OptiSeal Heat Shrink Butt Splices

Crystal Clear Butt Connections

NSPA-OS55-16
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What's special about these butt connectors?

  • Made with Crystal Clear™ heat shrink tubing to allow full visual inspection of splices prior to crimping
  • Lined with a hot melt adhesive to completely seal out dust, dirt, and water, protecting the integrity of your splice
  • Color-coded strips on the connector barrel indicate which wire gauge to be used with the connector
  • 2.5:1 shrink ratio accommodates wires of various sizes
  • Click for More Features
RoHS Compliant

OptiSeal heat shrink butt splices are made with a specially formulated crystal clear heat shrink tubing to provide a clear view of connections prior to crimping.  This additional clarity ensures that your splices are crimped correctly and will work as they should.


Part #Tubing DiameterColor CodeMax. Expanded IdMin. Recovered IdPackagePrice
NSPA-OS55-1618-22 AWGRed0.260"0.045"50 pcs
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NSPA-OS55-1010-12 AWGYellow0.375"0.100"
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  • One-piece, seamless design provides greater conductivity
  • Equipped with a wire stop to prevent over-inserting of wires when crimping
  • Heat shrink is made of a specially formulated cross-linked ionic polymer for extreme strength
  • High tensile strength to resist breakage
  • RoHS Compliant
Material Cross-linked ionic polymer
Shrink Ratio Exceeds 2.5 to 1
Shrink/Recovery Temperature 194° F (90° C)
Continuous Operating Temp -67° to 257° F (-55° to 125° C)
Flammability Passed (FMVSS 302 test)
Tensile Strength 4,000 PSI
Longitudinal Change +1/-10% Max
Dielectric Strength 750 V/Mil (30KV/MM)

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