WesBell Electronics
Alpha FIT 421 Heat Shrink Tubing

Alpha FIT 421 Heat Shrink Tubing


4 to 1 Adhesive Lined Polyolefin


Characteristics:


  • Temperature range -55°C to +90°C
  • 4 to 1 Shrink Ratio
  • 4 foot lengths or spools
  • Colors: Black only

Insulation:


  • Tensile strength: 1500 psi
  • Ultimate elongation: 200%
  • Longitudinal shrinkage: -10%
  • Flammability: Self extinguishing

Chemical Properties:


  • Corrosive effect: Passes copper stability test
  • Fungus resistant: No growth

Applications:


  • Over expanded 4 to 1 shrink ratio
  • Large supplied diameter sizes
  • Resistant to water, fungus and UV light
  • Shrinks to 25% of its size
  • Conforms to odd shapes
  • D-Sub connector strain relief
  • RS-232 25 Pin connector to cable coverage
  • Covers most irregular shapes and connectors
  • PC board coverage and protection
  • XTRA Guard 1 applications

Part Number Minimum I.D. Minimum Recovered I.D. Recovered Wall Thickness
Alpha FIT 421 1" 1.00" .275" .045"
Alpha FIT 421 1 1/2 1.50" .375" .045"
Alpha FIT 421 2" 2.00" .550" .045"
Alpha FIT 421 3" 3.00" .810" .045"
Alpha FIT 421 4" 4.00" 1.05" .045"

 

 

 

Alpha FIT 421 Adhesive Lined Polyolefin Tubing

Alpha FIT 421 Heat Shrink Tubing

This page focuses on the Alpha FIT 421 heat shrink tubing. It's a 4 to 1 shrinkable tubing manufactured with irradiated polyolefin and a temperature range of -55°C to 90°C. It features an over expanded shrink ratio of 4 to 1. Alpha Wire recommends using this shrinkable tubing on D-Sub connectors, large supplied diameter sizes and where the tubing needs to conform to odd or irregular shapes.

In the manufacturing process FIT 421 heat shrink tubing is used with connectors where the tubing needs to shrink different amounts in order to fit snug onto a cable and its connector. It's very convenient to have a shrink tubing that can shrink to any shape with different thicknesses between 1" and 4".

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