Optiseal Clear Step-Down Heat Shrink Butt Connector - 16-14 to 12-10 AWG - Crimp & Seal - 10 to 500 pack - 10 to 500 Pack - Made in USA

Optiseal clear heat shrink step-down butt connectors are engineered for high-integrity splicing of dissimilar wire gauges in harsh automotive, marine, and industrial environments. These connectors feature crystal-clear insulation that provides full visibility of wire insertion, strip length, and crimp quality—ensuring a professional, secure, and waterproof connection every time.

Key Features

• Step-down configuration: joins 16–14 AWG wire to 12–10 AWG wire
• Crystal-clear polyolefin insulation allows complete visual inspection
• 45° flared barrel and window butt design confirm proper wire insertion and strip length
• Color-coded alignment stripes aid in precise crimp positioning by wire gauge
• Adhesive-lined heat shrink tubing forms a watertight, corrosion-resistant seal
• Ideal for automotive harness repair, marine wiring, trailer rewiring, and fleet maintenance
• Compatible with standard crimping tools and heat guns
• Made in the USA using marine-grade materials for extended service life

Technical Specifications

• Type: Step-down butt splice connector
• Input Wire Range: 16–14 AWG
• Output Wire Range: 12–10 AWG
• Barrel Material: Tin-plated copper for conductivity and corrosion resistance
• Insulation: Heat-shrinkable, clear polyolefin with adhesive lining
• Operating Voltage: Up to 600V (inline applications)
• Operating Temperature: -55°C to +125°C
• Standards: Meets or exceeds SAE J163, UL 486D, ABYC E-11 marine electrical requirements

Application Notes

Optiseal connectors are the preferred choice for technicians requiring dependable, sealed wire-to-wire connections across mixed-gauge circuits. Whether in engine bays, trailers, watercraft, or utility service vehicles, these step-down butt splices offer a fast, professional-grade repair or installation solution.