1-39
Class I, Div. 2
Class II, Div. 1 and 2
Class III Div. 1 and 2
NEC 501-4(b), 502-4(a)(2),
503-3(a)
Applications
• Provides a dependable connection
for liquidtight flexible metal conduit.
Seals out oil, water, dust, dirt and
fumes.
Features
• ST Series has plain throat; STB Series has insulated throat to protect
against wire damage.
• Unique long ferrule with more pronounced threads provides over four
times UL pull-out requirements.
• Ferrule also provides maximum surface contact for better sealing and a
continuous, permanent, positive metalto-metal ground.
• Liquidtight/raintight/oiltight.
• Suitable for wet locations.
• Full, machined tapered threads
(NPT).
• Compact design with small turning
radius.
Standard Materials
• 3/8" to 1" (straight): steel.
• 1-1/4" to 6" (straight) and 3/8" to 4"
(45° and 90°): malleable iron.
• Ferrule: (3/8" to 1") steel; (1-1/4" to
6") aluminum.
Standard Finishes
• Steel-zinc electroplate.
• Malleable iron-zinc electroplate,
dichromate and aluminum polymer
enamel.
Size Range:
• 3/8" thru 6" conduit size (straight)
• 3/8" thru 4" conduit size (45° and 90°)
Compliances
• UL Standard 5146.
• CSA Standard C22.2 No. 65178.
• Suitable for hazardous locations
Class I, Div. 2
Class II, Div. 1 and 2
Class III, Div. 1 and 2
NEC 501-4(b), 502-4(a)(2), 503-3(a)
Effective October, 1993
Copyright 1993 Printed in U.S.A.
Liquidtight "ST" and "STB"
Connectors for
Flexible Metal Conduit
ST Series with plain throat; STB Series with insulated throat.
ST Connectors
Straight
Catalog
Number
ST-38
ST-50
ST-75
ST-100
ST-125
ST-150
ST-200
ST-250
ST-300
ST-350
ST-400
ST-500
ST-600
90°
45°
Catalog
Size
Size
Number
3/8 flex, 1/2 hub ST-4538
1/2
ST-4550
3/4
ST-4575
1-1/4
ST-45100
1-1/2
ST-45125
2
ST-45150
2-1/2
ST-45200
3
ST-45250
3-1/2
ST-45300
4
ST-45400
—
5
—
6
—
3/8 flex, 1/2 hub
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
4
—
—
—
Catalog
Number
ST-9038
ST-9050
ST-9075
ST-90100
ST-90125
ST-90150
ST-90200
ST-90250
ST-90300
ST-90400
—
—
—
Size
3/8 flex, 1/2 hub
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
4
—
—
—
STB Connectors
Straight
Catalog
Number
45°
90°
Catalog
Size
STB-38 3/8 flex. 1/2 hub
STB-50
1/2
STB-75
3/4
STB-100
1
STB-125
1-1/4
STB-150
1-1/2
STB-200
2
STB-250
2-1/2
STB-300
3
STB-350
3-1/2
STB-400
4
STB-500
5
STB-600
6
Number
Catalog
Size
STB-4538
STB-4550
STB-4575
STB-45100
STB-45125
STB-45150
STB-45200
STB-45250
STB-45300
STB-45400
3/8 flex, 1/2 hub
1/2
3/4
1
—
—
—
—
—
—
1-1/4
1-1/2
2
2-1/2
3
4
Number
Size
STB-9038
STB-9050
STB-9075
STB-90100
STB-90125
STB-90150
STB-90200
STB-90250
STB-90300
STB-90400
3/8 flex, 1/2 hub
—
—
—
—
—
—
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
4
1701 West Wellington Avenue
Chicago, Illinois 60657
PAGE 39
ST
Liquidtight Flexible Metal Conduit Connectors and Hubs
Metallic Connectors Held Tight For Over 4 Times The UL Pull-out Requirement!
Seal Out Oil, Water,
Dirt, Dust and Fumes
in Applications For:
Space saving straight and 90° "STN" Series
(Page 9) with an insulated throat wedge
adapter designed to form a tight seal in
knockouts provides maximum
wiring room.
Straight "STN" sizes from 3/8" to 4" and 90°
3
"STN" sizes from /a" to 1".
• Food Processors
• Beverage Plants
• Chemical Plants
• Dairies
• Machine Shops
• Plastic Fabricators
• Petroleum Machinery
• Gantry Cranes
... And Many Others
a
Straight "ST" and "STB" (Pages 3,4) Series
with grounding ferrule. "STB" series has
insulated throat. "ST" and "STB" sizes 3/a"
to 6".
45° "ST" and "STB" Series (Pages 3,4) make
some of
the most difficult wiring jobs easier.
Sizes 3/a" to 4".
90° "ST" and "STB" Series (Pages 3, 4) for
use where there isn't room to connect
straight off an encloser, which saves on
conduit and conductors. Sizes 3/e" to 4".
