16 24 26 21 27 36 11.3
1/2 16 52 20 24 26 24 27 40 12.1
3/4 16 54 21 24 26 27 27 42 13.8
1/2 18 52 20 24 26 27 30 40 12.1
3/4 18 54 21 24 26 27 30 42 13.8
1 18 58 25 24 26 36 30 46 14.3
3/4 25 62.5 21 31 36 36 21 46 12.9
1 25 66.5 25 31 36 36 41 50 13.4

Imperial Dimensions (inch)

T o/d P L1
Length
M C D F G
Nut
H
Body
N
1/8 1/8 1.19 .38 .63 .53 1/2 7/16 .91 .41
1/8 1/4 1/4 .56 .63 .53 9/16 7/16 1.13 .50
3/16 1/8 1.21 .38 .63 .54 7/16 1/2 .95 .43
3/16 1/4 1.42 .56 .63 .54 9/16 1/2 1.16 .54
1/4 1/8 1.29 .38 .70 .60 1/2 9/16 1.00 .45
1/4 1/4 1.50 .56 .70 .60 9/16 9/16 1.19 .50
1/4 3/8 1.51 .56 .70 .60 11/16 9/16 1.19 .56
1/4 1/2 1.73 .75 .70 .60 7/8 9/16 1.44 .67
5/16 1/8 1.34 .38 .73 .64 9/16 5/8 1.05 .46
5/16 1/4 1.52 .56 .73 .64 9/16 5/8 1.23 .54
3/8 1/8 1.38 .38 .76 .66 5/8 11/16 1.09 .48
3/8 1/4 1.57 .56 .76 .66 5/8 11/16 1.28 .57
3/8 3/8 1.57 .56 .66 .66 11/16 11/16 1.28 .56
3/8 1/2 1.79 .75 .76 .66 7/8 11/16 1.50 .67
3/8 3/4 1.82 .75 .76 .66 1-1/16 11/16 1.53 .68
1/2 1/4 1.71 .56 .86 .90 13/16 7/8 1.31 .47
1/2 3/8 1.71 .56 .86 .90 13/16 7/8 1.31 .46
1/2 1/2 1.90 .75 .86 .90 7/8 7/8 1.50 .54
1/2 3/4 1.93 .75 .86 .90 1-1/16 7/8 1.53 .55
5/8 3/8 1.74 .56 .86 .96 15/16 1 1.34 .43
5/8 1/2 1.93 .75 .86 .96 15/16 1 1.53 .51
5/8 3/4 1.93 .75 .86 .96 1-1/16 1 1.53 .49
3/4 1/2 1.99 .75 .86 .96 1-1/16 1-1/8 1.59 .57
3/4 3/4 1.99 .75 .86 .96 1-1/16 1-1/8 1.59 .55
3/4 1 2.21 .94 .86 .96 1-3/8 1-1/8 1.81 .68
1 3/4 2.26 .75 1.04 1.23 1-3/8 1-1/2 1.78 .55
1 1 2.45 .94 1.04 1.23 1-3/8 1-1/2 1.97 .65
Description
  • All components from the same material
  • High pressure applications
  • Seal pressures that will burst the tubing
  • Impulse and vibration resistant
  • Repeated make and break connections
  • Nut threads are silver plated to prevent galling
  • No tube rotation or torque transmission on make up
Materials
Ali Bronze – NES 833 Alloy C276 / C22 Alloy 20 Alloy 400
Alloy 625 Alloy 825 F44 (S31254) F51 (S31803)
F53 (S32750) F55 (S32760) Titanium 904L
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