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Bostitch Parts

O-ring 850607

OEM part for: Bostitch

Part Number: 850607


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Easy 15-30 minutes (8 rated repairs)?
OEM: Original Equipment Manufacturer ?
Bostitch
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Product Description ?

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.

  • Size: 1.484 X .139
  • Classification: Part
  • Weight: 0.01 lbs.
  • Shipping: Ships Worldwide

Frequently Purchased Together ?

Compatibility

This part will fit the following 28 machines

Bostitch

438S2 Pneumatic Stapler View Diagrams & Manuals
438S2R Pneumatic Stapler View Diagrams & Manuals
438S4 Pneumatic Stapler View Diagrams & Manuals
438S5 Pneumatic Stapler View Diagrams & Manuals
450S2 Pneumatic Stapler View Diagrams & Manuals
WM45B Pneumatic Coil Nailer View Diagrams & Manuals
T55S5 Pneumatic Stapler View Diagrams & Manuals
N57C Coil-Fed Pneumatic Nailer View Diagrams & Manuals
N12B Coil-Fed Pneumatic Nailer View Diagrams & Manuals
RN46 Coil-Fed Pneumatic Roofing Nailer View Diagrams & Manuals
RN45B Coil-Fed Pneumatic Roofing Nailer View Diagrams & Manuals
RN46-1 Coil-Fed Pneumatic Roofing Nailer View Diagrams & Manuals
N55C Coil-Fed Nailer View Diagrams & Manuals
438S2R-1 (Type 0) Pneumatic Stapler View Diagrams & Manuals
438S2-1 (Type 0) 16 Gauge Wide Crown Stapler View Diagrams & Manuals
450S2-1 (Type 0) 16 GA Wide Crown Lathing Stapler View Diagrams & Manuals
N55CD (Type 0) Coil-Fed Nailer View Diagrams & Manuals
N58C (Type 0) Coil-Fed Nailer View Diagrams & Manuals
T55S5 (Type 0) Pneumatic Stapler Power Tool View Diagrams & Manuals
BRN175A (Type 1) Shell 15 Degree Coil Roof Power Tool View Diagrams & Manuals
N12B (Type 0) Coil-Fed Nailer Power Tool View Diagrams & Manuals
N55C (Type 0) Coil-Fed Nailer Power Tool View Diagrams & Manuals
N57C (Type 0) Coil-Fed Nailer Power Tool View Diagrams & Manuals
RN45B (Type 0) Roofing Nailer Power Tool View Diagrams & Manuals
RN46-1 (133450000 and up) Roofing Nailer - C.T Power Tool View Diagrams & Manuals
RN46-1 (17270000 and higher) Roofing Nailer - C.T Power Tool View Diagrams & Manuals
RN46-1 (Type 0) Roofing Nailer - C.T Power Tool View Diagrams & Manuals
WM45B (Type 0) Coil Nailer Power Tool View Diagrams & Manuals
Show More Compatible Models
Don't see yours? Try searching our site for :

This item works with the following types of products:

  • Stapler Parts
  • Nailer Parts

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
    t
    t
    t - t days ago Verified Purchase
    eReplacementParts Team
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    Questions & Answers ?

    Our customer Service team is at the ready daily to answer your part and product questions.

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    We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.

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    Questions & Answers for O-ring


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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.

    Easy 15-30 minutes (8 rated repairs)?

    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

    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.
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    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
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    Bumper crack and oring broken

    Luis - April 5, 2020
    Tool Type

    Nailer

    Difficulty

    Easy

    Time

    Less than 15 minutes

    Tools Used

    Power Drill

    Everything good and easy
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    O-ring broke and bumper completely shattered

    Allen - January 15, 2020
    Tool Type

    Nailer

    Difficulty

    Medium

    Time

    15-30 minutes

    Tools Used

    , Allen wrench

    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.
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    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
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    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
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    Worn bumper and o-ring

    Ronald - August 28, 2016
    Tool Type

    Nailer

    Difficulty

    Easy

    Time

    15-30 minutes

    Tools Used

    , Allen wrench and punch

    Removed head
    Punched out piston from the bottom
    Cleaned out cylinder
    Installed new parts
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

    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.
    Did you find this story helpful?
    Thanks for voting and helping fellow customers!

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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.

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