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FIT-221 General Purpose 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-221-3/64 3/64 2:1 0.046 0.023 0.016 2.00
FIT-221-1/16 1/16 2:1 0.063 0.031 0.017 3.00
FIT-221-3/32 3/32 2:1 0.093 0.046 0.020 6.00
FIT-221-1/8 1/8 2:1 0.125 0.062 0.020 11.00
FIT-221-3/16 3/16 2:1 0.187 0.093 0.020 14.00
FIT-221-1/4 1/4 2:1 0.250 0.125 0.025 14.00
FIT-221-3/8 3/8 2:1 0.375 0.187 0.025 20.00
FIT-221-1/2 1/2 2:1 0.500 0.250 0.025 34.00
FIT-221-3/4 3/4 2:1 0.750 0.375 0.030 60.00
FIT-221-1 1 2:1 1.000 0.500 0.035 75.00
FIT-221-1-1/2 1 1/2 2:1 1.500 0.750 0.040 86.00
FIT-221-2IN 2 2:1 2.000 1.000 0.045 92.00
FIT-221-3 3 2:1 3.000 1.500 0.050 125.00
FIT-221-4 4 2:1 4.000 2.000 0.055 165.00

Alpha FIT-221 Heat Shrink Tubing (Cross-Linked Polyolefin)
M23053/5, CL1
SAE-AMS-DTL-23053/5, Class 1
2:1 Shrink Ratio


Alpha FIT-221 Standards:

Alpha Wire FIT 221 Description:

FIT-221 is designed to reduce production time and protect heat sensitive components in automatic assembly and cable jacketing applications. Alpha Wire FIT 221 possesses excellent physical, chemical, and electrical properties. When heated, the tubing forms a tight mechanical bond, providing insulation and protection. It is irradiated, thermally stable, and simple to use. FIT-221 tubing is available in an assortment of sizes and colors.

Alpha Wire FIT 221 Characteristics:

  • Shrinkage Ratio: Approximately 2:1 (50%) @ 121°C
  • Longitudinal Shrinkage: +/-5% (max.)
  • Operational Temp. Range: -55°C to +135°C
  • Dielectric Strength: 500 V/mil (197kV/cm)
  • Volume Resistivity: 1014 Ohm-cm
  • Specific Gravity: 1.35 (max.)
  • Tensile Strength: 1,500 psi (106 kg/cm2)
  • Ultimate Elongation: 200%
  • Secant Modulus: 2.5 x 104 max.
  • Flamability: self-extinguishing
  • Corrosive Effect: Passes Copper Stability Test
  • Fungus Resistance: No Growth

Alpha FIT-221 Applications:

  • General purpose insulation and repair
  • Cable harnessing and bundling
  • Cable and connector protection
  • Wire and tubing splicing and connecting
  • Automated cutting machines (spools)

Don't need the Alpha name-brand? Click here for Black and Colors or Clear 2:1 Heat Shrink Tubing.