01/08/2026

Heat Shrink Tubing, HIS-3-Bag, 3:1 Shrink Ratio, 3/16", 4.8/1.5 Dia, PO, Black, 10/pkg


Part No. 308-30420

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  • Thin wall, flexible 3 to 1 shrink ratio material accommodates a wide range of component shapes and diameters.
  • Meets UL224 VW-1 specifications, making it ideal for high heat applications (excludes clear tubing).
  • Polyolefin material provides excellent insulation and mechanical strength with good resistance to solvents, oils and fuels.
  • Available in bulk reels, sticks and convenience bags (HIS-3 bags), for small to large volume applications.


Behavior At Low Temperature not cracking
Behavior at Heat Shock not fluid, not dripping, not cracking
Behavior at Low Temperature test method UL 224
Color Black (BK)
Description TFN31 series heat shrink tubing features a flexible, thin wall and highly flame retardant polyolefin material with a higher operating temperature range than general-use heat shrink tubing. and offers good resistance to solvents, oils and fuels. The 3 to 1 shrink ratio accommodates a variety of component shapes and sizes. TFN31 tubing is available in bulk reels, sticks and convenience bags (HIS-3 bags), for projects of all sizes.
Elongation At Heat Aging 400%
Global Part Number HIS-3-BAG 4.5/1.5 BK-PO-X-BK
Heat Aging Test 168h/175°C
Heat Aging test method UL 224
Heat Shock Test 4h/250°C
Minimum Tensile Strength At Heat Aging 13MPa
Part Number 308-30420
Short Description Heat Shrink Tubing, HIS-3-Bag, 3:1 Shrink Ratio, 3/16", 4.8/1.5 Dia, PO, Black, 10/pkg
Type HIS-3-BAG 4.5/1.5 BK
For Object Outside Diameter 2.16-4.14 mm
Length (metric) 200mm
Length 3 (imperial) 6.0"
Length 3 (metric) 152.4mm
Longitudinal Change After Shrinkage +/-5%
Nominal Diameter (imperial) 0.19"
Nominal Diameter (metric) 4.5mm
Printable No
Recovered Diameter (imperial) 0.059"
Recovered Diameter (metric) 1.5mm
Shrink Ratio 3:1
Supplied Diameter (imperial) 0.188"
Supplied Diameter (metric) 4.8mm
Tensile Strength 14MPa
Trade Size 3/16 "
Volume Resistance 10¹⁴ Ω cm
Wall Thickness (imperial) .024"
Wall Thickness (metric) 0.60mm
CSA Certified No
Dielectric Strength (metric) 32kV/mm
Dielectric Strength test method IEC 60243
Elongation at break (min.) 800%
Elongation at break test method ASTM D2671
Flammability UL 224 VW-1
Material PO-X
Material Polyolefin, cross-linked (PO-X)
Min. Shrink Temperature +212 °F (+100 °C)
Operating Temperature -67°F to +275°F (-55°C to +135°C)
REACH Conformity Yes
ROHS Compliant Yes
Self Extinguishing Yes
Tensile Strength Test Method ASTM D2671
UL File Number [Logo] E125182 [cRUus]
UL Listed (US and Canada) No
UL Listed (US) No
UL Recognized (US and Canada) Yes
UL Recognized (US) Yes
Volume Resistance test method UL 224
Carton Qty. 1000
Customs Number 3926909988
Packaging Type bag
Pkg. Qty. 10
Pkg. Qty. 10Pieces
UPC 089306362722

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