Sumitomo Sumitube B2 1/8" Flexible Polyolefin 2:1 Heat Shrink Tubing - Black (By the Foot)

Black Sumitomo Sumitube B2 1/8" 2:1 heat shrink tubing

Sumitomo Sumitube B2 in black is flexible, flame-retarded polyolefin heat shrink tubing with a 2:1 shrink ratio for wire identification, insulation and protection of suitable terminations and light wire harness assemblies. This 1/8" size has a 2:1 shrink ratio and is sold by the foot in a continuous length.

The 2:1 recovery ratio reduces the expanded diameter to approximately one-half when fully recovered. Use the black finish for color-coded cable assemblies, wire marking and harness organization.

Ordering and choosing your size

Quantity 1 is 1 foot; quantity 10 is one continuous 10-foot length. Cut sections to suit your assembly. Choose tubing that passes over the largest component before heating and recovers sufficiently around the section you need to cover. The shrink ratio refers to diameter, not length. Confirm expanded and recovered inside-diameter limits when fit is critical.

Applications

• Color identification and bundling of electric wires.
• Insulation, protection and reinforcement of suitable wire joints and terminations.
• Protection of suitable resistors, capacitors and light harness components.

Specifications

• SUMITUBE B2; Black.
• Nominal 1/8 inch; original metric size 3.5 mm.
• 2:1 ratio; listed diameter shrink minimum 50%.
• Minimum shrink temperature 90°C.
• Longitudinal change 0 ±5%.
• Listed continuous operating range −55°C to +135°C.
• Listed SAE-AMS-DTL-23053/5 Class 3.
• Listed UL224: E48762, SUMITUBE B2 or 826; 125°C, 600 V, VW-1.
• Listed CSA C22.2 No. 198.1: LR33298; 125°C, 600 V, VW-1.

The 125°C UL/CSA rating is separate from the general operating range. For specification-controlled work, confirm applicable size, color, manufacturer documentation and assembly requirements; these details do not approve a finished assembly.

Other configurations

Other sizes and higher-expansion B2(3X), B2(4X) and B2(4XC) are separate products. Confirm fit and availability before choosing an alternative.