ONAN 405-5787 FIBERGLASS BLOCK - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
- ONAN 405-5787
- MPN:
- 405-5787
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock


Available Inventory
Get what you need quickly with our wide stock and fast shipping.
Competitive Pricing
Enjoy competitive rates and great deals on every order.
Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Authentic ONAN replacement part engineered for perfect compatibility
- Provides structural support and insulation to optimize engine performance
- Reduces vibration impact, contributing to quieter and smoother generator operation
- Ensure system efficiency and safety with genuine Cummins/Onan components
ONAN 405-5787 FIBERGLASS BLOCK - Power your equipment with trusted ONAN excellence and uncompromising resilience
The ONAN 405-5787 Fiberglass Block is a critical component crafted to maintain the integrity and reliability of your power generation system. Its robust construction supports engine components while minimizing wear caused by vibration and heat. Designed to meet strict OEM standards, this part ensures continued safe and efficient operation under demanding conditions. Secure your system's performance today by adding this genuine part to your cart—where trusted engineering meets lasting power.
Unique strength and performance crafted for your peace of mind
- Guaranteed genuine ONAN quality for exact fit and durability
- Enhances engine longevity by stabilizing mechanical stresses
- Contributes to noise reduction and operational smoothness
- Supports optimal fuel economy by maintaining system balance
- Warranty-compliant component to protect your investment
Details
Category: Blocks
Product SKU: ONAN 405-5787
We pride ourselves on providing expert guidance to help you make the right replacement choices. Our dedicated team is ready to assist through our help center to ensure your buying experience is smooth and informed. We are passionate about helping you achieve the best possible repair outcomes, securing the dependable operation your equipment deserves.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov