Seal Family Designations

Radial Seals for piston, shaft, and other types of annulus applications:

Family Code	Spring Type	Gland Specification	Jacket Cross Section
FM	Finger	Mil-G-5514	Symmetrical	Standard Heel
FF	Finger	Fractional Inch	Symmetrical	Standard Heel
CM	Canted	Mil-G-5514	Symmetrical	Standard Heel
CF	Canted	Fractional Inch	Symmetrical	Standard Heel
HM	Helical	Mil-G-5514	Symmetrical	Standard Heel
HF	Helical	Fractional Inch	Symmetrical	Standard Heel
RM	Ribbon	Mil-G-5514	Symmetrical	Standard Heel
RF	Ribbon	Fractional Inch	Symmetrical	Standard Heel
FMH	Finger	Mil-G-5514	Symmetrical	Heavy Heel
FFH	Finger	Fractional Inch	Symmetrical	Heavy Heel
CMH	Canted	Mil-G-5514	Symmetrical	Heavy Heel
CFH	Canted	Fractional Inch	Symmetrical	Heavy Heel
HMH	Helical	Mil-G-5514	Symmetrical	Heavy Heel
HFH	Helical	Fractional Inch	Symmetrical	Heavy Heel
RMH	Ribbon	Mil-G-5514	Symmetrical	Heavy Heel
RFH	Ribbon	Fractional Inch	Symmetrical	Heavy Heel
FMI	Finger	Mil-G-5514	Internal Scraper Lip	Standard Heel
FFI	Finger	Fractional Inch	Internal Scraper Lip	Standard Heel
HMI	Helical	Mil-G-5514	Internal Scraper Lip	Standard Heel
HFI	Helical	Fractional Inch	Internal Scraper Lip	Standard Heel
FMIH	Finger	Mil-G-5514	Internal Scraper Lip	Heavy Heel
FFIH	Finger	Fractional Inch	Internal Scraper Lip	Heavy Heel
HMIH	Helical	Mil-G-5514	Internal Scraper Lip	Heavy Heel
HFIH	Helical	Fractional Inch	Internal Scraper Lip	Heavy Heel
FME	Finger	Mil-G-5514	External Scraper Lip	Standard Heel
FFE	Finger	Fractional Inch	External Scraper Lip	Standard Heel
FMEH	Finger	Mil-G-5514	External Scraper Lip	Heavy Heel
FFEH	Finger	Fractional Inch	External Scraper Lip	Heavy Heel
HMEH	Helical	Mil-G-5514	External Scraper Lip	Heavy Heel
HFEH	Helical	Fractional Inch	External Scraper Lip	Heavy Heel
FMD	Finger	Mil-G-5514	Double Scraper	Standard Heel
FFD	Finger	Fractional Inch	Double Scraper	Standard Heel
HMD	Helical	Mil-G-5514	Double Scraper	Standard Heel
HFD	Helical	Fractional Inch	Double Scraper	Standard Heel
FMDH	Finger	Mil-G-5514	Double Scraper	Heavy Heel
FFDH	Finger	Fractional Inch	Double Scraper	Heavy Heel
HMDH	Helical	Mil-G-5514	Double Scraper	Heavy Heel
HFDH	Helical	Fractional Inch	Double Scraper	Heavy Heel

Heavy Heel versions of Duraseal require longer glands than the referenced standards provide.
Refer to the Gland Dimension pages for particulars.

Face Seals for internal pressure applications
(static and slow rotary motion):

FIF	Finger Spring Design
HIF	Helical Spring Design
UIF	Full Contact Spring Design
LIF	Lathe-cut Spring Design
BIF	Belleville Spring Design

Face Seals for external pressure applications
(static and slow rotary motion):

FEF	Finger Spring Design
HEF	Helical Spring Design
UEF	Full Contact Spring Design
LEF	Lathe-cut Spring Design
BEF