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G.I. Fitting Series

T-Lok Fittings offer maximum sealing reliability adapting double ferrule design for separate sealing
and tube gripping functions in applications for general industries including research, analytical ,
process instrumentation, bioprocessing, oil & gas, power, petrochemical,
ocean plant, shipbuilding, and semiconductor industries
with easy installation, assembly and maintenance.

Nut (TFN)

METRIC
Part Number A
Tube O.D.
W
Hex.flat
L
mm mm mm
TFN-2M 2 12 11.9
TFN-3M 3 12 11.9
TFN-4M 4 12 11.9
TFN-6M 6 14 12.7
TFN-8M 8 16 13.5
TFN-10M 10 19 15.1
TFN-12M 12 22 17.4
TFN-14M 14 25 17.4
TFN-15M 15 25 17.4
TFN-16M 16 25 17.4
TFN-18M 18 30 17.4
TFN-20M 20 32 17.4
TFN-22M 22 32 17.4
TFN-25M 25 38 20.6
INCH
Part Number A
Tube O.D.
W
Hex.flat
L
in mm in mm in mm
TFN-1 1/16 1.58 5/16 7.9 0.31 7.87
TFN-2 1/8 3.17 7/16 11.1 0.47 11.93
TFN-3 3/16 4.76 1/2 12.7 0.47 11.93
TFN-4 1/4 6.35 9/16 14.3 0.50 12.70
TFN-5 5/16 7.93 5/8 15.9 0.53 13.46
TFN-6 3/8 9.52 11/16 17.5 0.56 14.20
TFN-8 1/2 12.70 7/8 22.2 0.69 17.50
TFN-10 5/8 15.87 1 25.4 0.69 17.52
TFN-12 3/4 19.05 1-1/8 28.6 0.69 17.50
TFN-14 7/8 22.22 1-1/4 31.8 0.69 17.52
TFN-16 1 25.40 1-1/2 38.1 0.81 20.57
Tube OD
Dimensions, in
1/16 TNFS-1
1/8 TNFS-2
3/16 TNFS-3
1/4 TNFS-4
5/16 TNFS-5
3/8 TNFS-6
1/2 TNFS-8
5/8 TNFS-10
3/4 TNFS-12
7/8 TNFS-14
1 TNFS-16
NUT-FERRULE SET To order, Please see the table of ordering number. Please order Nut-Ferrule Sets in multiples of live.
Ordering Number
Dimensions, mm
2 TNFS-2M
3 TNFS-3M
4 TNFS-4M
6 TNFS-6M
8 TNFS-8M
10 TNFS-10M
12 TNFS-12M
14 TNFS-14M
15 TNFS-15M
16 TNFS-16M
18 TNFS-18M
20 TNFS-20M
22 TNFS-22M
25 TNFS-25M
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice.