Comparable to hex finish nuts but thinner, allowing the nut to "jam" when used with a second nut
A Hex Jam Nut is also known as a Check Nut, Thin Hex Nut, or Thin Nut
Used for clamping nuts together without clamping against another object
Marine Grade 316 Stainless Steel for superior corrosion resistance in saltwater or harsh environments
Secure an item to a fastener without exerting force on it
UNC coarse and UNF Fine thread options available
https://www.taizhouhongchuang.com/stainless-steel-nut/