Arlington SB130 Metal Stud Bushings, 100-Pack

"Arlington SB130-100 Metal Stud Bushings, 100 pack. Arlington's patented non-metallic bushings fit existing irregular shaped holes in metal studs, alleviating the need to punch holes in metal studs, weakening the structural member. 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 If a punched hole is required, the SB13 can be installed in a standard 1 Inch trade size, round punched hole (1-3/8 Inch diameter) Snap the bushing end into the hole. Use these bushings to comply with paragraph 300-4(b) (1) of the 2005 NEC code which states that: In both exposed and concealed locations where nonmetallic-sheathed cables pass through either factory or filed 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 Inch"