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Ten black heat-shrink tubes 1.5 in diameter 6 in long

3M

3M FP301 1.5 in Heat Shrink Tube 6 in Black 10 Pack

SKU CH-KNNC-QZC5T

Thin-wall polyolefin tubing shrinks 2:1 to 0.75 in for 500-800 MCM wires, resists flame, acid, solvents and -67 °F to 275 °F

  • TypeCable Management & Conduit
  • 2:1 shrink ratio fits 500–800 MCM wire
  • Thin-wall polyolefin resists acids, alkalis and solvents
  • Flame-retardant material rated from –67 °F to 275 °F
  • Shrinks at 212 °F with 600 V dielectric strength
  • Ten six-inch black pieces supplied ready to use

3M FP301 Heat Shrink Tubing 1.5 in ID

This pack contains ten black polyolefin tubes each six inches long. The thin-wall tubing shrinks at a 2:1 ratio from a 1.5 inch inside diameter down to 0.75 inch. It is rated for wire sizes from 500 MCM to 800 MCM and operates between -67 and 275 degrees Fahrenheit. The material is flame retardant and resistant to acids, alkalis and solvents.

Thin wall and no adhesive change the fit

Without an adhesive liner the tube relies on mechanical grip after shrinking. The 0.04 inch recovered wall thickness keeps the assembly flexible for routing through tight spaces. Minimum shrink temperature is 212 degrees Fahrenheit so a standard heat gun activates it quickly. Individual pieces let you cut exact lengths without waste.

2:1 ratio and 600 V dielectric limit the application

The tubing only halves its diameter so connectors larger than 1.5 inches will not pass through. Dielectric strength of 600 volts restricts use to low-voltage circuits. California Proposition 65 warning applies because the material contains a listed chemical. Buyers needing higher shrink ratios or adhesive sealing must choose a different product.

Highlights

  • 2:1 shrink ratio fits 500–800 MCM wire
  • Thin-wall polyolefin resists acids, alkalis and solvents
  • Flame-retardant material rated from –67 °F to 275 °F
  • Shrinks at 212 °F with 600 V dielectric strength
  • Ten six-inch black pieces supplied ready to use

Specifications

Brand3M
TypeCable Management & Conduit

Questions about this item

How often will the 2:1 shrink-ratio polyolefin tubing need to be replaced after it has been shrunk onto 500-800 MCM wire?

Once the tubing is shrunk at 212 °F it forms a permanent, flame-retardant seal rated from -67 °F to 275 °F, so no scheduled replacement is required unless the insulation is physically damaged.

What is the first limitation you hit when running this heat-shrink continuously at high temperature?

The dielectric strength is rated at 600 V and the maximum continuous operating temperature is 275 °F; exceeding either limit will cause insulation breakdown first.

How much heat does the tubing itself generate when it stays at 275 °F all day?

The polyolefin material does not generate heat; it simply withstands ambient temperatures up to 275 °F while remaining flexible, acid-resistant and solvent-resistant.

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