Dead Air Wolverine Thread Insert

14-1mm LH
This is the most common thread pitch for eastern European pattern AK™s and the majority of US made / parts kit barrels. Common examples:
WASR-10
Century RAS-47
Century C39
Yugoslavian AK™s (Opap / Npap)
Polish kit builds
East German kit builds
Romanian kit builds
Russian kit builds (7.62×39)
Bulgarian (milled)

24-1.5mm RH
Common thread pitch for AK-74 rifles. These threads are on the gas/front sight block, not on the barrel. Examples:
Russian or Bulgarian AK-74™s
Russian or Bulgarian œKrinkov AKS-74U
All Arsenal / Kvar AK™s (7.62×39 or 5.45×39)

26-1.5 mm LH
This is primarily a Yugo thread pitch used on their AK pistols Pap92/M85. The threads are on the gas/front sight block, not on the barrel.