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FIT-421 Heat Shrink Tubing

Part Number Size (in)Recovered I.D. (in)Nom. Rec. Wall Thick. (in)Expanded I.D. (in)Shrink Ratio
FIT-421-1-1/2 1 1/2 0.375 0.045 1.5 4:1
FIT-421-1IN 1 0.26 0.045 1 4:1
FIT-421-2IN 2 0.55 0.045 2 4:1
FIT-421-3IN 3 0.81 0.045 3 4:1
FIT-421-4IN 4 1.05 0.045 4 4:1
FIT-421 Heat Shrink Tubing
4:1 Shrink Ratio, XLPO

FIT-421 Heat Shrink Tubing Specifications:

  • AMS-DTL-23053/5 Class 1
  • UL 224 VW-1

FIT-421 Heat Shrink Tubing Characteristics:

  • Material: Cross-linked polyolefin (XLPO)
  • Color: black
  • Operating temperature: -55°C to +135°C
  • Alpha UL 224: -55°C to +125°C
  • Shrink temperature: 90°C min., 121°C full recovery

FIT-421 Heat Shrink Tubing Physical Properties:

  • Tensile strength: 1500 psi (10.34 N/mm2)
  • Elongation: 200% min
  • Longitudinal change: +5%/-15%
  • Specific gravity: 1.35
  • Flame retardant
  • Shelf life: 5 years at 18°C to 35°C

FIT-421 Heat Shrink Tubing Chemical Properties:

  • Corrosive effect: none
  • Fungus resistance: no growth
  • Water absorption: 0.5% max
  • Fluid resistance: 1000 psi (6.89 N/mm2)
  • UV resistant
  • Lead free

FIT-421 Heat Shrink Tubing Electrical Properties:

  • Alpha UL 224: 600 volts
  • Dielectric strength: 500 V/mil (197 kV/cm)
  • Volume resistivity: 1014 ohm-cm

FIT-421 Heat Shrink Tubing Features and Benefits:

Alpha Wire's FIT-421 Heat Shrink Tubing features a high-shrink ratio and large supplied diameters. FIT-421 tubing conforms to irregular shapes. Alpha's FIT-421 Heat Shrinkable Tubing also has low water absorption and is UV resistant.