18986869-1-M-DeWALT-851606-S-O-RING, 1.850X.210
Part Location Diagram of 851606-S DeWALT O-RING, 1.850X.210
See part 16 in the diagram
( Grid squares measure 1x1 inch )
18986869-1-S-DeWALT-851606-S-O-RING, 1.850X.210 18986869-2-S-DeWALT-851606-S-O-RING, 1.850X.210 18986869-3-S-DeWALT-851606-S-O-RING, 1.850X.210 Part Location Diagram of 851606-S DeWALT O-RING, 1.850X.210

O-RING, 1.850X.210 851606-S

Works With Model CMP21PL!
$10.50
On Order
Fix Number:
FIX18986869
Manufacturer #:
851606-S
Manufactured by:
DeWALT
Works With Model CMP21PL!

Jump to:

Product Description

This piston O-ring creates a tight seal between the piston and cylinder, allowing proper air pressure to build for strong and consistent fastening performance. Made from durable rubber, it is designed to withstand repeated use while maintaining reliability. Replacing a worn or damaged O-ring can restore driving power and help prevent air leaks, ensuring your tool operates effectively.

  • Works with the following brands:
    Bostitch, Porter Cable, Black and Decker, Craftsman
  • Works with the following products:
    Nailer
  • Part# 851606-S replaces these:
    851606-S, P851606-S
Works with the following brands:
Bostitch, Porter Cable, Black and Decker, Craftsman
Works with the following products
Nailer
Part Number Cross Reference
Part# 851606-S replaces these:
851606-S, P851606-S

Questions and Answers

Be the first to ask our experts a question about this part!

BUMPER, DRIVE
$14.68
In Stock
Part Number: FIX18979614
This is a genuine manufacturer sourced replacement part designed for use with Bostitch staplers. The purpose of this piston bumper is to keep the piston from hitting the bottom of the cylinder and damaging it. Because th...
SEAL
★★★★★
★★★★★
(1)
$13.35
In Stock
Part Number: FIX18979613
A genuine item which is supplied directly from the original equipment manufacturer for use with Bostitch nailers. It is a high-quality component which helps to provide an air-tight seal for the cylinder sleeve, over time...
HEAD VALVE SEAL
$6.51
In Stock
Part Number: FIX18990150
This is an OEM part sourced directly from the manufacturer. The head valve seal is found in a Porter Cable framing nailer. This part is made of plastic, and is placed in the head valve to help control the flow of air i...
Trigger Valve
$12.35
In Stock
Part Number: FIX18990335
This genuine OEM trigger valve in your nailer or stapler works in conjunction with the head valve. When you press the trigger valve, it creates a pressure difference between the air reservoir and the cylinder and causes ...
SEAL, CHECK
$6.51
In Stock
Part Number: FIX18980194
The check seal fits between the o-ring and the cylinder sleeve ring. This is a genuine replacement part sourced from the original manufacturer for use with Bostitch nailers and is available as an individual replacement. ...
O-RING, 2.550X.103
$6.51
On Order
Part Number: FIX18987825
This o-ring is used to provide an air tight seal for the cylinder. It is an authentic OEM sourced replacement item that is specially produced for use with framing nailers. It is made from high quality rubber material and...
O-RING, 3.484X.139
$6.51
In Stock
Part Number: FIX18979657
This replacement o-ring is an authentic manufacturer sourced replacement part that is utilized with Bostitch nailers. It helps to provide an air tight seal between the piston and the cylinder walls. It is made from high ...
SEAL
$6.51
In Stock
Part Number: FIX18979647
This is a genuine replacement part for Bostitch stick nailers. The frame seal is used to be placed in between the frame parts to create a tight seal to prevent any objects or debris from getting in the tool. The seal is ...
ASSEMBLY, PISTON/DRIV
$73.09
In Stock
Part Number: FIX18980027
RING, CYLINDER SLEEVE
$6.51
In Stock
Part Number: FIX18980040
It is a genuine item that is supplied by the original equipment manufacturer for use with Bostitch nailers. The purpose of this ring is to provide a tight seal for the cylinder sleeve, unfortunately, over time it will we...
Affresh Dishwasher Cleaner Tablets - 6
$22.91
In Stock
Part Number: FIX12345667
Affresh dishwasher Cleaner is specially formulated to help remove limescale and mineral build-up that can be unsightly and could affect your dishwasher's performance. Each tablet is designed to clean inside your machine ...
Affresh Washing Machine Cleaner - 3 pack
$20.71
Special Order
Part Number: FIX1960673
This washing machine cleaner includes three time-release tablets designed to remove odor-causing residues, grime, and buildup from high-efficiency and top-load washing machines. The tablets work by cleaning the tub, pump...
Produce Preserver Filter
$18.54
In Stock
Part Number: FIX3503014
Fresh Flow Produce Preserver is made for your refrigerator to help keep produce fresh for longer by absorbing the chemical, ethylene, that causes your fruits and vegetables to ripen quicker. Your produce could be fresh f...
Affresh Washing Machine Cleaner Tablets – 6 Count
$28.91
In Stock
Part Number: FIX12345661
This Affresh Washing Machine Cleaner deep cleans to help remove the odor-causing residues and grime that daily loads leave behind. The time-release tablets are EPA Safer Choice certified, septic-safe and designed to clea...
Refrigerator Deodorizer
$32.12
In Stock
Part Number: FIX12739141
Refrigerator deodorizers help to reduce bacteria growth and therefore reduce smells and extend the life of food.
Affresh Ice Machine Cleaner
$27.83
In Stock
Part Number: FIX12583750
This nickel-safe, unscented ice machine cleaner measures 16 fluid ounces and is used to remove mineral build-up and hard water and is compatible with several makes and models of freestanding ice machines. To use properly...
O-RING, 3.484X.139
$6.51
In Stock
Part Number: FIX18979657
This replacement o-ring is an authentic manufacturer sourced replacement part that is utilized with Bostitch nailers. It helps to provide an air tight seal between the piston and the cylinder walls. It is made from high ...
SEAL
$6.51
In Stock
Part Number: FIX18979647
This is a genuine replacement part for Bostitch stick nailers. The frame seal is used to be placed in between the frame parts to create a tight seal to prevent any objects or debris from getting in the tool. The seal is ...
ASSEMBLY, PISTON/DRIV
$73.09
In Stock
Part Number: FIX18980027
RING, CYLINDER SLEEVE
$6.51
In Stock
Part Number: FIX18980040
It is a genuine item that is supplied by the original equipment manufacturer for use with Bostitch nailers. The purpose of this ring is to provide a tight seal for the cylinder sleeve, unfortunately, over time it will we...
Affresh Dishwasher Cleaner Tablets - 6
$22.91
In Stock
Part Number: FIX12345667
Affresh dishwasher Cleaner is specially formulated to help remove limescale and mineral build-up that can be unsightly and could affect your dishwasher's performance. Each tablet is designed to clean inside your machine ...
Affresh Washing Machine Cleaner - 3 pack
$20.71
Special Order
Part Number: FIX1960673
This washing machine cleaner includes three time-release tablets designed to remove odor-causing residues, grime, and buildup from high-efficiency and top-load washing machines. The tablets work by cleaning the tub, pump...
Produce Preserver Filter
$18.54
In Stock
Part Number: FIX3503014
Fresh Flow Produce Preserver is made for your refrigerator to help keep produce fresh for longer by absorbing the chemical, ethylene, that causes your fruits and vegetables to ripen quicker. Your produce could be fresh f...
Affresh Washing Machine Cleaner Tablets – 6 Count
$28.91
In Stock
Part Number: FIX12345661
This Affresh Washing Machine Cleaner deep cleans to help remove the odor-causing residues and grime that daily loads leave behind. The time-release tablets are EPA Safer Choice certified, septic-safe and designed to clea...
Refrigerator Deodorizer
$32.12
In Stock
Part Number: FIX12739141
Refrigerator deodorizers help to reduce bacteria growth and therefore reduce smells and extend the life of food.
Affresh Ice Machine Cleaner
$27.83
In Stock
Part Number: FIX12583750
This nickel-safe, unscented ice machine cleaner measures 16 fluid ounces and is used to remove mineral build-up and hard water and is compatible with several makes and models of freestanding ice machines. To use properly...
View Less

