06/07/2026

Heat Shrink Tubing, 4' Long Stick, 2:1 Shrink Ratio, 1/16", 1.6/0.8 Dia, PO, Blue, 20/pkg


Art.-No. 309-65103

| TFN21-ST 1.6/0.8-PO-X-BU

 | 

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  • Thin, 2 to 1 shrink ratio tubing provides insulation and abrasion protection for wires and cables.
  • Flammability rating of UL224 VW-1 for use in applications requiring the highest degree of flame protection (excludes clear tubing).
  • Flexible-yet-durable material resists most common oils, chemicals and fluids.
  • Available in a variety of diameters and colors for identifying and marking wires and cables.
  • Available in mini reels, bulk reels, and sticks for small to large volume applications.


Behaviour At Low Temperature not cracking
Behaviour at Heat Shock not cracking, not breaking, not fluid
Behaviour at low Temperature test method UL 224
Brand Family TFN21
Color Blue (BU)
Description TFN21 is a highly flexible thin wall heat shrink tubing with a 2 to 1 shrink ratio and excellent flame retardant properties. In addition to providing insulation and abrasion protection for wires and cables, the polyolefin material also offers resistance to oils, solvents and chemicals. Available in mini reels, bulk reels and sticks, for small to large volume applications.
Elongation At Heat Aging 700%
Heat Aging Test 168h/175°C
Heat Aging test method UL 224
Heat Shock Test 4h/250°C
Minimum Tensile Strength At Heat Aging 13.5MPa
PART DESCRIPTION TFN21-ST 1.6/0.8-PO-X-BU
Packaging Type pack
Part No. 309-65103
Product family Insulation
Short Desc. Heat Shrink Tubing, 4' Long Stick, 2:1 Shrink Ratio, 1/16", 1.6/0.8 Dia, PO, Blue, 20/pkg
Type TFN21-ST 1.6/0.8
For Object Outside Diameter 0.96-1.44 mm
Length (metric) 300m
Length 2 (imperial) 4.0ft
Length 2 (metric) 1.22m
Longitudinal Change After Shrinkage +/-5%
Nominal Diameter (imperial) 0.06"
Nominal Diameter (metric) 1.6mm
Printable No
Recovered Diameter (imperial) 0.032"
Recovered Diameter (metric) 0.8mm
Shrink Ratio 2:1
Supplied Diameter (imperial) 0.063"
Supplied Diameter (metric) 1.6mm
Trade Size 1/16 "
Tube Shape Round
Volume Resistance 10¹⁴ Ω cm
Wall Thickness (imperial) .016"
Wall Thickness (metric) 0.40mm
CSA Certified Yes
Dielectric Strength 20kV/mm
Dielectric Strength test method ASTM D150
Elongation at break (min.) 600%
Elongation at break test method ASTM D2671
Flammability UL 224 VW-1
Halogen Free No
Material PO-X
Material Polyolefin, cross-linked (PO-X)
Min. Shrink Temperature +158 °F (+70 °C)
Operating Temperature -67°F to +275°F (-55°C to +135°C)
REACH Conformity Yes
ROHS compliant Yes
Test Method Tensile Strength 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
Customs Number 3926909988
Pkg. Qty. 20
Pkg. Qty. 20Pieces

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