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Ten black polyolefin heat-shrink tubes six inches long

3M

3M FP301 3/16 in Black Heat Shrink Tubing 10 Pack

SKU CH-0EY6-JNF51

Thin-wall polyolefin tubing shrinks 2:1 to insulate 20-18 AWG wires, resisting flame, acids and solvents from -67 °F to 275 °F

  • Thin-wall polyolefin insulates wires reliably
  • 2:1 shrink ratio fits 20 AWG to 18 AWG conductors
  • Flame-retardant material meets 600 V dielectric strength
  • Resists acids, alkalis and solvents in harsh environments
  • Ten six-inch black pieces ready for immediate use

3M FP301 Heat Shrink Tubing 10 Pack

This pack contains ten individual pieces of thin-wall polyolefin tubing manufactured by 3M. Each piece measures six inches long before shrinking and carries a 2:1 shrink ratio. The material is flexible, flame retardant and resistant to acids, alkalis and solvents. It suits electricians and technicians who need reliable insulation for small-gauge wire repairs.

Suits 20 AWG to 18 AWG wire insulation

The tubing fits wires between 20 AWG and 18 AWG with an inner diameter of 0.19 inches that shrinks to 0.09 inches. The wall thickness after shrinking is 0.02 inches and the minimum shrink temperature is 212 degrees Fahrenheit. Buyers who need adhesive-lined tubing for environmental sealing or who work with larger wire gauges should look at other products. The operating temperature range extends from minus 67 to 275 degrees Fahrenheit.

2:1 shrink ratio decides fit

The 2:1 shrink ratio is the single specification that determines whether this tubing will fit the application. It reduces the inner diameter from 0.19 inches to 0.09 inches when heated above 212 degrees Fahrenheit. Dielectric strength is rated at 600 volts for electrical insulation. Verify the wire gauge and required shrink ratio before purchase to ensure compatibility.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 98% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand name3M

Questions about this item

Should I pick the 3/16 inch size or a different diameter for 20 AWG to 18 AWG wire?

The 3/16 inch tubing has a 0.19 in inside diameter before shrinking and 0.09 in after, matching the 20 AWG to 18 AWG range listed for this pack.

What does the 2:1 shrink ratio mean when I heat the tubing on a live job?

A 2:1 ratio means the 0.19 in tube shrinks down to 0.09 in, giving a tight seal once the minimum 212 Degrees F shrink temperature is reached.

Is the 600 V dielectric rating the practical limit for the thin wall material?

Yes, the thin wall polyolefin is rated at 600 V dielectric strength, so it insulates up to that voltage after shrinking to 0.02 in wall thickness.

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