This replacement end cap is a high quality item that is manufactured for use with Bostitch nailers and staplers. It is the end cap to which the hose are connected. This tool uses a 1/4" N.P.T. male plug. This cap is made from durable metal and it is sold individually.
This item is a genuine OEM replacement part by Bostitch. It is a part of the trigger valve assembly. These parts may need replacement if air is leaking through the trigger. An O-ring is a bendable piece that acts as a seal between rigid parts, designed to retain pressure. This piece is sold individually. Also sold with Trigger Valve Kit, part # TVA5.