The HH Smith (Abbatron) 1516‑103 is a dual stackable banana‑plug adapter designed for electrical testing setups. Here's what it does and how it’s typically used:

⚙️ Key Features

• Dual Banana Plugs (Internally Shorted)
  It connects both conductors together (shorted internally), which allows grounding or shorting of an input/output pair simultaneously. Useful for test equipment setups or safety grounding

• Stackable Design
  Rear banana-jack holes let you plug in additional banana plugs—stacking increases current capacity (up to ~15 A) or links multiple devices

• Industry‑Standard Spacing & Rating
  Fits standard dual binding posts on ¾" centers. Rated around 15 A continuous, 5 kV, low capacitance (~1 pF), and low resistance (<1 milliohm) 

• Rugged Build
  Black molded butyrate or ABS body with nickel‑plated beryllium‑copper contacts for reliable conductivity and durability 

🔧 Common Applications

1. Shorting Outputs or Inputs
   Connects and holds two banana terminals together—commonly used to safely discharge or short test leads.

2. Grounding or Loop Connections
   For test setups requiring both conductors to be grounded or joined.

3. Custom High‑Current Bus Setup
   Stack multiple 1516‑103 units to create a higher‑current bus or bridge between banana post pairs.

🧷 Summary Specs

📝 Example Use Case

Suppose you're testing a dual-rail supply and want to temporarily disable both rails together. Plugging in a 1516‑103 across the outputs shorts the rails, creating a safe and controlled discharge path.

Bottom line: The HH Smith 1516‑103 is a handy, stackable, internally shorted banana‑plug adapter. Ideal for grounding, shorting, or bus-bridging tasks in electronics labs and field testing. New open box stock, may have some dust and wear from our bins. Some may be bulk stock and some may be bagged - our choice of what is sent.