

Please note that any Festool items that are out of stock will not be delivered to customers until January 2026. If you would like to know if an item is in stock before ordering, please contact us via email and we will get back to you ASAP during our working hours. Please note that this is a universal situation for all Festool suppliers during the holiday period.
Paslode 403992 Cylinder Head O‑Ring – OEM Replacement for IM350 & IM350CT Nailers
The Paslode 403992 O‑Ring is a genuine replacement part designed for the upper section of the cylinder head on IM350 and IM350CT nailers. This precision-sealing ring maintains airtight compression within the tool, critical for delivering consistent nail-driving power.
OEM-quality replacement (Part No. 403992), specifically for IM350 and IM350CT models
Constructed from durable rubber to resist high-pressure air and heat
Designed to seal the cylinder head, preserving internal pressure
Simple to install during scheduled maintenance or part replacement
Restores proper air compression and prevents power loss
Reduces misfires and maintains consistent firing performance
Extends tool lifespan by protecting against air leakage and internal wear
Easy, cost-effective fix to keep your nailer job-ready
Consider installing a new cylinder head O-ring when:
You notice decreased driving power or inconsistent firing
Air leaks or hissing noises occur near the cylinder head
Regular maintenance is performed during service intervals
The Paslode 403992 O‑Ring is a small but essential part for maintaining optimal performance and reliability in your IM350 or IM350CT nailer.