Product Overview

C-9
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NM CABLE
These bushings fit existing irregular shaped holes in metal studs, alleviating the need to punch holes
in metal studs, weakening the structural member. Use these bushings to comply with paragraph
300.4(b)(1) of the 2014 NEC code which states that: “In both exposed and concealed locations
where non-metallic-sheathed cables pass through either factory or field punched, cut, or drilled slots
or holes in metal members, the cable shall be protected by bushings or grommets covering all metal
edges and securely fastened in the opening prior to installation of the cable.”
Common hole configurations in metal studs.
CODE VIOLATION
SHARP EDGE
NM CABLE
To install these bushings in an irregular shaped
hole, pass one end of the joined connector through
the hole in the stud. Snap the bushing and the
washer ends together. There’s no need to separate
the two halves.
SB13
1
2
3
B
A
WASHER BUSHING
C
D
Non-Metallic Bushings for Metal Studs
FITS A
STANDARD 1”
KNOCKOUT
INSTALLATION INSTRUCTIONS
If a punched hole is required, the SB13 can
be installed in a standard 1” trade size, round
punched hole (1-3/8” diameter). Snap the
bushing end into the hole.
E161207
LR49636
CATALOG
NUMBER
UPC/DCI/NAED
MFG #018997
STUD
SIZE
UNIT
PKG
STD
PKG
DIM
A
DIM
B
DIM
C
DIM
D
SB13 40115 2 X 4 500 500 5.751 2.500 .505 1.300
SB130 40130 2 X 4 100 100 5.751 2.500 .505 1.300