Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
C8
4300
Catalog
Ferulok
®
Flareless Bite Type Fittings
Dimensions and pressures for reference only, subject to change.
F5BU
Straight Thread Connector
Flareless / SAE-ORB
SAE 080120
FBU
Male Connector
Flareless / NPTF
SAE 080102
WBU
Bulkhead Union
Flareless / Flareless
SAE 080601
*
W – Bulkhead pilot dia.
recommended clearance
hole is +.015 over W dia.
TUBE
FITTING
PART #
END SIZE
C2
HEX
(
in.)
I1
(
in.)
L4
(
in.)
W
(
in.)
Max.
Bulkhead
Thickness
Dynamic
Pressure
(
x 1,000 PSI)
1
(
in.)
2
(
in.)
-
S -SS
4
WBU
1/4 1/4 11/16 1.12 1.89 0.44 0.38 6.0 6.0
6
WBU
3/8 3/8 13/16 1.17 1.98 0.56 0.40 6.0 6.0
8
WBU
1/2 1/2 1 1.31 2.22 0.75 0.40 5.0 5.0
10
WBU
5/8 5/8 1 1/8 1.45 2.48 0.88 0.44 5.0 5.0
12
WBU
3/4 3/4 1 3/8 1.56 2.72 1.06 0.44 4.5 4.5
16
WBU
1 1 1 5/8 1.56 2.72 1.31 0.44 4.0 4.0
TUBE
FITTING
PART #
END SIZE
C4
HEX
(
in.)
L5
(
in.)
Dynamic
Pressure
(
x 1,000 PSI)
1
(
in.)
2
UN/UNF-2A
-
S -SS
2
F5BU
1/8 5/16 - 24
7/16 0.99 6.0 6.0
3
F5BU
3/16 3/8 - 24
1/2 1.05 6.0 6.0
4
F5BU
1/4 7/16 - 20
9/16 1.13 6.0 6.0
4-5
F5BU
1/4
1/2 - 20
5/8 1.13 6.0 6.0
4-6
F5BU
1/4 9/16 - 18 11/16 1.20 6.0 6.0
5
F5BU
5/16 1/2 - 20
5/8 1.13 6.0 6.0
6
F5BU
3/8 9/16 - 18 11/16 1.22 6.0 6.0
6-4
F5BU
3/8 7/16 - 20
5/8 1.19 6.0 6.0
6-8
F5BU
3/8
3/4 - 16
7/8 1.28 6.0 6.0
8
F5BU
1/2
3/4 - 16
7/8 1.38 5.0 5.0
8-6
F5BU
1/2 9/16 - 18 13/16 1.28 5.0 5.0
8-10
F5BU
1/2
7/8 - 14
1
1.50 5.0 5.0
8-12
F5BU
1/2 1 1/16 - 12 1 1/4 1.67 4.5 4.5
10
F5BU
5/8
7/8 - 14
1
1.56 5.0 5.0
10-12
F5BU
5/8 1 1/16 - 12 1 1/4 1.73 4.5 4.5
12
F5BU
3/4 1 1/16 - 12 1 1/4 1.78 4.5 4.5
12-8
F5BU
3/4
3/4 - 16
1 1/8 1.75 4.5 4.5
12-16
F5BU
3/4 1 5/16 - 12 1 1/2 1.81 4.0 4.0
16
F5BU
1 1 5/16 - 12 1 1/2 1.81 4.0 4.0
16-12
F5BU
1 1 1/16 - 12 1 3/8 1.81 4.0 4.0
16-20
F5BU
1
1 5/8 - 12 1 7/8 1.91 3.0 3.0
20
F5BU
1 1/4 1 5/8 - 12 1 7/8 1.91 3.0 3.0
24
F5BU
1 1/2 1 7/8 - 12 2 1/8 1.97 3.0 3.0
32
F5BU
2
2 1/2 - 12 2 3/4 2.13 2.0 2.0
TUBE
FITTING
PART #
END SIZE
C
HEX
(
in.)
L
(
in.)
Dynamic
Pressure
(
x 1,000 PSI)
1
(
in.)
2
NPTF
-
S -SS
2
FBU
1/8
1/8 - 27
7/16 1.04 6.0 6.0
2-4
FBU
1/8
1/4 - 18
9/16 1.24 6.0 6.0
3
FBU
3/16
1/8 - 27
7/16 1.09 6.0 6.0
4
FBU
1/4
1/8 - 27
1/2 1.12 6.0 6.0
4-4
FBU
1/4
1/4 - 18
9/16 1.32 6.0 6.0
4-6
FBU
1/4
3/8 - 18
3/4 1.33 6.0 6.0
4-8
FBU
1/4
1/2 - 14
7/8 1.58 6.0 6.0
5
FBU
5/16
1/8 - 27
9/16 1.12 6.0 6.0
5-4
FBU
5/16
1/4 - 18
9/16 1.32 6.0 6.0
6
FBU
3/8
1/4 - 18
5/8 1.34 6.0 6.0
6-2
FBU
3/8
1/8 - 27
5/8 1.15 6.0 6.0
6-6
FBU
3/8
3/8 - 18
3/4 1.35 6.0 6.0
6-8
FBU
3/8
1/2 - 14 15/16 1.60 6.0 6.0
8
FBU
1/2
3/8 - 18 13/16 1.44 5.0 5.0
8-4
FBU
1/2
1/4 - 18 13/16 1.44 5.0 5.0
8-8
FBU
1/2
1/2 - 14
7/8 1.69 5.0 5.0
8-12
FBU
1/2
3/4 - 14
1 1/8 1.76 4.0 4.0
10
FBU
5/8
1/2 - 14 15/16 1.75 4.5 4.5
10-6
FBU
5/8
3/8 - 18 15/16 1.56 4.5 4.5
10-12
FBU
5/8
3/4 - 14
1 1/8 1.82 4.0 4.0
12
FBU
3/4
3/4 - 14
1 1/8 1.88 4.0 4.0
12-8
FBU
3/4
1/2 - 14
1 1/8 1.88 4.0 4.0
14
FBU
7/8
3/4 - 14
1 1/4 1.88 3.0 3.0
16
FBU
1
1 - 11 1/2 1 3/8 2.07 3.0 3.0
16-12
FBU
1
3/4 - 14
1 3/8 1.88 3.0 3.0
20
FBU
1 1/4 1 1/4 - 11 1/2 1 11/16 2.18 2.5 2.5
24
FBU
1 1/2 1 1/2 - 11 1/2 2
2.28 2.5 2.5
32
FBU
2
2 - 11 1/2 2 3/4 2.46 2.0 2.0
Part comes with the WLN locknut.
All “FBU” fittings include a 30° chamfer for sealing with NPSM swivel type fit-
tings (steel only).