Delrin® / Acetal Plastic Washers
Delrin® (Acetal, POM) is DuPont's polyoxymethylene engineering plastic — stiff, dimensionally stable, low-moisture-absorption, and easily machined. Cannon Gasket die-cuts and CNC machines custom Delrin washers for precision mechanical assemblies, fluid handling, gear and pulley spacers, and any application that needs nylon-like toughness with tighter dimensional control.
- Highlight
- Excellent dimensional stability
Request a quote for Delrin® / Acetal plastic washers.
Properties of Delrin® / Acetal plastic washers
Cannon Gasket cuts Delrin® / Acetal plastic washers to your drawing. Good resistance to organic solvents, fuels, and moisture. Not recommended for strong acids, strong bases, or oxidizers.
Delrin® / Acetal tolerances and customization
Standard dimensional tolerances on Delrin® / Acetal plastic washers land around ±0.010" to ±0.015" on OD and ID, depending on material thickness and profile. Tighter tolerances are available on selected grades. Cannon Gasket cuts Delrin® / Acetal to custom profiles in-house and matches lead times to your production volume. PSA backing, pad printing, custom packaging, and kitting are all on the menu when you need them.
How Delrin Performs
- Service temperature -40°F to +185°F. - High stiffness and tensile strength. - Very low moisture absorption — stable dimensions in humid environments. - Low coefficient of friction and excellent wear resistance. - Good resistance to fuels, oils, and solvents (not strong acids or bases).
Common Washer Applications
Precision gear and pulley spacers, fluid-handling component washers, bearing isolators, automotive interior trim, medical device assemblies, electronics housings, and applications needing nylon-like toughness with tighter dimensional control than nylon delivers.
When to Choose Another Material
For chemical contact with acids or bases, PTFE. For higher temperature, PEEK. For lower cost when toughness matters more than dimensional stability, Nylon.
Manufacturing Methods
Die-cut and compound-die-cut for thin gauges. CNC-machined to ±.0005 for thicker parts and complex geometries — Delrin is one of the best plastics for machining.
Manufacturing, finishing & stocking
Precision & tooling: Capable of holding tolerances as tight as ±.001" on critical dimensions when required, beyond the ±0.010" to ±0.015" standard. Short- and long-run capabilities, with an extensive in-house tooling inventory for rapid turnaround.
Clean room: Cannon Gasket offers clean-environment stamping for medical, FDA, electronic, and scientific applications where a controlled level of particulate is required, with capabilities to meet ISO Class 10,000.
Stocking agreements: Blanket orders, VMI (vendor-managed inventory), JIT (just-in-time), and Kanban replenishment programs.
Pad printing: Pad print your part number, identification marking, or company name in a range of ink colors. Marking per customer specifications or MIL-STD-130.
Packaging: Parts are bagged and tagged in specified quantities and labeled with P/N or any required information. Capability to meet specific packaging and labeling requirements.