Part # Shrink Ratio  Material  Min Supplied ID  Max Recovered ID  Nom Recovered Wall  Temperature  Ratings 
FIT-321V-1/4 3:1  Flexible XLPO  0.24  0.08  0.028  -55 to 125  AMS DTL-23053/5 CL1 with exception to dimensions, AMS DTL-23053/5 CL3 with exception to dimensions, CA Prop 65, CSA 198, REACH Regulation, RoHS, UL 224, UL VW-1 
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1) Tubing Type Heat Shrinkable Tubing
2) Tubing Material Flexible Cross Linked Polyolefin Thin Wall
3) Minimum Supplied ID(In) 0.240
4) Maximum Recovered ID (In) 0.080
5) Nominal Recovered Wall Thickness(In) 0.028
6) Color(s) BLACK, WHITE
1) UL Standard 224 125°C / 600 VRMS
 VW-1 
2) CSA International Standard 198 
3) Other AMS-DTL-23053/5 Class 1 & 3 except dimensions 
1) EU Directive 2011/65/EU(RoHS2):
 All materials used in the manufacture of this part are in compliance with European Directive 2011/65/EU regarding the restriction of use of certain hazardous substances in electrical and electronic equipment. Consult Alpha Wire's web site for RoHS C of C.
2) REACH Regulation (EC 1907/2006):
 This product does not contain Substances of Very High Concern (SVHC) listed on the European Union's REACH candidate list in excess of 0.1% mass of the item. For up-to-date information, please see Alpha's REACH SVHC Declaration.
3) California Proposition 65:The outer surface materials used in the manufacture of this part meet the requirements of California Proposition 65.
Physical & Mechanical Properties
1) Temperature Range -55 to 135°C 
2) Shrink Ratio Approximately 3:1 
3) Full Recovery Temperature 135°C 
4) Minimum Shrink Temperature 90 °C 
5) Tensile Strength 1500psi, Min ASTM D638
6) Elongation 200%, Min ASTM D638
7) Low Temperature Flex(-55°C) no cracking AMS-DTL-23053
8) Heat Resistance(175°C,168hrs) 100% Elongation, Min ASTM D638
9) Heat Shock(250°C,4hrs) no cracking AMS-DTL-23053
10) Secant Modulus 2.5x10 4 psi, Min ASTM D882
11) Longitudinal Change +5%/-15% AMS-DTL-23053
12) Specific Gravity 1.35, Max ASTM D792
13) Shelf Life 25 Years @ 18 to 35°C 
Electrical Properties
1) Dielectric Strength 500 V/mil, Min ASTM D876
2) Volume Resistivity 1x10 14 ohm-cm, Min ASTM D876
Chemical Properties
1) Water Absorption 0.50%, Max ASTM D570
2) Corrosion(175°C,16hrs) no corrosion AMS-DTL-23053
3) Fluid Resistance(23°C,24 Hrs) 1000 PSI, Min AMS-DTL-23053
4) Fungus Resistance Pass AMS-DTL-23053
5) Halogen Free No 
6) Lead Free Yes 
Packaging
250 FT
Notes
1) Other colors available upon request for F321V3/8, 1/2, 3/4 and 1 inch sizes.

Our FIT heat-shrink tubing offers a reliable way to protect and seal terminations or add additional mechanical ruggedness. FIT preferred heatshrink products are made from premium compounds under the tightest manufacturing controls. This means FIT will consistently have excellent physical characteristics such as low longitudinal shrinkage and wide temperature ranges while providing an elegant appearance when used alone or on OEM equipment.

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