The Parker Ferulok bite type flareless fitting's robust construction and proven sealing characteristics have gained it worldwide popularity in diverse industries and applications where a strong, flareless fitting is needed.
All Parker Ferulok flareless fittings conform to SAE J514 specs. Parker bite type fittings for metric applications, EO & EO-2, conform to ISO 8434-1 standards. Some Ferulok fittings conform to the requirements of specification sheets MS518XX under MIL-F-18866, and others do not. Contact Hose & Fittings. Etc. for conformance details.
Ferulok bite type flareless fittings are available in steel and stainless steel and can be furnished in other materials by Hose & Fittings. Etc. on request.
A bite type fitting is sometimes incorrectly referred to as a compression fitting. Compression fittings are designed for use with soft tubing and are not interchangable with bite type fittings!
The Ferulok bite type fitting is a flareless fitting that consists of a body, a one-piece precision machined ferrule, and a nut. On assembly, the ferrule “bites” into the outer surface of the tube with sufficient strength to hold the tube against pressure, without significant distortion of the inside tube diameter. The ferrule also forms a pressure seal against the fitting body.
Parker Ferulok fittings allow the fitting assembler to visually inspect the bite quality, thus significantly minimizing the risk of improper assembly and related service problems.
Available Configurations
Nuts, Ferrules, Locknuts
 |
Nut
BU |
 |
Sleeve
TU |
 |
Bulkhead Locknut
WLN |
Straights
 |
Union
HBU |
 |
Large Hex Union
LHBU |
 |
Bulkhead Union
WBU |
 |
SAE-ORB / Flareless
F5BU |
 |
NPTF / Flareless
FBU |
 |
NPTF / Flareless
GBU |
 |
Tube End Reducer
TRBU |
45 Elbows
 |
SAE-ORB / Flareless
V5BU |
 |
NPTF / Flareless
VBU |
90 Elbows
 |
Union Elbow
EBU |
 |
Bulkhead Union Elbow
WEBU |
 |
Flareless Swivel / Flareless
C6BU |
 |
SAE-ORB / Flareless
C5BU |
 |
SAE-ORB / Flareless
CC5BU |
 |
NPTF / Flareless
CBU |
 |
NPTF / Flareless
DBU |
Tees
 |
Union Tee
JBU |
 |
Swivel Branch Tee
S6BU |
 |
Swivel Run Tee
R6BU |
 |
SAE-ORB Branch Tee
S5BU |
 |
SAE-ORB Run Tee
R5BU |
 |
NPTF Branch Tee
SBU |
 |
NPTF Run Tee
RBU |
 |
NPTF Branch Tee
OBU |
 |
NPTF Run Tee
MBU |
Cross
 |
Union Cross
KBU |
Plugs and Caps
 |
Plug
PNU |
 |
Cap
FNU |
Conversion Adapters
 |
37° Flare / Flareless
XHBU |
 |
37° / Flareless Bulkhead
XHBU2 |
 |
ORFS / 24° Flareless
BUHLO |
Flange Adapters
 |
Code 61 / Flareless
BUHQ1 |
 |
Code 61 / Flareless
BUVQ1 |
 |
Code 61 / Flareless
BUEQ1 |