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20/02/2026

Heat Shrinkable Tubing 3:1 flexible 40/13 black
Art.-No. 333-34000 | TF31-40/13-PO-X-BK

Polyolefin heat shrink tubing resists most common oils, chemicals and fluids.

Heat Shrink Tubing 3:1

3:1 shrink ratio allowing for a wider range of application.

Tubing is 3:1, thin wall and highly flame retardant.
High shrink ratio allows material to be used with varying substrates.
Available in multiple colors for easy marking and handling.

Package size

30 m

60 m

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Base Data

Application	If higher fire protection is a requirement TF31 heat shrinkable tubing is a good choice. It is used for protection, insulation and identification wires, cables and light duty harnesses.
Behaviour At Low Temperature	not cracking
Behaviour at Heat Shock	not dripping, not fluid, not cracking
Behaviour at low Temperature test method	UL 224
Brand Family	TF31
Color	Black (BK)
Description	TF31 Heat Shrink is a thin wall tubing widely used for insulation and identification of wires, cables and light duty harnesses. Polyolefin material is highly flame retardant with a high shrink ratio. Available in a wide range of colors and diameters up to 1.5" (40.0mm) with various lengths. TF31 is UL224 125 °C 600V VW-1, CSA and RoHS.
Elongation At Heat Aging	400%
Heat Aging Test	168h/158°C
Heat Aging test method	SAE-AMS-DTL-23053
Heat Shock Test	4h/250°C
PART DESCRIPTION	TF31-40/13-PO-X-BK
Packaging Type	reel
Part No.	333-34000
Product family	Insulation
Type	TF31-40/13

Product Dimensions


For Object Outside Diameter	18.4-34.6 mm
Longitudinal Change After Shrinkage	+5%/-15%
Printable	No
Recovered Diameter (metric)	13.0mm
Shrink Ratio	3:1
Supplied Diameter (metric)	40.0mm
Volume Resistance	10¹⁴ Ω cm
Wall Thickness (metric)	1.25mm

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Material and Specifications

Dielectric Strength	30kV/mm
Elongation at break (min.)	4%
Elongation at break test method	ASTM D638
Flammability	UL 224 VW-1
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)
REACH Conformity	No
ROHS compliant	Yes
Test Method Tensile Strength	ASTM D638
UL File Number [Logo]	E143529 [RU]
UL Recognized (US and Canada)	No
UL Recognized (US)	Yes
Volume Resistance test method	ASTM D876

Logistic and Packaging


Packaging 1 - Weight (kg)	2.31kg
Pkg. Qty.	30m

More Information

Calculators

Calculator tool for Heat Shrink Tubing

Calculator tool for Heat Shrink Tubing

for TF31-40/13 - Art.-No.: 333-34000
In selecting the right shrink tubing size it is important to consider to "80:20 rule". Shrink tubing should recover at least 20% and maximum 80% of its potential shrink range.
According to which specification would you like to check if the selected product is suitable for your application?

diameter

Please enter either the smallest and/or the largest outer diameter of the substrate.

Min mm Max mm

Cross-Section

Please enter either the smallest and/or largest cross-section of the object to be covered.

Min mm² Max mm²

perimeter

Please enter either the smallest and/or largest perimeter of the object to be covered.

Min mm Max mm
Wall thickness calculator

Wall thickness calculator

for TF31-40/13 - Art.-No.: 333-34000

Depending on the substrate dimensions when Heat shrink tubing is recovered the diameter and the wall thickness will change. This Calculator aims to offer a theoretical wall thickness for this situation.Please enter the outer diameter of the object to be covered

Outer diameter of object (A)

mm

Inner diameter of tubing after shrinking (B)

mm

Wall thickness fully recovered ( C )

mm

Solutions

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