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.

haisstronica 330PCS Heat Shrink Butt Connectors-Waterproof Electrical Wire Connectors-Insulated Crimp Connectors Butt Splice for Watercraft, Electrical,Electronics,Automotive (4 Colours / 4 Sizes)

haisstronica 330PCS Heat Shrink Butt Connectors-Waterproof Electrical Wire Connectors-Insulated Crimp Connectors Butt Splice for Watercraft, Electrical,Electronics,Automotive (4 Colours / 4 Sizes)

Product ID: 266441876

Details

Colour
Red blue white
Connector type
Crimp
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/colors

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€ 64.29

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Seal the deal with every crimp — connect like a pro! 🔧

PREMIUM COPPER CORE - Thicker copper core ensures safer, more reliable electrical connections every time
COMPLETE CONNECTOR KIT - 330 pieces covering AWG 22-10 in 4 vibrant colors for instant size recognition
ADVANCED HEAT SHRINK TECH - 3:1 shrink ratio tubing with flame-retardant, high tensile strength for durable, damage-resistant crimps
WATERPROOF WEATHERPROOF - Hot melt adhesive inner lining guarantees a secure, waterproof seal—perfect for marine and automotive use
CERTIFIED QUALITY ASSURANCE - Meets ROHS, ISO 9001, SGS, and CE standards for professional-grade performance and peace of mind

The Haisstronica 330PCS Heat Shrink Butt Connectors kit offers a comprehensive, professional-grade solution for electrical splicing. Featuring a thick copper core and high-quality polyolefin heat shrink tubing with a 3:1 shrink ratio, these connectors provide waterproof, flame-retardant, and mechanically robust crimps. Color-coded and sized for quick identification, this kit meets all major international standards, making it ideal for automotive, marine, and home electrical projects.

Specifications

ASIN	B07Q3JJRY8
Brand Name	haisstronica
Color	Red,blue,yellow,white
Connector Type	Crimp
Contact Material	Copper
Customer Reviews	4.8 4.8 out of 5 stars (4,745)
Insulation Material Type	Polyolefin
Item Dimensions L x W x H	20L x 20W x 20H millimeters
Manufacturer	haisstronica
Material Type	Copper
Model	HS
Specification Met	CE
Temperature Rating	257 degree fahrenheit
Terminal	Butt Terminal
UPC	192687298006
Unit Count	330 Count

Reviews

M**N

Just as good quality as sold at most stores for a really decent price.

4.04.2026

J**L

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

1.08.2025

A**X

Sehr guter Preis und Qualität

20.10.2025

M**.

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

21.08.2024

N**B

These work a treat, very happy

14.12.2025

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