Easy
15-30 minutes
This is an authentic manufacturer approved replacement part designed for use with nailers. It helps to provide an air tight seal for the piston. It is made out of rubber material and it is sold individually. To complete this repair you will need a hex key/allen wrench.
O-ring 851606-S
OEM part for: Bostitch, Porter Cable, Black and Decker
Part Number: 851606-S
$6.69
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 46 machines
Bostitch
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Porter Cable
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Black and Decker
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Show More Compatible Models
This item works with the following types of products:
- Nailer Parts
This part replaces obsolete part #: 851606
Repair Videos ?
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O-ring
Customer Part Reviews ?
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fitted perfectly, took some time to arrive though !
Arrived in perfect condition however took some time to arrive, ereplacment kept me updated though !
iGlobal -
November 25, 2020
Verified Purchase
parts work great
parts work great
Guest -
November 20, 2020
Verified Purchase
O ring main part
the O - Ring the main part of any fix if it leaks change the O - Ring
Guest -
May 31, 2019
Verified Purchase
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
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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 and random nail fire when connecting air hose
Alan - April 18, 2023
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench, pick tool, silicone grease
Replaced all of the internal o-rings. A complete rebuild kit is no longer available. I also replaced the trigger assembly. My Bostitch nail gun now works like new again!
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Air was leaking from the top.
Charles - November 2, 2018
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
Removed the screws from the cap
Removed the worn o-ring
Installed the new o-ring
Cleaned and lubed the internal parts of the nail gun
Replaced the cap
Removed the worn o-ring
Installed the new o-ring
Cleaned and lubed the internal parts of the nail gun
Replaced the cap
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Air Leak at top, Nail would not set, Driver would not returrn
donald - April 10, 2018
Tool Type
Nailer
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Wrench Set
1 Removed top replaced O ring.
2 Instructions came with Trigger Valve Kit very easy to replace old valve .
3 Assembly, Trip Foot did not require any tools ,just pushed it in place.
2 Instructions came with Trigger Valve Kit very easy to replace old valve .
3 Assembly, Trip Foot did not require any tools ,just pushed it in place.
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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.
