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Class

Class 2

Class 6

Class 3

Class 4

Class 5

Class 1

Class 7

Different Diameter-B Side

Same Diameter (B Side)

3B (Applicable Tubing Size 1/4" x 5/32")

2C (Applicable Tubing Size 1/8" x 0.086"; 3x2mm)

33 (Applicable Tubing Size mm 6x4)

5B (Applicable Tubing Size 1/2" x 3/8", Flange 20A)

6B (Applicable Tubing Size 3/4" x 5/8", Flange 25A)

3A (Applicable Tubing Size 3/8" x 1/4")

22 (Applicable Tubing Size mm 4x3)

4B (Applicable Tubing Size 3/8" x 1/4", Flange 15A)

32 (Applicable Tubing Size mm 8x6)

2A (Applicable Tubing Size 1/4" x 5/32")

5A (Applicable Tubing Size 3/4" x 5/8", Flange 20A)

2B (Applicable Tubing Size 3/16" x 0.127")

42 (Applicable Tubing Size mm 10x8)

Fitting Type

L (Elbow)

H (Connector)

B (Branch Tee)

H (Straight)

R (Run Tee)

T (Union Tee)

U (Union)

E (Union Elbow)

P (Panel Mount Union)

U (Straight Union)

E (Elbow Union)

T (Tee Union)

P (Panel Union)

None

F (Union Flange)

Inch Size, Side A

No (Select Metric Size, Side A)

3A (Tube O.D. 1/4", Tubing Size 3/8"x1/4")

4C (Tube O.D. 1/2", Tubing Size 1/2"x3/8")

4D (Tube O.D. 1/2", Tubing Size 3/8"x1/4")

2D (Tube O.D. 1/4", Tubing Size 1/4"x5/32")

5C (Tube O.D. 3/4", Tubing Size 3/4"x5/8")

5A (Tube O.D. 1/2", Tubing Size 3/4"x5/8")

1A (Tube O.D. 1/8", Tubing Size 1/8"x0.086")

2A (Tube O.D. 1/8", Tubing Size 1/4"x5/32")

6D (Tube O.D. 1", Tubing Size 3/4"x5/8")

4G (Tube O.D. 1/4", Tubing Size 1/2"x3/8")

2F (Tube O.D. 1/4", Tubing Size 1/8"x0.086")

6C (Tube O.D. 1", Tubing Size 1"x7/8")

3D (Tube O.D. 3/8", Tubing Size 1/4"x5/32")

4B (Tube O.D. 3/8", Tubing Size 3/8"x1/4")

6A (Tube O.D. 3/4", Tubing Size 1"x7/8")

3C (Tube O.D. 3/8", Tubing Size 3/8"x1/4")

5D (Tube O.D. 3/4", Tubing Size 1/2"x3/8")

5B (Tube O.D. 1/2", Tubing Size 1/2"x3/8")

Inch Size, Side B

No (For Types H and L, and Types B or R w/Same Tubing Size)

5G (Tube O.D. 1/4", Tubing Size 3/4"x5/8")

3F (Tube O.D. 1/8", Tubing Size 3/8"x1/4")

4E (Tube O.D. 1/2", Tubing Size 1/4"x5/32")

5E (Tube O.D. 3/4", Tubing Size 3/8"x1/4")

Metric Size, Side A

No (Select Inch Size, Side A)

31 (Tube O.D. 1/4", Tubing Size mm 10x8)

23 (Tube O.D. 1/4", Tubing size mm 6x4)

21 (Tube O.D. 1/8", Tubing Size mm 6x4)

36 (Tube O.D. 3/8", Tubing Size mm 6x4)

43 (Tube O.D. 1/2", Tubing Size mm 12x10)

2F (Tube O.D. 1/4", Tubing Size mm 3x2)

32 (Tube O.D. 1/4", Tubing Size mm 8x6)

33 (Tube O.D. 1/4", Tubing Size mm 6x4)

41 (Tube O.D. 3/8", Tubing Size mm 12x10)

22 (Tube O.D. 1/8", Tubing Size mm 4x3)

11 (Tube O.D. 1/8", Tubing Size mm 4x3)

44 (Tube O.D. 1/2", Tubing Size mm 10x8)

12 (Tube O.D. 1/8", Tubing Size mm 3x2)

53 (Tube O.D. 3/4", Tubing Size mm 19x16)

51 (Tube O.D. 1/2", Tubing Size mm 19x16)

34 (Tube O.D. 3/8", Tubing Size mm 10x8)

49 (Tube O.D. 1/4", Tubing Size mm 12x10)

35 (Tube O.D. 3/8", Tubing Size mm 8x6)

Metric Size, Side B

3E (Tube O.D. 3/8", Tubing Size mm 3x2)

310 (Tube O.D. 1/8", Tubing Size mm 8x6)

Nut Material / Packaging

PFA / Clean Packaging Equiv. to Class M3.5

1 (PFA / Standard Packaging Equiv. to Class M5.5)

Packaging

Clean Packaging Equivalent to Class M3.5

Clean Packaging (Standard Packaging)

1 (Standard Packaging Equivalent to Class M5.5)

3 (Packaging Equivalent to Class M5.5 w/PVDF Nut)

