Cut Sheet

Rigid and Intermediate Metal Conduit Fittings
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!
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
Molded Santoprene Seal
Color: Blue
B
C
A
(B) Thickness
DIMENSIONS (IN.)
CAT. NO. SIZE (IN.) A B
106
†
1
⁄2 1
3
⁄8 .125
107
†
3
⁄4 1
5
⁄8 .140
108 11
15
⁄16 .170
109 1
1
⁄4 2
5
⁄32 .170
110 1
1
⁄2 2
1
⁄2 .170
111 2 3 .187
112
†
2
1
⁄2 3
13
⁄32 .375
113
†
34
13
⁄16 .375
114
†
3
1
⁄2 4
29
⁄32 .438
115
†
45
7
⁄32 .438
DIMENSIONS (IN.)
CAT. NO. SIZE (IN.) A B C
141SL
1
⁄2 1.140
1
⁄8
1
⁄4
142SL
3
⁄4 1.420
5
⁄32
9
⁄32
143SL 1 1.770
11
⁄64
9
⁄32
144SL 1
1
⁄4 2.281
11
⁄64
5
⁄16
145SL 1
1
⁄2 2.598
11
⁄64
9
⁄32
146SL 2 3.175
3
⁄16
7
⁄64
UL File No. E-23018
CSA File No. 2884
CAT. NO. DIMENSIONS (IN.)
STL./M.I. ALUM. ST. STL. SIZE (IN.) A B
139* — —
1
⁄4
3
⁄4
9
⁄64
140* — —
3
⁄8
15
⁄16
9
⁄64
141** 141AL 141-SST
1
⁄2 1
7
⁄64
5
⁄32
142** 142AL 142-SST
3
⁄4 1
3
⁄8
3
⁄16
143 143AL 143-SST 11
11
⁄16
13
⁄64
144 144AL 144-SST 1
1
⁄4 2
5
⁄32
13
⁄64
145 145AL 145-SST 1
1
⁄2 2
1
⁄2
13
⁄64
146 146AL 146-SST 23
7
⁄32
147 147AL — 2
1
⁄2 3
9
⁄16
13
⁄32
148 148AL — 34
3
⁄16
13
⁄32
149 149AL — 3
1
⁄2 4
13
⁄16
15
⁄32
150 150AL — 45
5
⁄16
15
⁄32
151 151AL — 4
1
⁄2 5
15
⁄16
17
⁄32
152 152AL — 56
1
⁄2
17
⁄32
153 153AL — 67
3
⁄4
19
⁄32
* Hex shape
** Case hardened locknuts
Aluminum locknuts comply with federal standard of copper-free aluminum;
less than .5% copper.
Available with DURA-PLATE
®
Finish.
UL File E-23018
CSA File No. 2884
† Not CSA certified.
Available with DURA-PLATE
®
Finish.
UL File No. E-3060
CSA File No. 638
• Steel from
1
⁄4" to 2", malleable iron from 2
1
⁄2" to 6"
• Aluminum 624 or Type 304 stainless steel all sizes
Locknuts
Provides positive seal against water and oil.
(B) Thickness
A
• For use with rigid and intermediate metal conduits or fittings
• Provides watertight or raintight seal at all enclosures
Sealing Locknuts
A-5
United States
Tel: [phone]
800.816.7809
Fax: [phone]
Technical Services
Tel: [phone]
www.tnb.com