Model Compatibility

This part works with the following models:
Fix Number: FIX18986869
Manufacturer Part Number: 851606-S
Brand Model Number Description
Bostitch BFN21PL Nailer - Shell 21pl Bostictch Bull
Craftsman CMP21PL Nailer - 21* Plstc Frmng Nler
Bostitch F21PL Nailer - Pneumatic Stick Nailer
Bostitch F21PL2 Nailer - Pneumatic Stick Nailer
Bostitch F28WW Nailer - Pneumatic Stick Nailer
Bostitch F33PT Nailer - Pneumatic Stick Nailer
Bostitch F33PTSM Nailer - Stick Nailer
Black and Decker FC350B Nailer - 3-1/2 Framing Nailer
Porter Cable FR350B Nailer - 3-1/2" Framing Nailer
Porter Cable FR350BR Nailer - Full Round Head Framing Nailer
Bostitch N86C Nailer - Coil-Fed Pneumatic Nailer
Bostitch N88RH Nailer - Pneumatic Stick Nailer
Bostitch N88RH-2MCN Nailer - Pneumatic Stick Nailer
Bostitch N88RH17-2 Nailer - Pneumatic Stick Nailer
Bostitch N88WW Nailer - Pneumatic Stick Nailer
Bostitch N88WWB Nailer - Pneumatic Stick Nailer
Bostitch N89C Nailer - Framing Nailer
Bostitch N89C-1 Nailer - Coil Framing Nailr
Bostitch N89C-1P Nailer - Heavy Duty Pallet, Fence Nailer
Bostitch N89C-HQ Nailer - Framing Nailer
Bostitch N89RH17 Nailer - Pneumatic Stick Nailer
Bostitch N89RH17-1 Nailer - Nailer
Bostitch N89RH17-2MCN Nailer - Pneumatic Stick Nailer
Bostitch N95162 Nailer - Pneumatic Stick Nailer
O-RING, 1.850X.210
$ 10.50
  On Order
Stock Status
 In Stock

Item is in stock and will ship today if your order is placed before 4:00 PM Eastern Standard Time.

If your order is placed after 4:00 PM EST, the in stock items will ship on the next business day.

 On Order

Item is not in stock and usually ships 3-5 business days from the time you place your order.

 Special Order

Item is not in stock and usually ships 10-15 business days from the time you place your order.

 NLA - No Longer Available

This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.