Common O ring kits and trigger valve kits for Bostitch tools Support October 03, 2020 18:18 Please see attachment for common O ring kits (ORK) and trigger valve kits (TVA) for Bostitch tools. Related articles What nails will fit an N80S or N80SB nailer? Does the GBT1850K offer an adjustable depth control? N62FN trigger valve What types of trigger can the SB-1664FN use? How can I tell when my Bostitch tool was manufactured? Comments 0 comments Please sign in to leave a comment.