See part B-47 in the diagram
( Grid squares measure 1x1 inch )
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O-RING 850607
Fits your 18990!
$11.34
In Stock
Fits your 18990!
PartSelect Number
PS12499532
Manufacturer Part Number
850607
Manufactured by
DeWALT
Product Description
O-RING Specifications
This replacement seal is designed for use in a variety of pneumatic tools, including both nail guns and staplers. It serves a vital function by creating an airtight seal—most commonly installed on the piston in nail guns and on the cylinder in staplers. This helps maintain consistent air pressure and tool performance. Over time, seals can wear out, crack, or lose their elasticity, which may lead to reduced efficiency or air leaks. If your tool is underperforming, replacing worn seals like this one can help restore its functionality. This seal is sold individually and measures 1.484 inches in outer diameter with a thickness of 0.139 inches, ensuring a snug and reliable fit during installation.
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Troubleshooting
This part works with the following products:
Nailer.
This part works with the following products:
Bostitch, Craftsman, DeWALT, Porter Cable.
Part# 850607 replaces these:
850607, P850607
Questions and Answers
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Model Cross Reference
This part works with the following models:
PartSelect Number: PS12499532
Manufacturer Part Number: 850607
Manufacturer Part Number: 850607
Brand
Model Number
Description
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