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)

T o/d P M F H
6 1/8 10 14 32
6 1/4 15 14 37
6 3/8 16 19 38
6 1/2 20 22 42
8 1/8 10 12 33
8 1/4 15 14 38
8 3/8 16 19 39
8 1/2 20 22 43
10 1/8 10 12 34
10 1/4 15 14 39
10 3/8 16 19 40
10 1/2 20 22 46
12 1/4 15 14 44
12 3/8 16 19 45
12 1/2 20 22 51
16 3/8 16 19 48
16 1/2 20 22 52
16 3/4 21 27 53
25 3/4 21 27 60
25 1 25 36 65

Imperial Dimensions (inch)

T o/d P M F H
1/8 1/8 .38 1/2 1-1/8
1/8 1/4 .56 9/16 1-5/16
1/4 1/8 .38 7/16 1-7/32
1/4 1/4 .56 9/16 1-13/32
1/4 3/8 .56 9/16 1-7/16
1/4 1/2 .75 15/16 1-21/32
5/16 1/4 .56 9/16 1-15/32
5/16 3/8 .56 11/16 1-15/32
3/8 1/4 .56 9/16 1-1/2
3/8 3/8 .56 11/16 1-1/2
3/8 1/2 .75 15/16 1-11/16
1/2 1/4 .56 1/2 1-11/16
1/2 3/8 .56 11/16 1-3/4
1/2 1/2 .75 15/16 1-15/16
5/8 3/8 .56 11/16 1-13/16
5/8 1/2 .75 15/16 2
5/8 3/4 .75 1-1/16 2-1/32
3/4 1/2 .75 15/16 2
3/4 3/4 .75 1-1/16 2-1/32
3/4 1 .94 1-3/8 2-9/32
1 3/4 .75 1-1/16 2-9/32
1 1 .94 1-3/8 2-9/16
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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