Thomas & Betts Bushings, Nipples, Locknuts, Plugs Catalog Page
Bushings, Nipples, Locknuts and Plugs
Available in your choice of steel/malleable
iron, aluminum or stainless steel.
Ensures positive bonding of conduit to box
and prevents loosening due to vibration!
Conduit & Fittings — T&B
Locknuts
• Steel from 1⁄4" to 2", malleable iron from 21⁄2" to 6"
• Aluminum 3003 from
stainless steel from 1⁄2" to 2"
CAt. No.
StL./M.i. ALuM. St. StL. A B
139* — —
140* — —
141** 141AL 141-SSt
142** 142AL 142-SSt
143 143AL 143-SSt 1 111⁄16
144 144AL 144-SSt 11⁄4 25⁄32
145 145AL 145-SSt 11⁄2 21⁄2
146 146AL 146-SSt 2 3
147 147AL — 21⁄2 39⁄16
148 148AL — 3 43⁄16
149 149AL — 31⁄2 413⁄16
150 150AL — 4 55⁄16
151 151AL — 41⁄2 515⁄16
152 152AL — 5 61⁄2
153 153AL — 6 73⁄4
*Hex shape
**Case hardened locknuts
Aluminum locknuts comply with federal standard of copper-free aluminum;
less than .5% copper.
Available with DURA-PLATE
UL File E-23018
CSA File No. 2884
1
⁄2" to 6" or Type 304
®
Finish.
SizE (iN.)
1
⁄4
3
⁄8
1
⁄2 17⁄64
3
⁄4 13⁄8
A
(B) Thickness
DiMENSioNS (iN.)
3
⁄4
15
⁄16
Bonding Locknuts
• Steel or malleable iron (steel through 2")
• Can be used anywhere an ordinary locknut is installed
• Also can be used for Service Entrance applications
in conformance with code
• T&B rigid conduit and EMT (thinwall) fittings comply
with Federal Specification A-A-50553
A
9
⁄64
9
⁄64
5
⁄32
3
⁄16
13
⁄64
13
⁄64
13
⁄64
7
⁄32
13
⁄32
13
⁄32
15
⁄32
15
⁄32
17
⁄32
17
⁄32
19
⁄32
CAt. No.
†
106
†
107
SizE (iN.)
1
⁄2 13⁄8 .125
3
⁄4 15⁄8 .140
108 1 1
1
109 1
110 1
⁄4 25⁄32 .170
1
⁄2 21⁄2 .170
111 2 3 .187
†
112
†
113
†
114
†
115
†
Not CSA certified.
Available with DURA-PLATE
UL File No. E-3060
CSA File No. 638
21⁄2 313⁄32 .375
3 413⁄16 .375
31⁄2 429⁄32 .438
4 57⁄32 .438
®
Finish.
DiMENSioNS (iN.)
A B
15
⁄16 .170
(B) Thickness
®
Rigid Fittings
Provides positive seal against water and oil.
Sealing Locknuts
• For use with rigid and intermediate metal conduits or fittings
• Provides watertight or raintight seal
at all enclosures
www.tnb.com
A
B
C
Molded Santoprene Seal
Color: Blue
United States
Tel: 901.252.8000
800.816.7809
Fax: 901.252.1354
CAt. No.
141SL
142SL
SizE (iN.)
1
⁄2 1.140
3
⁄4 1.420
A B C
143SL 1 1.770
144SL 11⁄4 2.281
145SL 11⁄2 2.598
146SL 2 3.175
UL File No. E-23018
CSA File No. 2884
Technical Services
Tel: 888.862.3289
DiMENSioNS (iN.)
1
⁄8
5
⁄32
11
⁄64
11
⁄64
11
⁄64
3
⁄16
1
⁄4
9
⁄32
9
⁄32
5
⁄16
9
⁄32
7
⁄64
E-35
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