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 L1 C D F G H J L Panel
Hole
Max
6 61 19 17 17 14 43 35 26 11.6 12
8 64 20 18 17 17 46 37.5 28.5 13.2 14
10 65 20.5 18 19 19 48 38 29.5 16.4 10
12 73 23 24 24 22 51 43 32 19.5 1.4
16 76.5 24 26 27 27 52.5 44.5 32.5 22.7 14
18 83 24 26 30 30 59 49.5 37.5 25.9 18
25 105 31 36 41 41 72 62 45.5 33.8 27

Imperial Dimensions (inch)

T o/d L1 C D F G
Nut
H J Body L Panel
Hole
Max
1/8 2.1 .63 .53 1/2 7/16 1.57 1.25 .97 21/64 .40
1/4 2.27 .70 .60 5/8 9/16 1.69 1.32 1.03 29/64 .40
5/16 2.39 .73 .64 11/16 5/8 1.81 1.41 1.12 33/64 .50
3/8 2.46 .76 .66 3/4 11/16 1.88 1.45 1.16 37/64 .40
1/2 2.80 .86 .90 15/16 7/8 2.00 1.65 1.25 49.64 .50
5/8 2.87 .86 .96 1 1 2.06 1.69 1.28 57/64 .50
3/4 3.11 .86 .96 13/16 1-1/8 2.31 1.87 1.47 1.1/16 .67
1 3.75 1.04 1.23 1-5/8 1-1/2 2.81 2.26 1.78 1-21/64 .88
Features
  • 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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