Easy
15-30 minutes
Genuine OEM replacement part, this item is sold individually.
The purpose of this part is to keep air pressure in the cylinder of the tools listed below.
If you have an air leak in your pneumatic tool it is a good practice to replace the O-ring and seals.
Piston Ring N905972
OEM part for: Bostitch, Porter Cable, DeWALT
Part Number: N905972
$4.99
In Stock
Ships within 1 business day 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 25 machines
Bostitch
BT1855 Oil-Free Brad Nailer View Diagrams & Manuals
SX1838 Pneumatic Brad Nailer & Stapler View Diagrams & Manuals
SL1838BC (Type 0) Cap Stapler View Diagrams & Manuals
BT1855K (Type 0) 18 Gauge Brad Nailer View Diagrams & Manuals
SX1838K (Type 0) Oil-Free Stapler View Diagrams & Manuals
EHF1838K (Type 0) Flooring Stapler View Diagrams & Manuals
LHF2025K (Type 0) Flooring Stapler View Diagrams & Manuals
BTFP12233 (Type 1) Smart Point 18 GA Brad Nailer Kit View Diagrams & Manuals
EHF1838K (161200001 and higher) Stapler Power Tool View Diagrams & Manuals
LHF2025K (161200001 and higher) Stapler Power Tool View Diagrams & Manuals
SL1838BC (151230000 > higher) Cap Stapler Power Tool View Diagrams & Manuals
SL1838BC (161200001 > higher) Cap Stapler Power Tool View Diagrams & Manuals
BT1855K (10152000 and Higher) 18ga Brad Nailer - 2 Power Tool View Diagrams & Manuals
BT1855K (12340000 and Higher) 18ga Brad Nailer - 2 Power Tool View Diagrams & Manuals
BTFP12233 (15150000 and higher) 18ga Brad Nailer Kit 2-1 Power Tool View Diagrams & Manuals
BTFP12233 (20003001 AND HIGHER) 18ga Brad Nailer Kit 2-1 Power Tool View Diagrams & Manuals
Porter Cable
BN200C Type 1 Brad Nailer View Diagrams & Manuals
NS150C Type 1 18G Stapler View Diagrams & Manuals
DeWALT
DWFP12232 (Type 0) 18 Gauge 1-1/2" x 1/4" Narrow Crown Stapler View Diagrams & Manuals
DWFP12231 (Type 0) 18 Gauge 2" Brad Nailer View Diagrams & Manuals
DWLHF2025K (Type 0) 20ga Engr Floor Stap View Diagrams & Manuals
DWEHF1838K (Type 0) 18ga 7/32 Crwn Flr S View Diagrams & Manuals
DWFP12233 (Type 1) 18 Guage Brad Nailer View Diagrams & Manuals
DWFP1838 (Type 1) 18ga 1-1/2 Stapler View Diagrams & Manuals
DWFP12233 (20003001) 18 Ga Precision Point Finish Nailer Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Nailer Parts
- Stapler Parts
This part replaces obsolete part #: 180457
Repair Videos ?
Watch the Repair Video for
Piston Ring
Articles:
|
Step-by-step instructions for removing and installing the piston ring on your DeWALT brad nailer. ...
July 30, 2018
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Customer Part Reviews ?
Average Rating (out of 5):
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Parts for dewalt
Works great fast shipping
Fred -
June 22, 2023
Verified Purchase
Great company , my go to for parts, help videos are why I support them.
Great company , my go to for parts, help videos are why I support them.
Guest -
April 6, 2023
Verified Purchase
Easy repair
Fast delivery and great product
Guest -
March 13, 2022
Verified Purchase
easy repair, part was a perfect fit
this piston ring fit easily on the piston and immediately solved my problem
Guest -
November 17, 2021
Verified Purchase
Nail gun works now
Parts fit perfectly and delivery was quick.
Guest -
February 15, 2021
Verified Purchase
Will use them again.
Correct part and fast service.
Guest -
January 4, 2021
Verified Purchase
Nail gun repair
Arrived fast and all parts fit perfect.
Guest -
September 30, 2020
Verified Purchase
product repair
Piston ring worked grea, no issues what so ever.
Guest -
September 16, 2020
Verified Purchase
The right part all the time
All the parts I have recieved are the exact parts got all the tools and equipment I repaired. They have original diagrams to assure that. Thank you for prompt delivery, even across the country to Florida.
Robert W -
April 24, 2020
Verified Purchase
Save cash and down time!
Super easy repair. Brad nail gun works great again.
Guest -
April 6, 2020
Verified Purchase
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t days ago
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.
Striker wouldn't retract all the time
Scott - September 6, 2017
👍 4 of 5 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, 3 mm Allen wrench
Parts Used
1. Removed four allen screws from top of brad nailer.
2. Removed striker from piston
3. Replaced piston ring
4. Reassembled brad nailer.
Watched a video on You Tube regarding brad nailer failure. Disassembly and repair was super easy and my part failure was the one listed on eReplacementParts.com website as the most common cause of the tool's symptom. Very helpful.
