BA15D BAY15D Copper Lamp Holder Base | 1156 1157 Socket

BA15D & BAY15D All-Copper Lamp Holder Base

Upgrade your automotive, marine, or household lighting setup with this precision-made BA15D / BAY15D all-copper lamp holder base. Compatible with 1156 and 1157 bulb types, this versatile socket is ideal for turn signal lights, brake lights, boat cabin lamps, and a wide range of appliance lighting applications. Simple to install and built to last, it's a reliable DIY-friendly solution for hobbyists and professionals alike.

Key Features

• Premium Copper Construction: Made from high-quality all-copper material, offering outstanding electrical conductivity and corrosion resistance for long-lasting, dependable performance.
• Two Configurations Available: Available in BA15D flat-pin and BAY15D offset-pin designs — the high-low foot design of BAY15D ensures a more secure, stable bulb fit, improving safety and ease of use.
• Broad Compatibility: Works with 1156 and 1157 bulb formats. Suitable for car lights, boat lights, household appliance fixtures, and more.
• Quick & Easy Installation: Straightforward design means you simply align and insert the bulb — no special tools required. Saves time and effort on every installation.
• Stable Supply & Consistent Quality: Manufactured through a mature production process, making it an ideal choice for both single-piece DIY projects and bulk purchases.

Specifications

Package Contents

• 1 × BA15D or BAY15D Lamp Holder Base

Please Note

• Photos are for illustration only; please refer to the written specifications for exact sizing.
• Minor measurement differences may occur due to manual measurement.
• Colors may vary slightly depending on your monitor's display settings.

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What is the difference between the BA15D and BAY15D lamp holder bases?

A: The BA15D lamp holder features a flat-pin (same-height) bayonet design, while the BAY15D features an offset high-low pin design. The BAY15D's offset pins ensure the bulb can only be inserted in one correct orientation, providing a more secure and stable connection — commonly used for dual-function bulbs like brake/tail lights (1157 type).

Q: What bulb types are compatible with this lamp holder?

A: This lamp holder base is compatible with standard 1156 (single-contact BA15D) and 1157 (dual-contact BAY15D) bayonet-type bulbs, making it suitable for automotive turn signals, brake lights, marine boat lamps, and various household appliance fixtures.

Q: Is this lamp holder suitable for DIY marine or boat lighting projects?

A: Yes! The all-copper construction offers excellent corrosion resistance, making this BA15D/BAY15D lamp holder a great choice for boat and ship lighting DIY projects where moisture resistance and electrical reliability are important.

Q: How do I install this lamp holder base?

A: Installation is straightforward — simply align the pins of your compatible bulb with the socket, press in, and twist to lock. No special tools are needed, making it an ideal option for both beginners and experienced DIYers.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.