The check seal fits between the o-ring and the cylinder sleeve ring. This is a genuine replacement part sourced from the original manufacturer for use with Bostitch nailers and is available as an individual replacement. It is made out of rubber and will need to be replaced if it breaks. A screwdriver may be needed to help with the replacement of this part.
Replaced all of the internal o-rings. A complete rebuild kit is no longer available. I also replaced the trigger assembly. My Bostitch nail gun now works like new again!
After ordering a complete o ring kit and replacing the o rings I still had the same issue where air was leaking from the exhaust cover. I had to order and replace the head valve o ring again and that took care of the issue.
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Stock Status
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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