2. Removed striker from piston
3. Replaced piston ring
4. Reassembled brad nailer.
Watched a video on You Tube regarding brad nailer failure. Disassembly and repair was super easy and my part failure was the one listed on eReplacementParts.com website as the most common cause of the tool's symptom. Very helpful.
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Driver won't return
John - July 16, 2017
👍 2 of 2 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Removed the the frame cap.
Pulled out the cylinder sleeve.
Pushed out the piston drive.
Removed and replaced the piston ring.
Assembled the nailer.
Tested the nailer - tested OK.
Pulled out the cylinder sleeve.
Pushed out the piston drive.
Removed and replaced the piston ring.
Assembled the nailer.
Tested the nailer - tested OK.
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Driver wouldn't rebound/reset behind nail head. Thus, it wouldn't set/shoot
Colin - March 8, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers, Allen wrench
If you've already diagnosed the issue, mine being that the nail gun wouldn't fire a nail, then this repair is very simple. I have the Bostitch BT-1855 18 gauge nailer. First you will need to remove the cap and (4) Allen head screws at the rear of the gun (part #181917, or item 2 if you are looking at your factory schematic which is the exploded diagram. Once you have removed the cap be sure to set aside the frame cap gasket (item 3, part #175682). Concealed inside the cap are items 4-9 on your schematic. You should see a clear bumper, spring and O-rings. You shouldn't need to replace these. You will need to remove and replace items 10-16 on your schematic. They are as follows: 10-piston driver (#180451) 11-piston ring (#180457), 12-cylinder sleeve (#180458), 13-O-ring (#180459), 14-check seal (#180460), 15-bumper (#180461), 16-driver guide (#180462). I pulled everything out and lined it up just as it went into the nailer, so as not to forget the original placement and mechanics. Remove your replacement parts from their packaging. Assemble items 10-16 together, then place the completed assembly into the gun; rather than putting each individual item back in place. Reattach frame cap seal and frame cap. Test fire gun. All told it should take about 15-30 minutes to complete this repair. You should only need the appropriate size Allen wrench and maybe a small flat head screw driver for prying some of the O-rings out.
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Piston driver small tip becomes bent or chipped
Jerome - March 21, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Hex Driver
Parts Used
I was unable to find the correct repair part from the Big box suppliers. I looked on eReplacement parts and the photo looked like the part needed. The right part made the repair easy. Remove the 4 top hex screws loosen the front cover screws to allow the bent tip enough clearance use needle nose pliers to pull the piston out. Install the new piston ring apply some light grease to the bore and driver and install groves forward.Replace the cover. Tighten all screws. We had 5 nailer guns waiting for parts.They are all repaired. Thanks eReplacement parts.
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would not fire brads
James - April 18, 2021
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, allen / hex wrench
Parts Used
Removed the top of piston chamber
removed plunger and gasket
removed damaged piston ring
installed new piston ring - snaps into groove
lubricated piston chamber and set plunger assembly back into chamber
re installed gasket and mechanical screws in piston chamber
removed plunger and gasket
removed damaged piston ring
installed new piston ring - snaps into groove
lubricated piston chamber and set plunger assembly back into chamber
re installed gasket and mechanical screws in piston chamber
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would not set nails
Robert - February 22, 2021
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Parts Used
removed srews on to removed old piston and oiled new one sliped it in replaced top works fine
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Rod would not return after firing
James - December 15, 2020
Tool Type
Nailer
Difficulty
Easy
Time
30-60 minutes
Tools Used
Pliers, Hex key wrench
Parts Used
1. Removed 4 hex socket cap screws on top of cylinder
2. Remove piston noting driver orientation
3. Remove old piston ring and broken pieces
4. Carefully install new piston ring on piston
5. Lightly lubricant new piston ring
6. Re-install piston into cylinder
7. Re-install top of cylinder
8. Tighten 4 screws
9. Test operation
2. Remove piston noting driver orientation
3. Remove old piston ring and broken pieces
4. Carefully install new piston ring on piston
5. Lightly lubricant new piston ring
6. Re-install piston into cylinder
7. Re-install top of cylinder
8. Tighten 4 screws
9. Test operation
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Plunger wouldn't return
James - October 28, 2019
Tool Type
Nailer
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Allen set
Parts Used
Took it apart put the New Ring on put it back together and it worked. Simple
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Old ring was cracked
Kevin - February 27, 2019
Tool Type
Stapler
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Took off the head pulled piston out removed broken ring and put the new one on
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Wouldn't eject nail
Michael - June 20, 2018
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Removed the screws holding the top cap on
Replaced O-ring and piston ring and worked great!
Replaced O-ring and piston ring and worked great!
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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.
