Cut Sheet

www.tnb.ca
B9
Industrial Fittings
T&B
®
Fittings
Locknuts
Cat. No.
Size (in.)
Dimensions (in.)
Stl. or M.I. Alum. SST A B
139*
†
— —
1/4 27/32 5/32
140* — —
3/8 15/16 5/32
141** 141AL 141SST
1/2 1-7/64 5/32
142-TB** 142AL 142SST
3/4 1-3/8 3/16
143 143AL 143SST
1 1-11/16 13/64
144 144AL 144SST
1-1/4 2-5/32 13/64
145 145AL 145SST
1-1/2 2-1/2 13/64
146-TB 146AL 146SST
2 3 7/32
147 147AL —
2-1/2 3-9/16 13/32
148 148AL —
3 4-3/16 13/32
149 149AL —
3-1/2 4-13/16 15/32
150 150AL —
4 5-5/16 15/32
151 151AL —
4-1/2 5-15/16 17/32
152 152AL —
5 6 -1/2 17/32
153 153AL —
6 7-3/4 17/32
* Hex shape
** Case hardened locknuts
Aluminum locknuts comply with federal standard of copper-free aluminum; less than 0.4% copper
For Dura-Plate
®
finish, add prefix 040- to Cat. No. Consult your Regional Sales Office for details
†
Not UL or CSA certified
Bonding Locknuts
Cat. No. Size (in.) Screw Size (in.)
Dimensions (in.)
A B
106
1/2
8-32 x 7/16
1-3/8 0.125
107
3/4 1-5/8 0.140
108
1 1-15/16 0.170
109
1-1/4 2-5/32 0.170
110-TB
1-1/2 2-1/2 0.170
111
2 3 0.187
112-TB
2-1/2
1/4-20 x 5/8
3-13/32 0.375
113-TB
3 4-13/16 0.375
114
3-1/2 4-29/32 0.438
115-TB
4 5-7/16 0.438
For Dura-Plate
®
finish, add prefix 040- to Cat. No. Consult your Regional Sales Office for details
Steel finish: zinc plated
Fittings
Cat. No. Size (in.)
Dimensions (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 19/64
Steel finish: zinc plated
Rigid and Intermediate Metal Conduit Fittings
(B) Thickness
A
Steel or malleable iron (steel thru 2 in.)
Use anywhere an ordinary locknut is installed to ensure positive bonding of
conduit to box and prevent loosening due to vibration. Also can be used for
Service Entrance applications in conformance with Code. T&B rigid conduit and
EMT (thinwall) fittings comply with Federal Specification WF 408c.
A
C
B
Molded Santprene Seal / Colour: Blue
Provides positive seal against water and oil. For use with rigid and intermediate
metal conduits, or fittings to provide watertight or raintight seal at all enclosures.
NPS threads..
(B) Thickness
A
Steel or malleable iron (steel thru 2 in.)
or Aluminum 624
Many of the T&B standard conduit and cable fittings are furnished with “case
hardened locknuts”. This exclusive feature means the locknut tightens up against
the box without deforming; the locknut bites into the box providing a positive
ground; the fitting can be tightened from outside the box