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18995697-1-M-DeWALT-N905972-PISTON RING
Part Location Diagram of N905972 DeWALT PISTON RING
See part 11 in the diagram
Replacing your Bostitch Nailer PISTON RING
( Grid squares measure 1x1 inch )
18995697-1-S-DeWALT-N905972-PISTON RING 18995697-2-S-DeWALT-N905972-PISTON RING 18995697-3-S-DeWALT-N905972-PISTON RING Part Location Diagram of N905972 DeWALT PISTON RING Replacing your Bostitch Nailer PISTON RING

PISTON RING N905972

Manufactured by:
DeWALT
ERP Number:
ERP18995697
Part Number:
N905972
Original Equipment Manufacturer ?
$5.95
★★★★★
★★★★★
14 Reviews
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(26 rated repairs) ?

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Description Frequently Purchased Together Troubleshooting Repair Videos Reviews Questions & Answers Repair Instructions Model Cross Reference

Product Description

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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.

Frequently Purchased Together

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O RING
★★★★★
★★★★★
(6)
$5.95
In Stock
Minimum Quantity of 2 required
O-RING
★★★★★
★★★★★
(5)
$5.95
In Stock
Minimum Quantity of 2 required
SEAL
★★★★★
★★★★★
(7)
$5.95
In Stock
Minimum Quantity of 2 required
O-RING
★★★★★
★★★★★
(9)
$5.95
In Stock
Minimum Quantity of 2 required
SPRING
★★★★★
★★★★★
(5)
$5.95
In Stock
Minimum Quantity of 2 required
CHECK SEAL
★★★★★
★★★★★
(1)
$5.95
In Stock
Minimum Quantity of 2 required
ASSEMBLY BELT HOOK
$7.88
In Stock
O-RING
★★★★★
★★★★★
(1)
$5.95
In Stock
Minimum Quantity of 2 required
O-RING-44.7MMX2.4MM
★★★★★
★★★★★
(4)
$5.95
Special Order
Minimum Quantity of 2 required
SLEEVE-CYLINDER
$5.95
In Stock
GASKET-END CAP
$5.95
Special Order
Minimum Quantity of 2 required
ASSMBLY PISTON DRIVER
$14.15
In Stock
GASKET-FRAME/CAP
$5.95
In Stock
Minimum Quantity of 2 required
CYLINDER SLEEVE
$5.95
In Stock
FRAME/CAP GASKET
$5.95
In Stock
Minimum Quantity of 2 required

Troubleshooting

This part works with the following brands:
  • Bostitch
  • DeWALT
  • Porter Cable
  • Craftsman
This part works with the following products:
  • Nailer
Part# N905972 replaces these:
180457, N905972, P180457,

Videos For installing this part.

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Replacing your PISTON RING
Replacing your PISTON RING
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Customer Part Reviews

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4.9
Average Rating (out of 5):
★★★★★
★★★★★
(14 Reviews)
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    13
  • 4 stars
    1
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★★★★★
★★★★★
Parts work
Parts were delivered quickly as usual
Guest - October 28, 2019
Verified Purchase
★★★★★
★★★★★
Brad Nail Working Perfectly Again!
My Bostitch brad nailer piston and ring wore out and I ordered both. The parts arrived in 2 days and the repair was quick and easy.
Guest - November 22, 2019
Verified Purchase
★★★★★
★★★★★
Great service
Fit perfectly fast delivery
Guest - March 2, 2020
Verified Purchase
★★★★★
★★★★★
Save cash and down time!
Super easy repair. Brad nail gun works great again.
Guest - April 6, 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
★★★★★
★★★★★
product repair
Piston ring worked grea, no issues what so ever.
Guest - September 16, 2020
Verified Purchase
★★★★★
★★★★★
Nail gun repair
Arrived fast and all parts fit perfect.
Guest - September 30, 2020
Verified Purchase
★★★★★
★★★★★
Will use them again.
Correct part and fast service.
Guest - January 4, 2021
Verified Purchase
★★★★★
★★★★★
Nail gun works now
Parts fit perfectly and delivery was quick.
Guest - February 15, 2021
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
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Questions & Answers

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

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This Porter Cable narrow crown stapler misfires because the striker blade the pushes the staples in to the work piece does not retract so that the staples can move into position for next shot. What parts or adjustment do I need? Thanks
Dan For model number NS150C - November 21, 2022

Hello Dan, Thank you for the question. We suggest checking the Piston Driver Part Number: 180205-K for wear or damage. The main purpose of the 180205 Piston/Driver is to strike the fastener in the nose of the nail gun into the material you are nailing. We hope this solves your problem!

