why do you crimp the connector 3x? One for each wire, what is the 3rd?

I’m not sure why you have to crimp 3x’s unless their tool is designed that way? I only crimped twice in my engine compartment of my pickup and have had no issues.

Will these work for 10/2 wire at 230V and 20 amps?

You should be able to use on 230 volt 20 amp. The yellow should handle 30 amp minimum. Usually if the wires fit in it. It will work

Do you have the Butt connectors that are 12-10 on one end and 16-14 on the other

No, they are the same on each end. The colors indicate the size, as well they are labeled.

Can these be submerged? I want to use them for a bilge pump.

Yes you can, the discription of the product says they are Marine Grade Waterproof Wire Connectors.

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🔥 Seal the deal with every splice! 🔧

CERTIFIED QUALITY - Meets ROHS, ISO 9001:2008, SGS, and CE standards—trusted performance for professional-grade repairs.
COPPER CORE POWER - High-thickness copper core ensures ultra-safe, reliable electrical connections every time.
HEAT SHRINK MASTERY - Translucent, high-tensile tubing resists stretch and damage, delivering a perfect crimp with every use.
COLOR CODED PRECISION - Four vibrant colors and clear wire gauge markings make selecting the right connector effortless and foolproof.
WATERPROOF CONFIDENCE - Inner hot melt adhesive guarantees a watertight seal—ideal for marine, automotive, and outdoor projects.

The haisstronica 200PCS Heat Shrink Butt Connectors kit features high-thickness copper cores and translucent heat shrink tubing with hot melt adhesive for waterproof, durable, and secure wire connections. With four sizes and color-coded tubing marked by wire gauge, it’s engineered for precision and ease across automotive, marine, aircraft, and electronics applications. Certified to global standards, this kit is the ultimate choice for professionals demanding reliability and quality.

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