Opti-Seal Crystal Clear Heat Shrink Sealed Crimp Step-Down Butt Connectors, NSPA SES OS56-20 OS56-16

  • $4.50

This listing is for new Opti-Seal Crimp Step-Down Wire Connectors.  These are heat shrink Sealed Electrical System (Stamped SES) Tapered connectors and are RoHS compliant.  Made in the USA.  There simply is no better product made. 

"Do It Once. Do It Right." 

Color : Crystal Clear with wire size strip marker

Wire Size : See Range for each item below (Part #)

Product Name : Opti-Seal, Heat Shrink Crimp Step Down Connectors

Type : Window with Wire Stop, Crimp and Seal with Adhesive-Lined Heat Shrink Tubing

Seam Type : Seamless

Part # : 
OS56-20 (White / Red; 24-22 AWG to 22-18AWG)
OS56-16 (Red / Blue; 2-18 AWG to 16-14 AWG)


  1. Strip both wires, wire length 5/16" (8mm)
  2. Insert wire into barrel 
  3. Crimp wire to barrel 
  4. Heat tubing 

For best results: Use heat device of at least 1000°F/538°C. Don’t overheat tubing. Don’t isolate flame. Distribute heat evenly over tubing. 

NOTE : Crimping tool and Heat Source to reduce tubing and seal connector needed.  Butane Torch and Ratcheting Crimp tool recommended.  Questions, please ask.