Allows side mounting of nut to threaded rodReduces the need for threading compared to standard nuts and washersWorks with slightly damaged threads and minor burrs on the threaded rod
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Spec Sheet
https://static.graybarcanada.com/Products/Rough-In%20Products/Rough%20In%2C%20Tapes%2C%20Fasteners/ERISN37/Files/ERISN37_Files.pdf