Part Location Diagram of 391814-00 DeWALT Grommet
See part 40 in the diagram
Replacing your DeWALT Nailer Grommet
( Grid squares measure 1x1 inch )

Grommet 391814-00

Manufactured by:
DeWALT
ERP Number:
ERP10171452
Part Number:
391814-00
Original Equipment Manufacturer ?
  Works with your model  D51256!
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(15 rated repairs) ?
  Works with your model   D51256!

Product Description

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This special grommet is an original part which is specially designed for use with DeWALT and Porter Cable staplers and nailers. It is utilized to secure the pin that holds the adjuster. This is a high-quality replacement for a damaged or a missing grommet that was installed on a new unit. To ensure the correct location and application of this part, refer to the appropriate diagrams of your model. It is made of durable rubber and is sold individually. You may need pliers to remove and secure the grommet with the pin.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • DeWALT
  • Bostitch
  • Porter Cable
  • Craftsman
This part works with the following products:
  • Nailer
Part# 391814-00 replaces these:
391814-00, P391814-00,

Videos For installing this part.

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Replacing your Grommet

Customer Part Reviews

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Average Rating (out of 5):
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(13 Reviews)
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Questions & Answers

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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 

(15 rated repairs) ?
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Sorry, we couldn't find any existing installation instruction that matched.

Air nail gun stopped working. Leaked air at trigger.

Jack from Morristown, Tennessee

15 of 15 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Parts Used:
647620-00, 391814-00
1. Drove out roll pins.
2. Removed trigger and valve.
3. Installed new valve and reinstalled trigger.
4. Replaced pins.

Note: the excellent troubleshooting on the Web site let me buy only parts I needed instead of a full rebuild kit.
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Wouldn\'t fire just a slight pop of air from trigger.

Paul from Texarkana, Texas

11 of 11 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Parts Used:
647620-00, 634174-00, 391814-00
Punch the trigger pin using small punch through grommet this will save grommet for reuse.
Remove trigger and punch the two pins for the trigger assembly out from either side the the shorter pin is on the bottom.
Remove trigger assembly by applying light air to hose fitting and the assembly will pop out quickly. Use a hook to pull out remaining housing of assembly that will be left behind. Hook air hose to gun to remove any trash inside gun housing then remove air hose and clean trigger assembly housing with a QTip to remove excess oil or trash. Lubricate trigger assembly O Rings with gun oil or Vaseline and press assembly in with fingers until seated. Install the two roll pins using the punch with short pin on bottom long pin on top. Finally install the trigger back into place using the punch to help line up for the pin to be inserted correctly on the first or second try. Slip the tiny grommet onto pin on the round grooved side of pin hole. Lightly oil gun and works like new again. This took maybe 20 minutes at most from getting the tools to putting them back up. 28$ worth of parts saved from spending 160$ on a new nail gun.
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No fire when trigger pulled

Curtis from Slidell, Louisiana

5 of 5 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
647620-00, 391814-00
Ordered a trigger valve after reading reviews of similar complaints. Swapped the trigger valve out in a few minutes with a small pin punch. Worked perfect. Great website for the do it yourself or professional person.
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Air blowing by trigger

Louis from Conroe, Texas

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Parts Used:
N566148, 391814-00
I tapped out the 2 roll pins with the hammer and a long shank punch, I think it might have been a 1/8 or just a tad bit smaller, used the dental pick to pry the grommet off the trigger pivot pin. Removed the pivot pin and the trigger then pulled out one part of the trigger valve, it had separated and part of it was still down inside. I us ed the pick to remove it, all the pieces came out pretty easy. Placed the new trigger valve in, started to insert the roll pins but the valve assembly wasn\'t seated far enough, it kind of snapped into place when I applied a little more pressure. Replaced the roll pins and the trigger pivot pin, this was a little tricky at first, then I realized I needed to depress the trigger plunger to get the thin wire safety spring back into place, popped on the grommet and it was done.
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Bad orings

Chris from Anadarko, Oklahoma

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Wrench (Adjustable)
Remove nail magazine remove end housings remove trigger assy remove internal parts and lay out in order of removal clean all parts install new o-rings and reassemble in reverse order
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Trigger leaking air

