HellermannTyton HelaShrink 321 Heat Shrink Tubing 12.7mm Black 5 Pieces 1.2m

The HellermannTyton HelaShrink 321 heat shrink tubing provides reliable electrical insulation, cable bundling, and strain relief. Made from cross-linked polyolefin with a 2:1 shrink ratio, it offers excellent mechanical protection and flame retardancy. This pack contains 5 pieces, each 1.2 meters long, with a supplied internal diameter of 12.7 mm shrinking to 6.4 mm.

Advantages

High dielectric strength (20 kV/mm) and wide operating temperature range (-55°C to +135°C) ensure performance in demanding environments. UL224 VW-1 flammability rating and RoHS compliance guarantee safety and environmental standards.

Suitable for

• Electrical insulation of wires and cables
• Cable bundling and organization
• Strain relief at connectors and terminals
• Color coding and identification

Key specifications

• Product Type: Heat Shrink Tubing
• Series: HelaShrink 321
• Shrink Ratio: 2:1
• Material: Cross-linked Polyolefin
• Color: Black
• Supplied Internal Diameter: 12.7 mm
• Recovered Internal Diameter: 6.4 mm
• Recovered Wall Thickness: 0.8 mm
• Length per Piece: 1.2 m
• Quantity: 5 pieces
• Operating Temperature Range: -55°C to +135°C
• Minimum Shrink Temperature: +90°C
• Dielectric Strength: 20 kV/mm
• Flammability Rating: UL224 VW-1
• Approvals: UL, CSA, RoHS Compliant

Recommendations

For best results, use a heat gun or oven at a minimum of +90°C. Ensure the tubing is fully recovered and cooled before handling. Suitable for indoor and outdoor applications where protection against moisture and abrasion is required.