3M FP301 3/4 in Clear Heat Shrink Tube 12 pcs

3M FP301 Clear Heat-Shrink Tubing

This 3M FP301 tubing is a thin-wall, flexible polyolefin sleeve supplied in twelve clear pieces each four feet long. It suits electrical and automotive technicians who need reliable insulation, strain relief or identification on wire sizes from 4 AWG up to 3/0 AWG. The material resists acids, alkalis and common solvents while remaining flame-retardant.

Thin-Wall Upgrade for Tight Bundles

The 2:1 shrink ratio reduces the 0.75 in inside diameter to 0.38 in with a recovered wall thickness of only 0.03 in, making it thinner than many general-purpose alternatives. That slim profile is worth choosing when space inside a loom or conduit is limited and a heavier wall would add unwanted bulk. Minimum shrink temperature is 250 °F.

Build Integration and Clearance

Each piece withstands continuous temperatures from -67 °F to 275 °F and carries a 600 V dielectric strength rating, so it fits directly into harnesses that see wide thermal swings and moderate voltage. The clear colour lets inspectors verify splice quality without removing the tubing. No adhesive lining means the sleeve slides off for rework if required.