1 (Packaging Equivalent to Class M5.5)

2 (Packaging Equivalent to Class M3.5 w/PVDF Nut)

1 (Tubing Plug Nut Material: PFA; Standard Packaging Equivalent to Class M5.5)

w/o an Insert Bush

Piping

M (Male)

F (Female)

Piping Type

S (Space Saving)

T (Tube)

SB (Space Saving, Branch)

SR (Space Saving, Run)

Piping, Thread

2 (Tube Piping for Tubing Plug)

1 (Male Thread for Blanking Plug)

Size

3 (Size 3)

2 (Size 2)

4 (Size 4)

1 (Size 1)

6 (Size 6)

5 (Size 5)

5A (Tubing: 3/4" x 5/8", Piping: ø21.3 x ø15.4)

6A (Tubing: 1" x 3/4", Piping: ø26.7 x ø20.5)

5B (Tubing: 3/4" x 5/8", Piping: ø26.7 x ø20.5)

7A (Tubing: 1 1/4" x 1.1", Piping: ø33.4 x ø26.3)

6B (Tubing: 1" x 3/4", Piping: ø33.4 x ø26.3)

4C (Tubing: 1/2" x 3/8", Piping: ø33.4 x ø26.3)

5C (Tubing: 3/4" x 5/8", Piping: ø33.4 x ø26.3)

2A (Tubing: 1/4" x 5/32", Piping: ø13.7 x ø9)

4B (Tubing: 1/2" x 3/8", Piping: ø26.7 x ø20.5)

4A (Tubing: 1/2" x 3/8", Piping: ø21.3 x ø15.4)

2B (Tubing: 1/4" x 5/32", Piping: ø21.3 x ø15.4)

3B (Tubing: 3/8" x 1/4", Piping: ø21.3 x ø15.4)

52 (Tubing: 19mm x 16mm, Piping: ø26.7 x ø20.5)

Size Combination

4C (Tubing: 1/2" x 3/8"; Thread: 1/2")

6C (Tubing: 1" x 7/8"; Thread: 1")

2B (Tubing: 1/4" x 5/32"; Thread: 1/4")

3C (Tubing: 3/8" x 1/4"; Thread: 3/8")

5C (Tubing: 3/4" x 5/8"; Thread: 3/4")

6A (Tubing: 1" x 7/8"; Thread: 1/2")

4A (Tubing: 1/2" x 3/8"; Thread: 1/4")

3B (Tubing: 3/8" x 1/4"; Thread: 1/4")

4A (1/2" x 3/8")

4B (Tubing: 1/2" x 3/8"; Thread: 3/8")

5A (Tubing: 3/4" x 5/8"; Thread: 3/8")

2A (Tubing: 1/4" x 5/32"; Thread: 1/8")

6B (Tubing: 1" x 7/8"; Thread: 3/4")

6A (1" x 7/8")

5B (Tubing: 3/4" x 5/8"; Thread: 1/2")

1A (Tubing: 1/8" x 0.086"; Thread: 1/8")

5A (3/4" x 5/8")

3A (Tubing: 3/8" x 1/4"; Thread: 1/8")

2A (1/4" x 5/32")

Size Combination-A Side

6A (Applicable Tubing Size 1" x 7/8", Flange 25A)

4A (Applicable Tubing Size 1/2" x 3/8", Flange 15A)

21 (Applicable Tubing Size mm 6x4)

1A (Applicable Tubing Size 1/8" x 0.086")

41 (Applicable Tubing Size mm 12x10)

31 (Applicable Tubing Size mm 10x8)

51 (Applicable Tubing Size mm 19x16)

11 (Applicable Tubing Size mm 4x3)

Size Combinations

2A-ST1 (1/4" x 5/32")

4A-ST2 (1/2" x 3/8"; Type 2)

4A-ST4 (1/2" x 3/8"; Type 4)

3A-ST2 (3/8" x 1/4"; Type 2)

4A-SS (1/2" x 3/8")

4A-ST3 (1/2" x 3/8"; Type 3)

2A-SS (1/4" x 5/32")

3A-SS (3/8" x 1/4")

5A-SS (3/4" x 5/8")

21 (6 x 4)

4A-T-R1 (A: 1/2"; B: 3/8" x 1/4")

3A-ST1 (3/8" x 1/4"; Type 1)

21-ST4 (6 x 4, Type 4)

2A-T-R9 (A: 1/4"; B: 1/2" x 3/8")

3A (3/8" x 1/4")

4A-T-R8 (A: 1/2"; B: 3/4" x 5/8")

Thread

N (NPT)

R, Rc

Thread type

Tubing Size

03 (1/8" x 0.086" or ø3 x ø2)

07 (1/4" x 5/32")

11 (3/8" x 1/4")

19 (3/4" x 5/9" or ø19 x ø16)

13 (1/2" x 3/8")

06 (ø6 x ø4)

25 [1"x7/8" (ø25 x ø22)]

07 (1/4"x5/32")

13 (1/2"x3/8")

04 (ø4 x ø3)

11 (3/8"x1/4")

19 [3/4"x5/8" (ø19 x ø16)]

25 (1" x 7/8" or ø25 x ø22.5)

08 (ø8 x ø6)

LQ High Purity Hyperflare™ Fittings