Arlington SB13 Non-Metallic Bushings for 2 x 4 Metal Studs Non-metallic bushing snaps into standard knockout and fixes into common hole configurations
These bushings fit existing irregular shaped holes in metal studs, alleviating the need to
punch new holes in the metal studs, weakening the structural member. Use these bushings
to comply with paragraph 300.4(b)(1) of the 2020 NEC code which states that: “In both
exposed and concealed locations where non-metallic sheathed cables pass through either
factory or field punched, cut, 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.