Appleton LFMC Selection Guide
PRODUCT SELECTOR - CONNECTORS FOR LIQUIDTIGHT FLEXIBLE METAL CONDUIT (LFMC)
O-Z/Gedney™ Product Family Material Finish Trade Size Configurations Selection Key
4Q and 4Q-T
Series
4Q-FM Series Malleable Iron Zinc Electroplate 3/8" to 5"
4Q-WM Series
4Q-LT
Ground-Tite™
Series
4Q-FML
Ground-Tite™
Series
4Q-TG Series
Malleable Iron Zinc Electroplate 3/8" to 6" Straight, 45°, 90°
Malleable Iron
and Stainless
Steel
Malleable Iron Zinc Electroplate 3/8" to 6"
Malleable Iron Zinc Electroplate 3/8" to 5"
Malleable Iron
Zinc Electroplate 3/8" to 4" Straight
Hot Dip / Mechanically
Galvanized
3/8" to 6"
Straight Female
Hub for connection
to RMC/IMC
Straight (3/8” to
6”),
45° (3/8” to 5”),
90° (3/8” to 5”)
Female Straight
Hub for connection
to RMC/IMC
Straight (3/8" to 6"),
45° (3/8" to 5"),
90° (3/8” to 5”)
Standard Liquidtight connector.
Use with LFMC in heavy
commercial and industrial
applications
Female hub threads directly
to conduit threads. Transition
from RMC/IMC to LFMC in heavy
commercial and industrial
applications
Strain Relief with stainless
steel wire-mesh grip. Prevents
conduit pull-out and alleviates
flexing stress
To externally ground LFMC
in commercial and industrial
applications; maximum 6 foot
length of LFMC
To externally ground LFMC
in commercial and industrial
applications; maximum 6 foot
length of LFMC
Hot Dip / Mechanically
Galvanized connectors for
atmospheres containing severe
corrosives
Appleton™ and O-Z/Gedney™ Material Finish Trade Size Configurations Selection Key
High grade stainless steel
4QSS-T Series316 Grade
Stainless Steel
4QS and
4QS-T Series
LMM and
LML Series
NMM and NML
Series
O-Z/Gedney™ 4Q = plain throat; O-Z/Gedney™ 4Q-T = insulated throat
Steel and
Malleable Iron
Zinc Diecast Natural 3/8" to 4" Straight, 90°
Nylon Natural 3/8" to 1" Straight, 90°
Natural 3/8" to 2" Straight, 45°, 90°
Zinc Electroplate 3/8" to 4" Straight, 45°, 90°
LFMC connectors are ideal in
areas that are subject to severe
corrosive influences
Standard Liquidtight connector.
Use with LFMC in commercial
and light industrial applications
Cost-competitive liquidtight
connectors. Use with LFMC in
residential and light commercial
applications
For use with Type B Liquidtight
Flexible Nonmetallic Conduit
(LFNC) in residential and light
commercial installations
PRODUCT SELECTOR - CONNECTORS FOR LIQUIDTIGHT FLEXIBLE METAL CONDUIT (LFMC)
Appleton™ Material Finish Trade Size Configurations Selection Key
ST and STB
Series
STF Series
STB-SR,
STB-FSR and
STN-SR Series
ST-L and
STB-L Series
Steel and
Malleable Iron
Steel and
Malleable Iron
Steel, Malleable
Iron and
Stainless Steel
Steel and
Malleable Iron
ST-AL SeriesAluminum
(copperfree)
STN Series
Steel and
Malleable Iron
Steel: Zinc Electroplate
Malleable: Triple Coat
Steel: Zinc Electroplate
Malleable: Triple Coat
Steel: Zinc Electroplate
Malleable: Triple Coat
Steel: Zinc Electroplate
Malleable: Triple Coat
3/8" to 4" Straight, 45°, 90°
3/8" to 4" Straight
3/8" to 3" Straight, 45°, 90°
3/8" to 4" Straight, 45°, 90°
Natural 3/8" to 4"
Steel: Zinc Electroplate
Malleable: Triple Coat
3/8" to 4"
Straight (3/8" to 4"),
90° (3/8" to 2")
Straight (3/8" to 4"),
90° (3/8" to 1")
Standard Liquidtight connector.
Use with LFMC in heavy
commercial and industrial
applications
Female hub threads directly
to conduit threads. Transition
from RMC/IMC to LFMC in heavy
commercial and industrial
applications
Strain Relief with stainless
steel wire-mesh grip. Prevents
conduit pull-out and alleviates
flexing stress
To externally ground LFMC
in commercial and industrial
applications; maximum 6 foot
length of LFMC
Use with LFMC in corrosive
industrial applications where
aluminum material is prefered
for corrosion resistance
Space-saving hub with insulated
throat fits almost flush inside
sheet metal enclosure,
maximizing interior wiring space
STNM and
STNM-SR
Series
PG-STB and
ISO-STB Series
Appleton™ ST = plain throat; Appleton™ STB = insulated throat
Appleton™ and O-Z/Gedney™ Liquidtight Connectors are suitable for use in the following hazardous locations:
• Class I Division 2 per NEC 501.10(B)(2)
• Class I Zone 2 per NEC 505.15(C)(2)
• Class II Division 1 per NEC 502.10(A)(2)
• Class II Division 2 per NEC 502.10(B)(2)
• Class III Division 1 per NEC 503.10(A)(3)
• Class III Division 2 per NEC 503.10(B)
• Intrinsically Safe Systems per NEC 504.20
• Bonding locknuts are recommended when installed in slipholes
• LFMC shall include a wire-type Equipment Bonding Jumper per NEC 501.30(B), 502.30(B)and 503.30(B)
Where flexibility is not required, LFMC is suitable as a ground return path under the following conditions (reference NEC 350.60):
• Per NEC 250.118(6)(a), the conduit is terminated in listed fittings (i.e. Appleton™ ST and O-Z/Gedney™ 4Q and LM Series)
• Per NEC 250.118(6)(b), trade sizes 3/8” and 1/2” contain conductors protected by max 20 amp overcurrent protection
• Per NEC 250.118(6)(c), trade sizes 3/4” to 1-1/4” contain conductors protected by max 60 amp overcurrent protection
• Per NEC 250.118(6)(d), the ground fault current path does not exceed 6 feet
• Larger sizes and/or higher overcurrent protection will require an equipment grounding conductor (EGC)
Appleton™ ST-L and STB-L, O-Z/Gedney™ 4Q-LT and 4Q-FML are recommended for connection to maximum 6 foot external equipment grounding conductor (EGC) per NEC 250.102(E)(2).
Where flexibility is required after installation to allow movement or minimize vibration, an equipment grounding conductor (EGC) must be installed per NEC 250.118(6)(e).
Steel and
Malleable Iron
Steel and
Malleable Iron
Zinc Electroplate 3/8" to 2" Straight, 90°
Steel: Zinc Electroplate
Malleable: Triple Coat
PG: 3/8" to 2"
ISO: 3/8" to 1"
Straight, 45°, 90°
For use with Type A Liquidtight
Flexible Nonmetallic Conduit
(LFNC). Insulated throat is
standard
PG and ISO metric threads on
male hub body with ferrule and
cap to accept standard trade
size LFMC
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