Why is there an expiration date on the gas fuel for my cordless tools? Support October 03, 2020 18:18 There is an expiration date on the gas cylinders used with Bostitch Cordless Nailers that can be found at the top, just below the cap. When a cylinder reaches this expiration date, it can lose effectiveness and pressure. Related articles My pneumatic nailer / stapler will no longer drive the fastener completely; it seems to be losing power. Can this be repaired? How can I tell when my Bostitch tool was manufactured? How much does the GFN1564K cordless finish nailer weigh? Why is there an expiration date on the gas fuel for my cordless tools? Comments 0 comments Please sign in to leave a comment.