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 L1 Length M C F G
Nut
H
Body
J L
6 1/8 29 10 20 12 14 20 40 49
6 1/4 32 14 23 19 14 23 46 55
6 3/8 34 14 23 24 14 25 48 57
6 1/2 36 22 28 27 14 27 55 64
8 1/8 30 10 23 12 17 21 44 53
8 1/4 33 14 23 19 17 24 47 56
8 3/8 35 14 23 24 17 26 49 58
8 1/2 37 22 28 27 17 26 56 65
10 1/8 33.5 10 23 19 19 25 46 56.5
10 1/4 33.5 14 23 19 19 25 48 56.5
10 3/8 33.5 14 23 24 19 27 50 58.5
10 1/2 37.5 22 28 27 19 29 57 65.5
12 1/4 36 14 23 19 22 25 48 59
12 3/8 38 14 23 24 22 27 50 61
12 1/2 40 22 28 27 22 29 50 68
16 1/2 41 22 28 27 27 29 57 68

Imperial Dimensions (inch)

T o/d P L1 Length M c F G Nut H Body J L
1/8 1/8 .95 .39 .75 .50 7/16 .69 1.44 1.70
1/8 1/4 1.07 .59 .88 .69 7/16 .81 1.69 1.95
3/16 1/8 .98 .39 .75 .50 1/2 .72 1.47 1.73
1/4 1/8 1.04 .39 .75 .50 9/16 .75 1.50 1.79
1/4 1/4 1.17 .59 .88 .69 9/16 .88 1.76 2.05
5/16 1/8 1.17 .39 .75 .63 5/8 .88 1.63 1.92
3/8 1/4 1.23 .59 .88 .69 11/16 .94 1.82 2.11
1/2 3/8 1.43 .59 .88 .81 7/8 1.03 1.91 2.31
1/2 1/2 1.52 .78 1.12 1.00 7/8 1.12 2.24 2.64
5/8 1/2 1.52 .78 1.12 1.00 1 1.12 2.24 2.64
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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