BULB 1816

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BULB 1816 (521816) consists of a light-emitting filament, a stem that retains the filament, and a metal base that screws into a socket, such as one found in a lamp or ceiling fixture. As one of the most successful inventions, the parts work together. The light bulb's base has three primary functions. It secures the light bulb within an electrical source unit like a lamp or a light fixture starter. The base's second function is to carry electricity from the electrical source to the light bulb's inside. The last role is to seal the globe and all components inside the bulb.

Key Features:

  • It uses a heavy-duty glass envelope for break resistance.
  • Nickel-plated brass bases are corrosion-resistant and provide a positive point of contact.
  • Filaments with a "tough service" design allow for hours of consistent burning.
  • The bulb allows broken ice to glide down the hull with its moist side touching the hull during ice navigation. The ship's overall drag is reduced because the wet side of the ice has a lower friction coefficient.


  • SKU: 1-521816
  • UPC: 091887804614
  • Weight: 0.02 LBS
  • Life: 1000
  • CP: 3
  • Figure Letter: I
  • Qty _ Pkg: 2
  • Volts: 12
  • Design Watts: 4.3
  • Design Amps: 0.33
  • Design Volts: 13
  • Trade No.: 1816
  • Manufacturer Part Number (MPN): 521816

Heavy duty glass envelope for break resistance. Nickel-plated brass bases prevent corrosion while insuring a positive point-of-contact. Filaments, with “rough service" design, permit hours of reliable burning. Tested for dependability. Base Letter Details - E. Wedge Base F. Wedge Base G. Miniature Bayonet Base H. Miniature Bayonet Base I. Miniature Bayonet Base J. Miniature Bayonet Base K. Double Contact Bayonet Base L. Double Contact Bayonet Base M. Double Contact Bayonet Base O. Single Contact Bayonet Base P. Single Contact Bayonet Base Q. Single Contact Bayonet Base R. Single Contact Bayonet Base S. Double Contact Index Base

This product replaces:

    639-521816, 9188780461, 91887804614, 1816

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ProPride 3P Hitch, Hassle Free, 60-Day No Risk Guarantee

You can return the 3P Hitch at any time during the first 60 days of use for a complete refund. That's a 100% risk free guarantee. 60 days begins when you receive the product unless otherwise arranged for a later date. We must receive the product in Holly, MI in 60 days or less. To initiate a return you can contact us for a return merchandise authorization. If the hitch was purchased during a FREE shipping promotion, $299 will be deducted for any returned hitches.


We can ship to virtually any address in the Continental US. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.)

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

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