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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.

Female Connector (TFC)

TUBE (METRIC) TO FEMALE NPT THREAD
Part Number A
Tube O.D.
T
NPT
D W
Hex. flat
N L I
mm in mm mm mm mm mm
TFC-3M-2N 3 1/8 2.4 14 22.1 28.7 12.7
TFC-3M-4N 3 1/4 2.4 19 26.9 33.5 12.7
TFC-4M-2N 4 1/8 2.4 14 23.1 29.7 13.7
TFC-6M-2N 6 1/8 4.8 14 23.9 31.3 15.3
TFC-6M-4N 6 1/4 4.8 19 28.4 35.8 15.3
TFC-6M-6N 6 3/8 4.8 22 30.2 37.6 15.3
TFC-6M-8N 6 1/2 4.8 27 35.1 42.5 15.3
TFC-8M-2N 8 1/8 6.4 15 24.6 32.1 16.2
TFC-8M-4N 8 1/4 6.4 19 29.5 37.0 16.2
TFC-8M-6N 8 3/8 6.4 22 31.0 38.5 16.2
TFC-8M-8N 8 1/2 6.4 27 35.8 43.3 16.2
TFC-10M-4N 10 1/4 7.9 19 30.2 37.8 17.2
TFC-10M-6N 10 3/8 7.9 22 31.8 39.4 17.2
TFC-10M-8N 10 1/2 7.9 27 36.6 44.2 17.2
TFC-12M-4N 12 1/4 9.5 22 30.2 40.3 22.8
TFC-12M-6N 12 3/8 9.5 22 31.8 41.9 22.8
TFC-12M-8N 12 1/2 9.5 27 36.6 46.7 22.8
TFC-15M-8N 15 1/2 11.9 27 36.6 46.7 24.4
TFC-16M-8N 16 1/2 12.7 27 36.8 46.9 24.4
TFC-20M-8N 20 1/2 15.9 30 37.8 47.9 26.0
TFC-20M-12N 20 3/4 15.9 35 39.6 49.7 26.0
TFC-22M-12N 22 3/4 18.3 35 39.6 49.7 26.0
TFC-22M-16N 22 1 18.3 41 47.8 57.9 26.0
TFC-25M-12N 25 3/4 21.8 35 41.1 53.4 31.3
TFC-25M-16N 25 1 21.8 41 50.0 62.3 31.3
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice. TUBE (INCH) TO FEMALE NPT THREAD
Part Number A
Tube O.D.
T
NPT
D W
Hex. flat
N L I
in mm in in mm in mm in mm in mm in mm
TFC-1-1N 1/16 1.58 1/16 0.05 1.27 7/16 11.1 0.78 19.81 0.93 23.62 0.34 8.6
TFC-1-1N 1/16 1.58 1/8 0.05 1.27 9/16 14.3 0.81 20.57 0.96 24.38 0.34 8.6
TFC-2-2N 1/8 3.17 1/8 0.09 2.28 9/16 14.3 0.87 22.10 1.13 28.70 0.50 12.7
TFC-2-4N 1/8 3.17 1/4 0.09 2.28 3/4 19.1 1.06 26.92 1.32 33.52 0.50 12.7
TFC-3-2N 3/16 4.76 1/8 0.12 3.04 9/16 14.3 0.91 23.11 1.17 29.71 0.54 13.7
TFC-4-2N 1/4 6.35 1/8 0.19 4.82 9/16 14.3 0.94 23.87 1.23 31.24 0.60 15.3
TFC-4-4N 1/4 6.35 1/4 0.19 4.82 3/4 19.1 1.12 28.44 1.41 35.81 0.60 15.3
TFC-4-6N 1/4 6.35 3/8 0.19 4.82 7/8 22.2 1.19 30.22 1.48 37.59 0.60 15.3
TFC-4-8N 1/4 6.35 1/2 0.19 4.82 1-1/16 27.0 1.38 35.0 1.67 42.42 0.60 15.3
TFC-5-2N 5/16 7.93 1/8 0.25 6.35 9/16 14.3 0.97 24.63 1.26 32.00 0.64 16.3
TFC-5-4N 5/16 7.93 1/4 0.25 6.35 3/4 19.1 1.16 29.46 1.45 36.83 0.64 16.3
TFC-6-2N 3/8 9.52 1/8 0.28 7.11 5/8 15.9 1.00 25.40 1.29 32.76 0.66 16.9
TFC-6-4N 3/8 9.52 1/4 0.28 7.11 3/4 19.1 1.19 30.22 1.48 37.59 0.66 16.9
TFC-6-6N 3/8 9.52 3/8 0.28 7.11 7/8 22.2 1.25 31.75 1.54 39.11 0.66 16.9
TFC-6-8N 3/8 9.52 1/2 0.28 7.11 1-1/16 27.0 1.44 36.57 1.73 43.94 0.66 16.9
