21/07/2026

Heat Shrink Tubing, Bulk Reel, 2:1 Shrink Ratio, 1/2", 12.7/6.4 Dia, PO, Orange, 164.0 ft/reel


Art.-No. 309-21273

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  • Quick and easy shrinking TF21 tubing is widely used for insulating, mechanical protection, strain relief, marking, and bundling.
  • The excellent balance of electrical, mechanical and chemical properties meet and exceed industrial standards.
  • TF21 is UL-224 listed and available in a wide range of sizes and colors.


Application Due to it's versatility TF21 is suitable for a wide range of applications like electrical insulations, mechanical protection and marking.
Behavior At Low Temperature not cracking
Behaviour at Heat Shock not refractive, not fluid, not dripping
Behaviour at low Temperature test method SAE-AS23053
Color Orange (OG), High Voltage (HV)
Description TF21 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. TF21 is UL Recognized with a UL 224 VW-1 flame rating.
Elongation At Heat Aging 420%
Global Part Number TF21-12.7/6.4-PO-X-OG
Heat Aging Test 168h/175°C
Heat Aging test method SAE-AS23053
Heat Shock Test 4h/250°C
Packaging Type pack
Part No. 309-21273
Product Subfamily Non-Adhesive 2-to-1 Shrink Ratio
Short Description Heat Shrink Tubing, Bulk Reel, 2:1 Shrink Ratio, 1/2", 12.7/6.4 Dia, PO, Orange, 164.0 ft/reel
Type TF21-12.7/6.4
UV Resistant No
Bundle Diameter Max. (imperial) 0.50"
Bundle Diameter Max. (metric) 6.4mm
Bundle Diameter Min. (imperial) 0.25"
Bundle Diameter Min. (metric) 6.4mm
For Object Outside Diameter 7.66-11.44 mm
Length (metric) 50.0m
Longitudinal Change After Shrinkage +/-5%
Printable No
Recovered Diameter (imperial) 0.25"
Recovered Diameter (metric) 6.4mm
Reel Length (imperial) 164.0ft
Shrink Ratio 2:1
Size (imperial) 1/2"
Size (metric) 12.7 mm
Supplied Diameter (imperial) 0.5"
Supplied Diameter (metric) 12.7mm
Tensile Strength 14MPa
Volume Resistance 10¹⁴ Ω cm
Wall Thickness (imperial) 0.025"
Wall Thickness (metric) 0.64mm
CE Certification No
CSA Certified No
Dielectric Strength 30kV/mm
Elongation at break (min.) 400%
Elongation at break test method ASTM D638
Flammability ASTM D876
Halogen Free No
Material PO-X
Material Polyolefin, cross-linked (PO-X)
Min. Shrink Temperature +220 °F (+105 °C)
Operating Temperature -67°F to +275°F (-55°C to +135°C)
Prop65 Warning No
REACH Conformity No
ROHS Compliant Yes
Test Method Tensile Strength ASTM D638
UL File Number [Logo] E143529 [RU]
UL Listed (US and Canada) No
UL Listed (US) No
UL Recognized (US and Canada) No
UL Recognized (US) Yes
Carton Qty. 1
Customs Number 3926909988
Harmonized Tariff Schedule Code 3926.90.9989
Packaging 1 - Weight (kg) 2.7kg
Pkg. Qty. 164.0ft
Pkg. Qty. 50m
Reel Length (metric) 50.0m
UPC 089306475651

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