Easy
15-30 minutes
Genuine Bostitch replacement part, this item is sold individually.
The 850607 is used in the Bostitch pneumatic tools shown below.
It is used in different areas of some of these tools..
The most popular is being installed on the piston of most of the nail guns shown to help create a seal.
On the Staplers it is installed on the cylinder, also to create a seal.
Over time seals will wear and crack and need to be replaced.
O-ring 850607
OEM part for: Bostitch
Part Number: 850607
$5.82
In Stock
Ships within 1 business day 
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Product Description ?
- Size: 1.484 X .139
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This O-ring will fit the following 29 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 29 matching models.
Bostitch
Show More Compatible Models29 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Bostitch
This item works with the following types of products:
- Nailer
- Stapler
Repair Videos ?
Watch the Repair Video for
O-ring
Customer Part Reviews ?
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Great company to order from...
Would order from them again..
Guest -
August 7, 2019
Verified Purchase
repair of roofing nail gun
just what was needed to complete the rebuild of our roofing gun.
Guest -
June 7, 2019
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.
Was leaking air at trigger and driver would not return
Ryan - July 4, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench, hammer and punch
Parts Used
Remove top cover pull out driver and replaced the piston o-ring. Then followed the instructions included with the trigger kit. Then put it back together.
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O rings were bad
Richard - January 21, 2022
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Power Drill
Used a cordless drill to take the screws out and replaced the bad o rings
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Bumper crack and oring broken
Luis - April 5, 2020
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Power Drill
Parts Used
Everything good and easy
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O-ring broke and bumper completely shattered
Allen - January 15, 2020
Tool Type
Nailer
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
1. Removed the 4 screws that hold the back cap on.
2 pulled out the driver/piston
3. Used compress air to clean out all the debris from the shattered bumper.
4. Installed new parts. O-ring, bumper, guide
5. Used air tool oil to lube up new parts
6. Reassembled the back cap using the 4 Allen screws
7. Tested nailer and works perfectly.
2 pulled out the driver/piston
3. Used compress air to clean out all the debris from the shattered bumper.
4. Installed new parts. O-ring, bumper, guide
5. Used air tool oil to lube up new parts
6. Reassembled the back cap using the 4 Allen screws
7. Tested nailer and works perfectly.
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Missing the pins that hold trigger,trigger valve assembly leaking,,,obtained trigger valve assembly locally
Domingo - January 26, 2017
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, metric allen wrench, roll pin punch, curved pointed probe
1. Removed trigger valve assembly by connecting air hose to roofing nailer,,,the pins were missing so valve assembly popped right off
2. Lubed new trigger valve assembly with air tool grease and inserted valve in body,noting that the grooves on trigger valve assembly lined up with pins that hold it in
3. Using the roll pin punch of correct diameter,drove the pins in that hold the valve assembly and the trigger
4. Remove firing valve and removed the driver, cleaned cylinder, cleaned driver and installed new o ring on driver piston
5.Installed new cap gasket/seal and torqued the four cap screws,,,
6. Loaded nails in roofing nailer and tested it on piece of 2X4,,worked perfect,,very important to install the driver in correct position,,,failure to do so could break the hardened steel driver
2. Lubed new trigger valve assembly with air tool grease and inserted valve in body,noting that the grooves on trigger valve assembly lined up with pins that hold it in
3. Using the roll pin punch of correct diameter,drove the pins in that hold the valve assembly and the trigger
4. Remove firing valve and removed the driver, cleaned cylinder, cleaned driver and installed new o ring on driver piston
5.Installed new cap gasket/seal and torqued the four cap screws,,,
6. Loaded nails in roofing nailer and tested it on piece of 2X4,,worked perfect,,very important to install the driver in correct position,,,failure to do so could break the hardened steel driver
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Wasn't feeding nails properly, driver not staying up
Tom - January 22, 2017
👍 1 of 2 people found this instruction helpful
Tool Type
Nailer
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, Allen wrenches
New O-ring on driver, new spring and o-ring on feeder. Once I did the first gun, the next 3 guns went real easy
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Worn bumper and o-ring
Ronald - August 28, 2016
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench and punch
Parts Used
Removed head
Punched out piston from the bottom
Cleaned out cylinder
Installed new parts
Punched out piston from the bottom
Cleaned out cylinder
Installed new parts
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Driver would not return & nails wouldn't feed.
Guy - August 19, 2016
Tool Type
Nailer
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set, Nutdriver, Hammer & provided punch to remove roll pins
Removed the defective parts and replaced the with new.
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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.
