Easy
15-30 minutes
This is a genuine replacement component that is supplied directly from the original equipment manufacturer for use with Makita finish nailers. It is an identical replacement for a worn or missing part which helps to provide an air-tight seal for the piston head. This high-quality seal is made of durable rubber and is sold individually.
Seal, Air A0311-0191
OEM part for: Makita
Part Number: A0311-0191
$6.59
In Stock
Order within the next 10 hours and your part ships today! 
Compatibility
This part will fit the following 2 machines
Makita
AF632 Finish Nailer View Diagrams & Manuals
AF633 1-1/4" to 2-1/2" 15Ga Finish Nailer View Diagrams & Manuals
This item works with the following types of products:
- Nailer Parts
This part replaces obsolete part #: A343-39
Customer Part Reviews ?
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was just fine
it was easy to install
Guest -
May 22, 2020
Verified Purchase
Air leak on nail gun
Part was recommended to fix problem 100% of the time. Unfortunately part was wrong and didn't fit. :(
Guest -
June 5, 2019
Verified Purchase
eReplacementParts Team
Hi Tim,
Thank you for your review. We are sorry to hear that you received the wrong part. We have contacted you privately regarding this situation.
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
t
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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 leaked from top of nail gun
Mark - September 27, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, 5MM allen wrench
Parts Used
Removed the 4 cover bolts.
Removed what remained of old seal.
Cleaned out debris from old seal.
Installed new seal in recess in cover making sure orientation of new seal was correct,
Installed cap with bolts.
Tested and leak was gone nail gun functioned properly.
Removed what remained of old seal.
Cleaned out debris from old seal.
Installed new seal in recess in cover making sure orientation of new seal was correct,
Installed cap with bolts.
Tested and leak was gone nail gun functioned properly.
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Would not fire nails and continuous air leak
Peter - October 20, 2020
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
After the repair the gun would fire nails but the piston would not return to the top. I found that there was this very small additional air seal above it that is now discontinued to make it return. I was able to use a cabinet drawer silicon button bumper as a temporary seal. I’ll see how long that works I may make one out of sheet rubber or something else at a later date if it fails again.
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Air leak
bob - September 6, 2017
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
Removed the top housing, removed the worn seal, installed the new seal, then replaced the top housing.
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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.
