Certifications and approvals - Underwriters Lab, Canadian Standards Association, Restriction of Hazardous Substances, and Mil Spec approvals

GMT-621 Heavy Duty High Shrink Ratio Heat Shrinkable Tube

Heavy Adhesive, High Temperature Heat Shrink Tube


GMT-621 is a heavy duty high shrink ratio heat shrinkable tube. With a 6:1 shrink ratio, rugged wall and heavy adhesive this heat shrink tube is designed to stand up to some of the most rugged environments. GMT-621 Shrink Tube has a high impact and abrasion resistance. The heavy glue flows nicely and seals like none other. The high shrink ratio allows for covering of various diameters, shapes, connectors and joints. It's perfect for outdoor applications, because of how well the adhesive seals. This product may also be used to fix difficult automotive applications, where parts have become obsolete.

Availability: Verify Availability Before Ordering

Description

Details

GMT-621 Heat Shrink Tube Applications

  • Insulation & Strain Relief for Heavy Duty Connections and Wire Terminals
  • Cable & Connector Protection
  • Electrical Insulation
  • Superior Mechanical Protection
  • UV Resistance
  • Weather Resistance for Terminals and Cables
  • Available in Black color only

Key Features

Key Features

GMT-621 Heat Shrink Tube Characteristics

  • Operating Temperature -55⁰ To 110⁰ Celsius
  • Minimum Full Recovery 120⁰ Celsius
  • 6:1 Shrink Ratio
  • Available in Black Only

GMT-621 Shrink Tubing Packaging

  • Standard Packaging in 4 FT lengths
  • Cut to Length Pieces are Available Per Request

Part Number Example

  • GMT-621-1-3/4-0 = 1.75" ID Before Recovery Black Shrink Tube
  • GMT-621-2-0-2.5 = 2" ID Before Recovery Black Shrink Tube Cut to 2.5 Inches

Specification

Specification

Gamma

Part No.

Inside Diameter

Recovered Wall Thickness

After Heating

Min. Expanded as Supplied Max. Recovered After Heating
W/ Size mm inch mm Inch mm inch
GMT-621-3/4 19 0.75 3.2 0.13 3.2 0.126
GMT-621-1-1/3 33 1.30 5.5 0.22 3.4 0.134
GMT-621-1-3/4 44.4 1.75 7.4 0.29 3.6 0.142
GMT-621-2 50.8 2.00 8.3 0.33 4.3 0.169
GMT-621-2-3/4 69.8 2.75 11.7 0.46 4.8 0.189
GMT-621-3-1/2 88.9 3.50 17.1 0.67 4.8 0.189
GMT-621-4-3/4 119.4 4.70 22.9 0.90 4.8 0.189
GMT-621-9-1/4 235 9.25 40 1.57 4.8 0.189

Properties

Properties

Property Test Method Standard
Operating Temperature IEC216 -55°C to 110°C
Tensile Strength ASTM D 2671 >14MPa
Elongation at Break ASTM D 2671 >400%
Elongation at Break after Aging 160C, 168hrs >300%
Density ASTM D 792 1.05g/cm^3
Longitudinal Shrinkage UL 224 0 to -10%
Eccentricity ASTM D 2671 <40%
Dielectric Strength IEC 243 >20KV/mm
Volume Resistance IEC 93 >10^ .cm
Copper Stability ASTM D 2671 Pass
Resistance to stress cracking (50°C) ASTM D 1693 No Cracking
Water Absorption ISO 62 <0.15%