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SKU: OS56-14-10
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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
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$12.49 USD
Sale price
$12.49 USD
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Product Description
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.


