Medium
30-60 minutes
This replacement o-ring is a high quality item that is specially produced for Dewalt framing nailers. It is used to provide an air tight seal between the bumper and the collar. For correct location and application of this part please make sure to check appropriate diagrams. Note that this rubber o-ring is sold individually.
O-ring 390146-00
OEM part for: DeWALT
Part Number: 390146-00
$5.19
In Stock
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Compatibility
This part will fit the following 18 machines
DeWALT
D51823 Type 1 Clipped Head Framing Nailer View Diagrams & Manuals
D51823 Type 2 Clipped Head Framing Nailer View Diagrams & Manuals
D51823 Type 2A Clipped Head Framing Nailer View Diagrams & Manuals
D51845 Type 1 Round Head Framing Nailer View Diagrams & Manuals
D51845 Type 2 Round Head Framing Nailer View Diagrams & Manuals
D51845 Type 2A Round Head Framing Nailer View Diagrams & Manuals
D51822 Type 1 Clipped Head Framing Nailer View Diagrams & Manuals
D51844 Type 1 Round Head Framing Nailer View Diagrams & Manuals
D51822 Type 3 Framing Nailer View Diagrams & Manuals
D51823 Type 3 Framing Nailer View Diagrams & Manuals
D51844 Type 3 Framing Nailer View Diagrams & Manuals
D51845 Type 3 Framing Nailer View Diagrams & Manuals
D51822 Type 2 Framing Nailer View Diagrams & Manuals
D51822 Type 4 Framing Nailer View Diagrams & Manuals
D51844 Type 2 Framing Nailer View Diagrams & Manuals
D51844 Type 4 Framing Nailer View Diagrams & Manuals
D51822 (Type 5) Lawnedger Power Tool View Diagrams & Manuals
D51844 (Type 5) Lawnedger Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Nailer Parts
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Got the right part at the right price, much faster then expected.Great Service.
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February 6, 2021
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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.
Nailer was leakkng air & wouldn't fire.
Michael - February 19, 2020
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Torx set, snap ring pliers
Took it apart, cleaned it up. Replaced all the o-rings & seals. Pretty simple repair. The parts diagram on your website was perfect. Helped me order the correct parts.
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Air nailer would not cycle.
Michael - July 10, 2017
Tool Type
Nailer
Difficulty
Easy
Time
30-60 minutes
Tools Used
Nutdriver, Hammer and punch to remove and replace roll pins in trigger
Parts Used
1. Removed the piston and the bulkhead.
2. Replaced the o-ring, found a leak at the trigger.
3. Took it apart and replaced the o-ring in it. Works fine now.
2. Replaced the o-ring, found a leak at the trigger.
3. Took it apart and replaced the o-ring in it. Works fine now.
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Leaking air
Kenneth - December 29, 2016
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
Remove the top cap
Remove the split o-ring
Install the new o-ring
Clean the inside of the gun and oil it
Place the cap back on
Remove the split o-ring
Install the new o-ring
Clean the inside of the gun and oil it
Place the cap back on
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Air leaking out of nose
Michael - September 1, 2016
Tool Type
Nailer
Difficulty
Hard
Time
1-2 hours
Tools Used
, Allen wrenches, screw driver
Removed the top cap of the nail gun. Then removed the cylinder. Located 3 o-rings that were worn and stretched. Removed the them and replaced them with the new parts. And thoroughly cleaned and oiled the gun. Then reassembled it. It shoots like a new gun.
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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.
