Square D 9999R21 Electrical Interlock/ Box of 2

Ensure the secure operation of your electrical systems with the Square D 9999R21 Electrical Interlock. Designed to provide essential interlocking functions, this component helps prevent simultaneous or unauthorized operation of critical equipment, enhancing the safety and reliability of your control panels. Supplied in a box of 2, it's ideal for both new installations and maintenance projects.

Key Features:

• Enhanced Safety: The 9999R21 electrical interlock provides crucial safety features by preventing the operation of incompatible devices or circuits, reducing the risk of electrical faults and accidents.

• Robust Construction: Built from high-quality materials to endure the rigors of industrial environments, offering durability and long-lasting performance.

• Reliable Operation: Ensures dependable interlocking functionality, contributing to the overall safety and efficiency of your electrical systems.

• Versatile Use: Suitable for a range of Square D control panels and equipment, making it a flexible choice for various applications.

• Convenient Packaging: Supplied in a box of 2, which is ideal for bulk purchases, multiple installations, or keeping spares on hand, minimizing the need for frequent reordering.

• Easy Integration: Designed for straightforward installation into compatible systems, allowing for quick setup and efficient operation.

We ship orders Monday through Friday, excluding holidays. Most in-stock items are processed and shipped within 1–2 business days. Once your order ships, you’ll receive tracking information via email.

Standard Shipping: 2–5 business days (carrier: USPS, UPS, or FedEx depending on item size and destination)

Expedited Shipping: Available upon request. Contact us before ordering.

Freight Shipping: Larger or palletized orders may ship via LTL freight. We’ll contact you directly for delivery coordination.

Shipping Rates:
Shipping costs are calculated at checkout based on weight, dimensions, and destination. For bulk orders or local pickups, please contact us for custom shipping options.

New Products are covered by a 90 Day Warranty. Used Products are sold as is.

   Returns are accepted within 30 days of delivery.
    •    Items (new or used) must be in the same condition as received and include original packaging when possible.
    •    A receipt or proof of purchase is required.
    •    Buyer is responsible for return shipping unless the item is defective or not as described.

 A 20% restocking fee applies to all returns not due to defects or listing errors (e.g., ordered by mistake, no longer needed).
    •    This fee will be deducted from the refund total.