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A plastic compartment box holding 330 colour-coded heat-shrink butt connectors in four sizes

Haisstronica 330PCS Heat Shrink Butt Connectors Marine Grade Waterproof UL Listed

SKU CH-R665-EWNBG

A 330-piece kit of UL-listed heat-shrink butt connectors covering wire gauges from 26-24 to 12-10 with adhesive-lined tubing for waterproof, flame-retardant seals

  • Certifications and standardsUL Listed
  • Product colorBlack
  • UL Listed for verified safety compliance
  • 330 pieces covering four wire gauge ranges
  • Tinned copper cores resist corrosion in marine environments
  • Translucent heat shrink with adhesive liner seals out water
  • Color coded tubing allows quick size identification

Marine-grade waterproof connectors

This kit supplies 330 UL-listed heat-shrink butt connectors for marine and automotive wiring. It covers four wire-gauge ranges from 26-24 AWG up to 12-10 AWG with colour-coded tubing for quick identification. The translucent polyolefin sleeves carry hot-melt adhesive that seals against moisture when heated. Installers working on boats, trucks or stereo systems can crimp and seal in one step.

Capacity and headroom across gauges

The assortment includes 150 pieces for 22-16 AWG, 100 pieces for 16-14 AWG, 32 pieces for 12-10 AWG and 48 pieces for 26-24 AWG. This mix handles most light-to-medium automotive and marine circuits but runs out quickly on heavy-gauge battery or starter cables. Larger projects may need supplemental kits for the bigger wire sizes.

UL-listed compliance decides fit

Every connector in the kit carries UL listing plus RoHS, ISO 9001:2008, SGS and CE marks. That certification chain is the single specification that determines whether the assortment meets regulated marine or vehicle wiring requirements. Buyers needing non-listed bulk terminals for non-critical prototyping should look elsewhere.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $41.99
Pricier than about 83% of the 1,040 comparable items (median $13.99).

Specifications

Product
Product colorBlack
Environment & compliance
Certifications and standardsUL Listed

Questions about this item

Will these butt connectors fit the 16 AWG wire already in my boat harness?

The kit includes 100 pieces sized for 16-14 AWG and 150 pieces for 22-16 AWG, so your existing 16 AWG wires are covered by two of the four colour-coded sizes.

How can I confirm the waterproof seal has formed correctly after crimping and heating?

The translucent tubing lets you see the adhesive melt and flow; a uniform, bubble-free shrink around the wire insulation shows the 3:1 ratio seal is complete.

Does the 330-piece assortment come with a crimping tool or must I supply my own?

Only the connectors are included — four colour-coded sizes totalling 330 pieces — so a suitable crimper for 26-10 AWG barrels is required separately.

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