eReplacementParts Team
November 21, 2022

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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 mins 

(26 rated repairs) ?
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Piston driver broken

Hubert from Rockaway Beach, Missouri

12 of 12 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
N905972, 180451
Remove the 4 bolts from the head. The remove the piston/driver from the cylinder. Look for any broken parts or any debris in cylinder. Put the piston ring in the top groove of the piston, lightly oil the piston ring, then insert it into the cylinder. Replace the head with the for bolts, be careful not to damage the head gasket
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The driver broke off the piston

Mark from Casper, Wyoming

6 of 6 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
N905972, 180451
Remove 4 allen screws from head of nailer and remove head.Remove piston and driver from cylinder. Install new piston ring into groove at top of piston and insert into cylinder. Replace head and 4 screws. I\'m sure that there\'s a torque spec for the screws I use the good and tight method. I\'ve never had any problems with reusing the ga sket.
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Striker wouldn\'t retract all the time

Scott from KILLEEN, Texas

5 of 5 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
N905972
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.
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Piston shaft broken

Daniel from saint paul, Minnesota

4 of 4 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
N905972, 180205-K
Remove the four screw holding the cap on and removed the cap
Removed the broken driver
Cleaned the interior of the stapler and oiled it
Placed the piston ring on the new piston and installed it
Replaced the top cap of the stapler
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Driver wouldn\'t rebound/reset behind nail head. Thus, it wouldn\'t set/shoot

Colin from Virginia Beach, Virginia

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Pliers
Parts Used:
N906034, N905972, 180451, 180461, 180460, 180459, 180458
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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Nail driver piston broke off

Matt from Dassel, Minnesota

3 of 3 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Wrench set
Parts Used:
N905972, 180451
Remove 4 screws on top of nail gun, gently pull off top. That will give you access to the part to slide it out and replace.
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Driver pin was broken and trigger valve was leaking

Dwight from Puyallup, Washington

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers
Parts Used:
N906034, N905972, 9R202265-TW, MRG002514, 180447, 180451, 180448, 179760, 180461, 180458
Opened it up and replaced the parts. Simple and easy
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Driver won\'t return

John from Nisswa, Minnesota

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
N905972
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.
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Piston driver small tip becomes bent or chipped

Jerome from Sanford, Florida

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers
Parts Used:
N905972
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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Hammer broke off the Piston.

Randy from VERMILLION, South Dakota

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Parts Used:
N905972, 180205-K
1. Removed the four screws from the head.
2. Pulled head from case.
3. Remove plastic chamber.
4. Remove piston and hammer.
5. Install piston ring on new piston/hammer.
6. Reinstall piston/hammer in plastic chamber.
7. Reinstall plastic chamber and piston/hammer back into case while aligning hammer shaf t with hole in striker slot.
8. Reinstall head to case with the four screws previously removed in step one.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP18995697
Manufacturer Part Number: N905972
Brand Model Number Description
Porter Cable BN200C Nailer - Brad Nailer
Porter Cable BN200CR Nailer - Brad Nailer
Bostitch BT1855 Nailer - Oil-Free Brad Nailer
Bostitch BT1855K Nailer - 18 Gauge Brad Nailer
Bostitch BTFP12233 Nailer - Smart Point 18 GA Brad Nailer Kit
Craftsman CMPBN18K Nailer - 18ga Brad Nailer
Craftsman CMPNC18K Nailer - 18ga Nrrw Crwn Stplr
DeWALT DWEHF1838K Nailer - 18ga 7/32 Crwn Flr S
DeWALT DWFP12231 Nailer - 18 Gauge 2" Brad Nailer
DeWALT DWFP12232 Nailer - 18 Gauge 1-1/2" x 1/4" Narrow Crown Stapler
DeWALT DWFP12233 Nailer - 53445
DeWALT DWFP12233R Nailer - Pin Nailer
DeWALT DWFP1838 Nailer - 18ga 1-1/2 Stapler
DeWALT DWFP1838R Nailer - Stapler
DeWALT DWLHF2025K - 20ga Engr Floor Stap
Bostitch EHF1838K Nailer - Flooring Stapler
Bostitch LHF2025K Nailer - Flooring Stapler
Porter Cable NS150C Nailer - 18G Stapler
Bostitch SL1838BC Nailer - Cap Stapler
Bostitch SX1838 Nailer - Pneumatic Brad Nailer & Stapler
Bostitch SX1838K Nailer - Oil-Free Stapler
PISTON RING
$ 5.95
In Stock
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Stock Status
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Mail-In Recycling Rebate

Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.

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