Refer to Pricing Index for Prices.
Page 2
Effective November, 1993
90° "STL" Pulling Elbows (Page 10) have
one end for connecting liquidtight flexible
conduit. The other end has a close, removable male nipple to make female. Sizes 1/2",
3/4" and 1". Straight Female Steel "ST"
Connectors (Page 6) with threaded hubs in
sizes 3/s" to 1".
Appleton's "ST" and "STB" Connectors
(Pages 5,6) with an integral copper grounding lug to provide visible positive external
ground. Straight connectors in sizes 3/a"
to 6", and 45° and 90° connectors in sizes
3
/s" to 4".
For use with liquidtight flexible metal conduit
where an external visible equipment bonding jumper is desired and permitted by the
1981 National Electrical Code Sections
250-79(e), 501 -16(b)and 502-16(b) (where
external equipment bonding jumpers are
permitted, they will be limited to lengths not
exceeding 6 feet and will be routed parallel
to the conduit enclosure).
Bonded steel zinc electroplated lugs are
adequately sized to provide excellent
grounding continuity and allow for visible
ground path inspection. The ground wire is
easily installed using only an Alien head
wrench.
Liquidtight connectors with grounding lugs
can also be provided with Appleton's "STN,"
"STL" and "Female ST" Connectors (refer
to factory).
"STG" Series Liquidtight Neoprene Sealing
Gaskets (Page 10) for use where "ST" fittings are terminated into J.I.C. boxes
or panelboards. Sizes 1 /z" thru 6" fit all
Appleton "ST" series connectors.
The unique Appleton ferrule, long the
industry leader, provides maximum surface
contact for better sealing and grounding and
in preventing sleeving. This exclusive ferrule
design has now been modified even further
by the addition of longer, more pronounced
threads that provide over four times UL
pull-out requirements.
Underwriters Laboratories list all Appleton
ST STB and STN series connectors up to
the 4" size. The 5" and 6" size connectors,
though manufactured to the same rigid
standards, cannot be listed as UL does not
yet recognize or list larger size conduit. They
are suitable for hazardous location use as
covered by the National Electrical Code:
Article 501 -4 (b): Class I, Di v. 2; Article 502-4
(a) 2: Class II, Div. 1 and 2; Article 503-3
(a): Class III, Div. 1 and 2.
1701 W. Wellington Ave.
Chicago, Illinois 60657
Copyright 1990 Printed in U.S.A.
Suitable for Hazardous Location
Class I, Div. 2;
Class II, Div. 1 and 2;
Class III, Div. 1 and 2;
NEC 501-4(b), 502-4(a) (2), 503-3(a)
ST
File #14814A
File #65178
Liquidtight "STB" Insulated Flexible Metal Conduit Connectors
Size
Catalog No.
Wt. Lbs.
Per 100
Ctn.
Qty.
Std.
Pkg.
15.0
16.0
23.0
34.0
25
25
25
5
100
100
50
25
84.0
119.0
170.0
340.0
450.0
530.0
655.0
1200.0
1900.0
5
2
1
1
1
1
1
—
25
10
5
5
5
5
5
1
1
18.0
18.0
30.0
49.0
25
25
25
5
50
50
50
25
102.0
160.0
230.0
760.0
1000.0
1800.0
5
2
1
1
—
—
25
10
5
5
1
1
23.0
24.0
38.0
58.0
25
25
10
5
50
50
50
25
116.0
192.0
282.0
840.0
1100.0
2150.0
5
2
1
1
—
—
25
10
5
5
1
1
Straight
STB-38
STB-50
STB-75
STB-100
Steel 3 /8"—1"
Malleable Iron 1 '/V—6"
3
/8 flex, 1/2 hub
1/2
3/4
1
1</<
STB-125
STB-150
STB-200
STB-250
STB-300
STB-350
STB-400
STB-SOOf
STB-600t
11/2
2
2V2
3
3V2
4
5
6
~
45°
STB-4538
STB-4550
STB-4575
STB-45100
With Steel Caps 3/a"—1"
Malleable Iron %"—4"
3
/s flex, 'A hub
1
A
3/4
1
iv«
11/2
STB-45125
STB-45150
STB-45200
STB-45250
STB-45300
STB-45400
2
2 1 /2
3
4
90°
STB-9038
STB-9050
STB-9075
STB-90100
With Steel Caps3 3/8"—1"
Malleable Iron /e"—4"
U.S. Pat 2,782,060
2,687,767
Can. Pat 507,070
708,255
STB-90125
STB-90150
STB-90200
STB-90250
STB-90300
STB-90400
3
/a flex, 1/2 hub
</2
1
3/4
iy<
1V2
2
2V2
3
4
fUL Listing Not Applicable
Discount Schedule ST
Refer to Pricing Index for Prices.
leton
ELECTRIC COMMNY
Copyright 1988 Printed in U.S.A.
1701 W. Wellington Ave.
Chicago, Illinois 60657
Effective November, 1993 Page 5