<https://www.zermattarms.com/?product=12-point-barrel-nut#product>
<http://schema.org/description>
"Available in 1-1/16\"-20 TPI and 1-1/16\"-16 TPI with finish options of bead blasted stainless steel or DLC coated stainless steel.\r\n\r\nAll returned items will be subject to a 20% restocking fee."
<https://www.zermattarms.com/?product=12-point-barrel-nut>