Easy
15-30 minutes
This o-ring is an authentic manufacturer sourced replacement part designed for use with Porter Cable angle grinders. It is sourced directly from original equipment manufacturer. It is the rubber o-ring for the metal seal. Please refer to appropriate diagram for correct location and application of this item. It is made from durable rubber material and it is sold individually. To complete this repair you will need a hex key also known as an allen wrench.
O-ring 904747
OEM part for: Porter Cable
Part Number: 904747
$8.60
In Stock
Ships within 1 business day 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 2 machines
Porter Cable
DA250B 15 Gauge Angle Nailer View Diagrams & Manuals
DA250B (Type 1) Finish Nailer Power Tool View Diagrams & Manuals
This item works with the following types of products:
- Nailer Parts
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PC Finish nailer repairs
My finish nailer suddenly began leaking air, the parts I purchased were replacement parts to repair my nailer. They fit perfectly and I am now back in business.
Guest -
March 24, 2023
Verified Purchase
Easy fast repair!!
The parts I ordered arrived days ahead of the scheduled date. They were right on with the suspected problem and everything went like clockwork. I certainly would buy from them again.
Guest -
September 30, 2020
Verified Purchase
Parts fit perfectly
I wasn’t sure what part was bad on my nail gun, so I bought the 4 pcs most likely to cause issues. Very affordable and now all seals and o-rings are new.
Guest -
April 9, 2020
Verified Purchase
Better service than others for Equipment Repairs
Their system helps to identify the parts you may need based on your tool’s symptoms; order is filled and shipped immediately; and quick and easy returns for parts you don’t need.
Guest -
March 3, 2020
Verified Purchase
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Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Air leak. Nailer inoperative
Timothy - November 20, 2022
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Removed back of gun
Removed broken seal and o-ring
Cleaned all debris
Oiled parts and sealing surface
Installed new parts
Placed back on
Test fired nailgun
Success
Removed broken seal and o-ring
Cleaned all debris
Oiled parts and sealing surface
Installed new parts
Placed back on
Test fired nailgun
Success
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Leak in top
J - July 17, 2021
Tool Type
Nailer
Difficulty
Medium
Time
1-2 hours
Tools Used
Wrench Set
Needed a plastic gasket and 2 O-rings. Got the O-rings first and then realized I needed the plastic gasket.. It was obvious to see because the old gasket was in pieces
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air Venting out top of gun
JASON - April 23, 2020
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
took top of gun off and after cleaning out bad seal, replaced it and one o ring.
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Blowing air out to[
Steve - May 28, 2018
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
Super simple 4 allen bolts and all good. About $40 in parts and I have a nailer working that would of cost me $150 to replace
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Air blowing out of top of nail gun
Steve - May 16, 2018
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen Wrench
Parts Used
Changed out seal and o-ring. Easy and for $38 nailer works better then ever and saved the price of a new gun
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Air finish nailer leaking air
Larry - October 11, 2017
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Removed the back cover ( 4 allen head screws ) installed the new O ring and collar, replaced cover and continued with my nailing project.
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Worn seals and o-rings
ronald - December 22, 2016
Tool Type
Nailer
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Allen wrench
Removed the four screws from the top cover
Removed and replaced the worn parts listed
Cleaned the inside of the gun and oiled it
Screwed the top cover back on
Tested it, works like new
Removed and replaced the worn parts listed
Cleaned the inside of the gun and oiled it
Screwed the top cover back on
Tested it, works like new
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Air leaking due to bad seals
Eric - August 21, 2016
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen Wrench
I opened the gun and replaced the parts, closed it back up and used the nailer
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Air blowing through tool
Arlon - June 27, 2016
Tool Type
Nailer
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Hex wrench
Took the top off; saw the broken part immediately; replaced other visible o-rings while I was in there.
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OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
