Common O ring kits and trigger valve kits for Bostitch tools Wilson October 03, 2020 18:18 Please see attachment for common O ring kits (ORK) and trigger valve kits (TVA) for Bostitch tools. Related articles How do I know if I have a Fixed Exhaust or a Multi-Directional Exhaust tool? My Bostitch pneumatic tool leaks air from the trigger area when I actuate the trigger, and the tool will not cycle. When the trigger is released, the leak will stop. What are the most common causes? N62FN trigger valve Where can I purchase repair parts for my Bostitch tools? FN15 Series - 15 GA angled finish nails spec sheet Comments 0 comments Please sign in to leave a comment.