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Condition:
Factory New
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Learn more:
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MFR:
RPI
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- MPN: RPO356
- Phone: (800) 221-9723
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Frequently asked questions
Is this O-Ring built from high-quality, durable material?
Yes, this component is constructed from premium Nitrile (Buna N) rubber. It features a 70 durometer hardness rating, which is specifically engineered to provide a reliable, resilient seal for demanding autoclave and sterilizer environments.
Will this part fit my Ritter-Castle 999 Series unit?
Absolutely. This O-Ring (RPI Part #RPO356) is specifically designed as a replacement part for the Fill Tube application within the Ritter - Castle 999 Series Autoclaves and Sterilizers, ensuring a precise and secure fit.
How many O-Rings are included in each package?
Each order you place comes with a convenient package containing 12 individual O-Rings, making it an excellent choice for facility maintenance inventory and routine repair needs.
Does this part match the exact specifications of the original?
Yes, this is a factory-new, precision-engineered component that adheres to exact industry standards. It carries the Industry Part #AS568-111 and is a direct cross-reference for OEM Part #11611, ensuring seamless compatibility with your equipment.
Can you confirm the precise dimensions of this O-Ring?
The RPO356 O-Ring is manufactured to exact imperial dimensions to ensure a proper seal:
- Inner Diameter (ID): 0.424 in
- Outer Diameter (OD): 0.630 in
- Cross Section (C/S): 0.103 in
Is this a genuine, factory-new replacement component?
Yes, this product is guaranteed Factory New. It is manufactured by RPI to strict medical equipment standards, ensuring you receive a reliable, high-performance part for your sterilization equipment.
Where is the best place to use this O-Ring?
This O-Ring is specifically intended for the Fill Tube mechanism of compatible Ritter - Castle autoclaves. Its design helps maintain the necessary fluid-tight seal required for safe and effective sterilization cycles.
Is this part easy to cross-reference with older RPI parts?
Yes, this component is easily identifiable for existing users. It is the current RPI Part #RPO356 and serves as the direct replacement for the old RPI Part #RCO037, so you can verify your records with confidence.
What makes this Nitrile material ideal for autoclaves?
Nitrile (Buna N) is an industry-standard elastomer known for its excellent resistance to oil, water, and heat. Combined with a 70-durometer rating, it provides the perfect balance of flexibility and firmness required to sustain a tight seal under the pressure conditions found in sterilization equipment.
Is this part currently in production?
Yes, this part is active and currently available. It is not discontinued, making it a reliable, long-term solution for maintaining your Ritter - Castle 999 Series equipment.

RPI RPO356 Industry Part #As568-111