Dead Air Wolverine Thread Insert .35 Cal. 14x1LH - Century USA Made GunsThe Dead Air Wolverine Thread Insert in . 35 caliber with a 14x1LH thread pitch is specifically tailored for Century USA made AK firearms. Designed to work with the M14 Collar, this thread insert ensures secure alignment and seamless integration with the Wolverine suppressor. Enhance the versatility and performance of your Wolverine suppressor by adding compatibility with a wide range of Century manufactured AK rifles.