Duane from Fort Myers, Florida

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Pliers
Parts Used:
647620-00, 391814-00
Removed pins with hammer. Removed old trigger. Installed new trigger. Replaced pins and grommet.
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Nailgun would not fire, air leaked

Anthony from Leland, North Carolina

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Pliers, Screw drivers
1. Printed schematic to show parts orientation and location
2.Used punch to remove trigger pin and 2 spring pins holding valve in place.
3. Old trigger came right out, but had to use needle nose pliers to pull out valve. Came out in 2 parts, inner valve spring also popped out to my surprise.
4. Fitting new in took a fe w tries, schematic helped to show orientation.
5. Back together no problem.
6. To do O rings, opened back of gun and plunger came right out. O ring change there just off-on.
7. Used 2x4 as stop to bang gun body hard to release inner workings.
8. First O ring was easy to access and find on schematic, but ring was VERY gummy, more gum than solid, scrapped off and easy replacement. But what grease to use??? None included with 2 O rings purchased, recommended grease listed for $63 for 3 oz.!!??!! Use silicone instead, but could not find any assistance on this!!!
9 Second O ring much harder to access. Had to remove spring and retainer, spring stop and slide back part. This O ring also all gum and noted 3rd O ring also gum. Had to order 3rd and now waiting for delivery. Job not done, but did reassemble, just not tighten screws.
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Trigger was leaking air when firing!

DANIEL from WAXAHACHIE, Texas

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Parts Used:
647620-00, 391814-00
Removed pins from trigger. Then used compressor to push out old damaged trigger assembly. Oiled o-rings placed new trigger back on to the gun along with pins. Gun started working again! Better than buying a New finish gun.
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trigger fell out

Shaun from Forked River, New Jersey

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
positioned trigger and pined in
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Nomar pad was gone and the heat in Florida rotted the grommets. One if the pins then fell out.

Brian from Jacksonville, Florida

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Replaced the Nomar pad. Put the new pin in and then replaced the grommets.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP10171452
Manufacturer Part Number: 391814-00
Brand Model Number Description
Bostitch BCF28WWB Nailer - Crdls 28ww Fram Nail
Bostitch BCF28WWM1 Nailer - Crdls 28ww Fram Nail
Bostitch BCF30PTB Nailer - Crdls 30pt Fram Nail
Bostitch BCF30PTM1 Nailer - Crdls 30pt Fram Nail
Bostitch BCN650D1 Nailer - 20v 15ga Ang Finish Nailer
Bostitch BCN662D1 Nailer - 20v 16ga Str Finish Nailer
Bostitch BCN680D1 Nailer - 20v 18ga Brad Nail
Bostitch BTFP12233 Nailer - 18ga Brad Nailer Kit 2-1/
Bostitch BTFP71917 Nailer - 16g Fin Nailer
Craftsman CMCN621PLB Nailer - Cordless Nailer
Craftsman CMPFN16K Nailer - 16ga Strght Fnsh Nlr
DeWALT D51236 Nailer - Nailer
DeWALT D51236K Nailer - 18 Ga 1 1/4" Brad Nailer
DeWALT D51238 Nailer - Brad Nailer Kit
DeWALT D51238K Nailer - 2" 18 Ga Brad Nailer
DeWALT D51256 Nailer - Finish Nailer Kit
DeWALT D51256K Nailer - 53444
DeWALT D51257 Nailer - 16 Gauge Finish Nailer
DeWALT D51257K Nailer - 16 GA Finish Nailer
DeWALT D51275 Nailer - Nailer
DeWALT D51275K Nailer - 53441
DeWALT D51276 Nailer - 15 Gauge Finish Nailer
DeWALT D51276K Nailer - 15 Gauge 1" to 2-1/2" Finish Nailer
DeWALT D51321 Nailer - Coil Roofing Nailer
DeWALT D51420 Nailer - Stapler
DeWALT D51420K Nailer - 18 Gauge 1" X 1/4" Narrow Crown Stapler
DeWALT D51422 Nailer - Stapler
DeWALT D51422K Nailer - 18 Gauge 1-1/2" x 1/4" Narrow Crown Stapler
DeWALT D51430 Nailer - Stapler
DeWALT D51431 Nailer - Stapler