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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haisstronica 330PCS Heat Shrink Butt Connectors, 26-10 AWG

Product ID: 353304432

Details

Colour
Red blue white
Connector Type
Butt Splice
Contact Material
Copper
Insulation Material
Polyolefin
Terminal
Butt Terminal

💧Waterproof seal with hot melt adhesive

🔥Heat shrink tubing with 3:1 shrink ratio

🛠️330PCS assorted sizes for every project

¥18214

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Seal the deal with connectors that never quit!

PREMIUM COPPER CORE - Thicker copper core ensures safer, more reliable electrical connections with superior conductivity
COMPLETE CONNECTOR KIT - 330 precision-sized connectors covering AWG 26-10 for flawless fits every time
COLOR CODED CONVENIENCE - Easily identify wire gauge with vibrant, translucent tubing for faster, error-free installations
MARINE GRADE DURABILITY - Waterproof, flame-retardant, and corrosion-resistant—built to withstand harsh environments
CERTIFIED QUALITY ASSURANCE - ROHS, ISO 9001, SGS, and CE compliant—trusted by professionals worldwide

The Haisstronica 330PCS Heat Shrink Butt Connectors kit offers a professional-grade, marine-certified solution for all your electrical wiring needs. Featuring a thick copper core and high-strength, translucent heat shrink tubing with a 3:1 shrink ratio, these connectors provide waterproof, flame-retardant, and corrosion-resistant seals. Color-coded for quick gauge identification and compliant with global safety standards, this kit is perfect for boats, trucks, home projects, and more—ensuring reliable, long-lasting connections every time.

Specifications

ASIN	B07Q3JJRY8
Brand Name	haisstronica
Colour	Red,Blue,Yellow,White
Connector Gender	Male
Connector Type	Butt Splice , Crimp
Contact Material	Copper
Customer Reviews	4.8 out of 5 stars 4,862 Reviews
Insulation Material	Polyolefin
Insulation Material Type	Polyolefin
Item Dimensions L x W x H	20L x 20W x 20H Millimeters
Item Highlight	3:1 adhesive-lined heat shrink, built-in wire stop, 4 color-coded sizes for marine, automotive, and trailer wiring
Manufacturer	haisstronica
Material	Copper
Material Type	Copper
Maximum Voltage	12 Volts (DC)
Model Number	HS
Number of Items	330
Part Number	HX1045
Specification Met	CE
Temperature Rating	150 degree celsius
Terminal	Butt Terminal
Terminal Type	Butt Terminal
UPC	192687298006
Unit Count	330 Count

Reviews

S**T

👍

Gute Qualität

11.06.2026

J**L

plutôt pour des gros fils

Il vaut mieux bien insister pour sertir sinon ça ne tient pas.

1.08.2025

M**L

good quality good price

a great set best i have found for the price and it got here on time. great seller this order helped to get my project done in prep for winter

3.10.2026

M**.

Better than expected

Really appreciate the results, seems solid and shrink around the wire perfectly

21.08.2024

N**B

I was sceptical

These work a treat, very happy

14.12.2025

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¥18214

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Great experience from order to delivery. Highly recommended!

1 week ago

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