NSPA OptiSeal Waterproof Crimp Step Down Butt Connectors, Blue/Yellow 16-14 to 12-10 AWG


Wire Gauge: Blue/Yellow, 16-14 to 12-10 AWG
Package Quantities: 10
Price:
Sale price$10.67

Description

SES Opti-Seal Step-Down Connector – 16-14 to 12-10 AWG, Clear Waterproof Heat Shrink

Monster Overview:

For reliable connections between dissimilar wire gauges, the SES Opti-Seal™ Step-Down Butt Connector delivers precision and protection. This clear 16–14 to 12–10 AWG connector features a seamless tapered design with internal wire stop and color-coded strip markers for quick identification and proper sizing.

Designed for marine, automotive, and trailer wiring, these RoHS compliant, USA-made connectors feature adhesive-lined polyolefin tubing that provides a waterproof seal while allowing full visual inspection of the crimp and connection.

Monster Features:

  • Brand: SES Opti-Seal™
  • Connector Type: Step-Down Crimp and Seal Butt Connector
  • Seal Type: Crimp & Seal with adhesive-lined heat shrink tubing
  • Made in: USA
  • Design: Tapered seamless barrel with internal wire stop and strip markers
  • Visual Inspection: Clear tubing for crimp and shrink verification
  • Tubing: Adhesive-lined polyolefin, 3:1 shrink ratio
  • Waterproof Rating: IP67 when properly installed*
  • Compliance: RoHS compliant

Monster Specifications:

  • Color Code: Clear with Blue / Yellow strip marker
  • Wire Size Compatibility: 16–14 AWG to 12–10 AWG
  • Part #: OS56-14
  • Seam Type: Seamless tapered barrel with central stop
  • Material: Tinned copper + adhesive-lined heat shrink tubing

Installation Instructions:

  1. Strip both wires to 5/16" (8 mm)
  2. Insert wires until they meet at the internal wire stop
  3. Crimp securely using a ratcheting crimp tool
  4. Apply heat evenly to shrink tubing and activate adhesive seal

For best results: Use a heat tool capable of at least 1000 °F (538 °C). Rotate the connector and distribute heat evenly—do not overheat or isolate flame in one area.

Order Yours Today from Monster Bolts!

Whether you're upgrading trailer wiring or tackling a complex electrical project, Opti-Seal step-down connectors ensure your splice is clean, secure, and sealed. Order now from Monster Bolts and ship fast from the USA!

* There is no official UL standard for “waterproof” connectors. When properly installed, these connectors typically meet IP67: fully dust-tight and protected from temporary immersion (15 cm to 1 m for up to 30 minutes).

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