This is a Genuine Manufacturer Approved replacement part used on specific Bostitch Nailers. This is a Rubber Ring and it is sold individually. O-rings are designed to withstand thousands of pounds of pressure by creating a seal between two or more parts. Over time O-Rings will damage and should be inspected periodically. If parts are showing signs of wear they should be replaced.

This is a genuine Bostitch replacement part, it is sold individually.
The purpose of the N12112 is to secure the Canister Assembly to the Canister Cover Assembly, with the use of the Cover Canister Pin.
It is a good idea to check the condition of the Hinge Pin Retainer, as they do have a tendency to deteriorate over time.

This is an authentic Bostitch replacement part used on specific Nailers. This is a Rubber Ring and it is sold individually. O-rings are designed to withstand thousands of pounds of pressure by creating a seal between two or more parts.

This is a Genuine Manufacturer Sourced replacement part designed for Nailers/Staplers. This O-Ring provides an Air-Tight Seal for the Driver Unit. Over time this O-Ring will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of Rubber and it is Sold Individually.

Replacing this item you would need Hex Key/Allen Wrench and Pliers to replace this item.

This is a Genuine Manufacturer Approved replacement part used on specific Bostitch Nailers. This is a Rubber Ring and it is sold individually. O-rings are designed to withstand thousands of pounds of pressure by creating a seal between two or more parts. Over time O-Rings will damage and should be inspected periodically. If parts are showing signs of wear they should be replaced.

Genuine Bostitch replacement part, this part is sold individually.
The purpose of this O-Ring is to create a seal around the Piston Stem of the Bostitch Floor Nail Guns shown below.
Over time O-Rings can wear and become brittle or stretched.
When your Nail Gun becomes sluggish or the Driver won't retract, it may be time to tear the Gun down and inspect all of the O-Rings and Seals.