Blue Sea Systems Rotating Single Entry Cable Cap, Small Pair, For Integral Wing Nut Posts, 360 Degree Rotating Top
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Overview
The Blue Sea Systems 4001 is a rotating single-entry cable cap pair for insulating battery terminals with integral marine wing nut posts. The top rotates 360 degrees so the cable can enter from the angle that works best in a tight battery compartment, and the pair includes one red cap and one black cap for quick polarity identification.
The caps are molded in PVC and suit installations where the battery cable does not leave the terminal in a straight line. On boats with limited clearance around the battery, that extra freedom can make routing cleaner and help keep the terminal area covered once the connection is made.
Key features
- Fits batteries with integral marine wing nut posts
- Rotating top allows 360 degree cable entry from any angle
- Red and black pair makes positive and negative terminals easy to identify
- PVC construction for terminal insulation
- Single-entry cap design keeps the cable exit controlled at the battery post
Compatibility and fit
This model is intended for batteries that use integral marine wing nut posts. It is a practical match when you need to cover the terminal and still bring the cable in from the side that clears the battery box, tie-down, or nearby wiring.
The small pair format works well in compact battery spaces where post protection matters and cable direction cannot be forced into one fixed path. It suits owners who want a cleaner battery connection without changing the existing post style.
Installation and use
On board, this is useful where the cable changes direction as soon as the lug lands on the post. The rotating top lets you line up the opening after the connection is made, which helps reduce strain at the terminal and avoids a hard turn right at the battery.
It is a good fit for starting or house battery installations on smaller boats, service compartments, and other spaces where access is tight and the battery terminals need basic insulation.
What’s included
- One red cable cap
- One black cable cap
Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.
Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.
Delivery and tracking
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Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.
Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.
Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.
To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.
We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.