TFC-6-12N 3/8 9.52 3/4 0.28 7.11 1-5/16 33.3 1.59 40.38 1.88 47.75 0.66 16.9
TFC-8-4N 1/2 12.70 1/4 0.41 10.41 1-3/16 20.6 1.19 30.2 1.59 40.38 0.90 22.9
TFC-8-6N 1/2 12.70 3/8 0.41 10.41 7/8 22.2 1.25 31.75 1.65 41.91 0.90 22.9
TFC-8-8N 1/2 12.70 1/2 0.41 10.41 1-1/16 27.0 1.44 36.57 1.84 46.73 0.90 22.9
TFC-8-12N 1/2 12.70 3/4 0.41 10.41 1-5/16 33.3 1.50 38.10 1.90 48.26 0.90 22.9
TFC-10-6N 5/8 15.87 3/8 0.50 12.70 1-5/16 23.8 1.25 31.75 1.65 41.91 0.96 24.4
TFC-10-8N 5/8 15.87 1/2 0.50 12.70 1-1/16 27.0 1.44 36.57 1.84 46.73 0.96 24.4
TFC-10-12N 5/8 15.87 3/4 0.5 12.7 1-5/16 33.3 1.50 38.1 1.90 48.26 0.96 24.4
TFC-12-8N 3/4 19.05 1/2 0.62 15.74 1-1/16 27.0 1.44 36.57 1.84 46.73 0.96 24.5
TFC-12-12N 3/4 19.05 3/4 0.62 15.74 1-5/16 33.3 1.50 38.10 1.90 48.26 0.96 24.5
TFC-14-12N 7/8 22.22 3/4 0.72 18.28 1-5/16 33.3 1.56 39.62 1.96 49.78 1.02 25.9
TFC-16-12N 1 25.40 3/4 0.88 22.35 1-3/8 34.9 1.62 41.14 2.10 53.34 1.23 31.2
TFC-16-16N 1 25.40 1 0.88 22.35 1-3/8 41.3 1.97 50.03 2.45 62.23 1.23 31.2
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice. TUBE (METRIC) TO FEMALE ISO TAPERED THREAD
Part Number A
Tube O.D.
T
ISO
D W
Hex.Flat
N L I
mm in mm mm mm mm mm
TFC-3M-2P 3 Rc 1/8 2.4 14 22.1 28.7 12.9
TFC-6M-2P 6 Rc 1/8 4.8 14 23.9 31.3 15.3
TFC-6M-4P 6 Rc 1/4 4.8 19 28.4 35.8 15.3
TFC-6M-6P 6 Rc 3/8 4.8 22 30.2 37.6 15.3
TFC-6M-8P 6 Rc 1/2 4.8 27 35.1 42.5 15.3
TFC-8M-2P 8 Rc 1/8 6.4 15 24.6 32.1 16.2
TFC-8M-4P 8 Rc 1/4 6.4 19 29.5 37.0 16.2
TFC-8M-6P 8 Rc 3/8 6.4 22 31.0 38.5 16.2
TFC-8M-8P 8 Rc 1/2 6.4 27 35.8 43.3 16.2
TFC-10M-2P 10 Rc 1/8 7.9 18 25.4 33.0 17.2
TFC-10M-4P 10 Rc 1/4 7.9 19 30.2 37.8 17.2
TFC-10M-6P 10 Rc 3/8 7.9 22 31.8 39.4 17.2
TFC-10M-8P 10 Rc 1/2 7.9 27 36.6 44.2 17.2
TFC-12M-2P 12 Rc 1/8 8.3 22 25.4 35.5 22.8
TFC-12M-4P 12 Rc 1/4 9.5 22 30.2 40.3 22.8
TFC-12M-6P 12 Rc 3/8 9.5 22 31.8 41.9 22.8
TFC-12M-8P 12 Rc 1/2 9.5 27 36.6 46.7 22.8
TFC-12M-12P 12 Rc 3/4 9.5 35 38.9 49.0 22.8
TFC-15M-6P 15 Rc 3/8 11.9 24 31.8 41.9 24.4
TFC-15M-8P 15 Rc 1/2 11.9 27 36.6 46.7 24.4
TFC-20M-8P 20 Rc 1/2 15.9 30 37.8 47.9 24.4
TFC-20M-12P 20 Rc 3/4 15.9 35 39.6 49.7 26.0
TFC-22M-12P 22 Rc 3/4 18.3 35 39.6 49.7 26.0
TFC-22M-16P 22 Rc 1 18.3 41 47.8 57.9 26.0
TFC-25M-12P 25 Rc 3/4 21.8 35 41.1 53.4 31.3
TFC-25M-16P 25 Rc 1 21.8 41 50.0 62.3 31.3
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice. Reference Specifications : DIN - 2999 BS - 21 JIS - B0203 ISO - 7/1-BSP-T TUBE (INCH) TO FEMALE ISO TAPERED THREAD
Part Number A
Tube O.D.
T
ISO
D W
Hex.flat
N L I
in mm in in mm in mm in mm in mm in mm
TFC-1-1P 1/16 1.58 Rc 1/16 0.05 1.27 7/16 11.1 0.78 19.81 0.93 23.62 0.34 8.6
TFC-1-2P 1/16 1.58 Rc 1/8 0.05 1.27 9/16 14.3 0.81 20.57 0.96 24.38 0.34 8.6
TFC-2-2P 1/8 3.17 Rc 1/8 0.09 2.28 9/16 14.3 0.87 22.10 1.13 28.70 0.50 12.7
TFC-2-4P 1/8 3.17 Rc 1/4 0.09 2.28 3/4 19.1 1.06 26.92 1.32 33.52 0.50 12.7
TFC-3-2P 3/16 4.76 Rc 1/8 0.12 3.04 9/16 14.3 0.91 23.11 1.17 29.71 0.54 13.7
TFC-4-2P 1/4 6.35 Rc 1/8 0.19 4.82 9/16 14.3 0.94 23.87 1.23 31.24 0.60 15.3
TFC-4-4P 1/4 6.35 Rc 1/4 0.19 4.82 3/4 19.1 1.12 28.44 1.41 35.81 0.60 15.3
TFC-4-6P 1/4 6.35 Rc 3/8 0.19 4.82 7/8 22.2 1.19 30.22 1.48 37.59 0.60 15.3
TFC-4-8P 1/4 6.35 Rc 1/2 0.19 4.82 1-1/16 27.0 1.38 35.0 1.67 42.42 0.60 15.3
TFC-5-2P 5/16 7.93 Rc 1/8 0.25 6.35 9/16 14.3 0.97 24.63 1.26 32.00 0.64 16.3
TFC-5-4P 5/16 7.93 Rc 1/4 0.25 6.35 3/4 19.1 1.16 29.46 1.45 36.83 0.64 16.3
TFC-6-2P 3/8 9.52 Rc 1/8 0.28 7.11 5/8 15.9 1.00 25.40 1.29 32.76 0.66 16.9
TFC-6-4P 3/8 9.52 Rc 1/4 0.28 7.11 3/4 19.1 1.19 30.22 1.48 37.59 0.66 16.9
TFC-6-6P 3/8 9.52 Rc 3/8 0.28 7.11 7/8 22.2 1.25 31.75 1.54 39.11 0.66 16.9
TFC-6-8P 3/8 9.52 Rc 1/2 0.28 7.11 1-1/16 27.0 1.44 36.57 1.73 43.94 0.66 16.9
TFC-6-12P 3/8 9.52 Rc 3/4 0.28 7.11 1-5/16 33.3 1.59 40.38 1.88 47.75 0.66 16.9
TFC-8-4P 1/2 12.70 Rc 1/4 0.41 10.41 1-3/16 20.6 1.19 30.2 1.59 40.38 0.90 22.9
TFC-8-6P 1/2 12.70 Rc 3/8 0.41 10.41 7/8 22.2 1.25 31.75 1.65 41.91 0.90 22.9
TFC-8-8P 1/2 12.70 Rc 1/2 0.41 10.41 1-1/16 27.0 1.44 36.57 1.84 46.73 0.90 22.9
TFC-8-12P 1/2 12.70 Rc 3/4 0.41 10.41 1-5/16 33.3 1.50 38.10 1.90 48.26 0.90 22.9
TFC-10-6P 5/8 15.87 Rc 3/8 0.50 12.70 1-5/16 23.8 1.25 31.75 1.65 41.91 0.96 24.4
TFC-10-8P 5/8 15.87 Rc 1/2 0.50 12.70 1-1/16 27.0 1.44 36.57 1.84 46.73 0.96 24.4
TFC-10-12P 5/8 15.87 Rc 3/4 0.5 12.7 1-5/16 33.3 1.50 38.1 1.90 48.26 0.96 24.4
TFC-12-8P 3/4 19.05 Rc 1/2 0.62 15.74 1-1/16 27.0 1.44 36.57 1.84 46.73 0.96 24.5
TFC-12-12P 3/4 19.05 Rc 3/4 0.62 15.74 1-5/16 33.3 1.50 38.10 1.90 48.26 0.96 24.5
TFC-14-12P 7/8 22.22 Rc 3/4 0.72 18.28 1-5/16 33.3 1.56 39.62 1.96 49.78 1.02 25.9
TFC-16-12P 1 25.40 Rc 3/4 0.88 22.35 1-3/8 34.9 1.62 41.14 2.10 53.34 1.23 31.2
TFC-16-16P 1 25.40 Rc 1 0.88 22.35 1-3/8 41.3 1.97 50.03 2.45 62.23 1.23 31.2
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice. TUBE (METRIC) TO FEMALE ISO PARALLEL THREAD
Part Number A
Tube O.D.
