NSPA OptiSeal Waterproof Crimp Step Down Butt Connectors, Blue/Yellow 16-14 to 12-10 AWG

Wire Gauge: Blue/Yellow, 16-14 to 12-10 AWG
Package Quantities: 10
Sale price$9.59


Opti-Seal OS56-14 - Crimp and Seal Step-Down Wire Connectors.   These are waterproof* heat shrink sealed electrical connectors.   These are RoHS compliant and made in the USA.   There simply is no better product made.  

  • Color: Crystal Clear with  Blue/Yellow  wire size strip marker
  • Wire Size:  16-14 AWG to 12-10 AWG (Part # OS56-14)
  • Product Name: SES 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 tapered
  • Part #: OS56-14


  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.

*  There is no official UL Standard for 'waterproof' electrical connectors. Connectors would most likely fall in the IP67 range (IP - Ingress Protection, 6 - Totally protected against dust, 7 - Protected against the effects of temporary immersion between 15cm and 1m. Duration of test 30 minutes)

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