This is a genuine manufacturer sourced replacement part designed for Senco nailers/staplers. This item provides an air-tight seal for the piston assembly. Over time this seal will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of rubber material and it is sold individually. Replacing this item you would need a screwdriver and a tool to remove the old seal. Note, when replacing this seal it is good time to check on condition of other o-rings and seals as well.
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★★★★★
★★★★★
Fit perfectly worked great.
Several air gun parts, all worked as expected. Gun works perfectly.
James - May 4, 2021
Verified Purchase
★★★★★
★★★★★
Parts for finishing nailer
The parts were good. Shipped was good. The service was very excellent. Will be ordering more parts this week for a nother project. Thank you for the great service
Guest - August 25, 2025
Verified Purchase
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Installed all the new seals I ordered. The nylon seal needed to be heated up so it would streach. I put it in a dish of water and microwaved it for one minute on high, that made it just flexible enough to get it on to the piston top.
Took the back of the gun apart, 4 Allen bolts.
Took out the old seal that was dry and broken.
Make sure you put the flat part of the seal towards the front of the gun otherwise it wonGÇÖt seal. I put it on backwards (ItGÇÖs really hard to take it off once you put it on).
Put it back together and worked great!
1. Removed head, then the piston.
2. I used a small flat blade screwdriver to remove remaining seal and o-rings.
3. I removed all internal parts and cleaned them before reassembling the nailer. The new seals and o-rings installed very easily. The finish nailer works like new.
4. The cleaning was optional. But after al
... Read moremost 9 years of use, it needed it.
Removed top and replaced parts as per instructions.
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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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