T
ISO
D D1 W
Hex.flat
N N1 N2 L I
mm in mm mm mm mm mm mm mm mm mm mm
TFC-3M-4RG 3 G 1/4 2.4 0.22 5.5 19 28.7 13 0.67 17.0 35.3 12.9
TFC-6M-4RG 6 G 1/4 4.8 0.22 5.5 19 30.2 13 0.67 17.0 37.6 15.3
TFC-6M-6RG 6 G 3/8 4.8 0.26 6.5 24 30.2 16 0.80 20.3 37.6 15.3
TFC-6M-8RG 6 G 1/2 4.8 0.28 7.0 27 36.3 19 0.98 24.9 43.0 15.3
TFC-8M-4RG 8 G 1/4 5.5 - 19 31.0 13 - 38.5 16.2
TFC-8M-6RG 8 G 3/8 6.5 - 24 28.7 16 - 36.2 16.2
TFC-8M-8RG 8 G 1/2 7.0 - 27 33.0 19 - 40.5 16.2
TFC-10M-4RG 10 G 1/4 5.5 - 19 31.8 13 - 39.4 17.2
TFC-10M-6RG 10 G 3/8 6.5 - 24 31.2 16 - 38.8 17.2
TFC-10M-8RG 10 G 1/2 7.0 - 27 34.5 19 - 41.4 17.2
TFC-12M-4RG 12 G 1/4 5.5 - 22 31.8 13 - 41.9 22.8
TFC-12M-6RG 12 G 3/8 6.5 - 24 34.3 16 - 44.4 22.8
TFC-12M-8RG 12 G 1/2 7.0 - 27 38.1 19 - 48.2 22.8
TFC-20M-8RG 20 G 1/2 7.0 - 30 44.2 19 - 54.3 26.0
TFC-22M-8RG 22 G 1/2 7.0 - 30 44.2 19 - 54.3 26.0
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice. TUBE (INCH) TO FEMALE ISO PARALLEL THREAD
Part Number A
Tube O.D.
T
ISO
D D1 W
Hex.flat
N N1 N2 L I
in mm in in mm in mm in mm in mm in mm in mm in mm in mm
TFC-4-4RG 1/4 6.35 G 1/4 0.19 4.82 0.22 5.5 3/4 19.1 1.19 30.22 0.51 13 0.67 17.0 1.48 37.59 0.60 15.3
TFC-4-6RG 1/4 6.35 G 3/8 0.19 4.82 0.26 6.5 15/16 23.8 1.19 30.22 0.63 16 0.80 20.3 1.48 37.59 0.60 15.3
TFC-4-8RG 1/4 6.35 G 1/2 0.19 4.82 0.28 7.0 1-1/16 27.0 1.18 30.07 0.75 19 0.98 24.9 1.71 43.43 0.60 15.3
TFC-5-4RG 5/16 7.93 G 1/4 0.22 5.5 - 3/4 19.1 1.22 30.98 0.51 13 - 1.51 38.35 0.64 16.3
TFC-5-8RG 5/16 7.93 G 1/2 0.28 7.0 - 1-1/16 27.0 1.30 33.02 0.75 19 - 1.59 40.38 0.64 16.3
TFC-6-4RG 3/8 9.52 G 1/4 0.22 5.5 - 3/4 19.1 1.25 31.75 0.51 13 - 1.54 39.12 0.66 16.9
TFC-6-6RG 3/8 9.52 G 3/8 0.26 6.5 - 15/16 23.8 1.23 31.24 0.63 16 - 1.52 38.61 0.66 16.9
TFC-6-8RG 3/8 9.52 G 1/2 0.28 7.0 - 1-1/16 27.0 1.36 34.54 0.75 19 - 1.65 41.91 0.66 16.9
TFC-8-4RG 1/2 12.7 G 1/4 0.22 5.5 - 7/8 22.2 1.25 31.8 0.51 13 - 1.65 41.95 0.9 22.9
TFC-8-6RG 1/2 12.7 G 3/8 0.26 6.5 - 15/16 23.8 1.35 34.29 0.63 16 - 1.75 44.45 0.9 22.9
TFC-8-8RG 1/2 12.7 G 1/2 0.28 7.0 - 1-1/16 27.0 1.50 38.10 0.75 19 - 1.90 48.26 0.9 22.9
“D” - Dimension is minimum opening - dimensions are for reference only, and are subject to change without notice. Reference Specifications : DIN - ISO 228/1 BS - 2779 JIS - B0202 ISO - 228/1-BSP-T