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FIT-321 Medium Wall, Adhesive Lined, Irradiated Polyolefin Heat Shrink Tubing

Alpha Fit Polyolefin Shrink Tubing

FIT-321 Medium Wall, Adhesive Lined, Irradiated Polyolefin Heat Shrink Tubing

Part Number Size (in)Shrink RatioExpanded I.D. (in)Recovered I.D. (in)Nom. Rec. Wall Thick. (in)Approx LBS/MFT
FIT-321-1/8 1/8 3:1 0.120 0.040 0.040 13.00
FIT-321-1/4 1/4 3:1 0.240 0.080 0.040 18.00
FIT-321-1/2 1/2 3:1 0.470 0.160 0.070 32.00
FIT-321-1 1 3:1 0.94 0.320 0.100 65.00
FIT-321-1-1/2 1 1/2 3:1 1.57 0.510 0.100 120.00

Alpha Shrink Tubing, FIT-321 Medium Wall
Adhesive Lined, Irradiated Polyolefin Heat Shrink Tubing
3:1 Shrink Ratio


Alpha Shrink Tubing Specifications:

  • Color: Black
  • MIL-DTL-23053/4 CL3
  • RoHS Heat Shrink Tubing RoHS Compliant

Alpha FIT-321 Heat Shrink Tubing Applications:

  • Connectorized Cable Repair
  • Water Resistance and Encapsulation
  • Environmental and Outdoor Protection

FIT-321 Alpha Shrink Tubing Characteristics:

  • Shrinkage Ratio: Approximately 3:1 (33%) @ 125°C
  • Longitudinal Shrinkage: -15% (max.)
  • Operating Temp. Range: -55°C to +110°C
  • Dielectric Strength: 300 V/mil
  • Volume Resistivity: 1012 ohm-cm
  • Tensile Strength: 1300 psi
  • Ultimate Elongation: 300%
  • Heat Resistance: (168 Hours at 150°C) No Dripping, Cracking or Flowing
  • Low Temperature Flexibility: (4 Hours at -55°C) No Cracking
  • Flamability: Self-extinguising (Outer Jacket Only)
  • Corrosive Effect: Non-Corrosive
  • Fungus Resistance: No Growth
  • Water Absorption: 0.5% (max.)

Alpha Shrink Tubing Features:

  • Increased Wall Thickness for Durability
  • Water Resistant Adhesive Inner Lining
  • Permanent Bonding Adhesive