3M 8440 Silicone Rubber Cold Shrink Connector Insulators

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3M 8440 Silicone Rubber Cold Shrink Connector Insulators
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE); Silicone; Silicone Rubber
Material Notes:	3M™ Cold Shrink Connector Insulators 8440 Series are open ended, silicone rubber, tubular sleeves. The sleeves are factory expanded and assembled on a removable supporting plastic core. Each rubber assembly is supplied fro field installation in this pre-stretched condition. As the core is unwound, the insulating sleeve shrinks to form a tight seal. Three sizes of Cold Shrink Insulators cover terminal lug barrels and three sizes of Cold Shrinks Insulators cover inline connectors. Each insulator type, collectively has an application range of 0.35” (8.86 mm) to 0.95” (24.13 mm) for installations on #6 AWG to 3/0 AWG. Information provided by 3M
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Physical Properties	Original Value	Comments

Density	1.23 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Shore A	48	ASTM D2240-75
Tensile Strength, Ultimate	1240 psi	ASTM D412-75
100% Modulus	0.00124 GPa @Strain 100 %
Tear Strength Test	1.28	[Mpa], Die B; ASTM D624B-73

Electrical Properties	Original Value	Comments
Dielectric Strength	543 kV/in	7 days @ 90°C in water; ASTM D149-75
	554 kV/in @Thickness 1.78 mm	ASTM D149-75

Descriptive Properties
Appearance	Gray

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PMM35150 / 169897

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