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-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 & flame-retardant seal

🔥Heat shrink tubing with 3:1 shrink ratio

🔧330PCS assorted sizes/colors

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$87.91

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Seal the deal with connectors that never quit! 💧

EASY IDENTIFICATION - Color-coded tubing with clear gauge markings for quick, error-free selection
PREMIUM COPPER CORE - Thicker copper core ensures safer, more reliable electrical connections
BUILT TO LAST COMPLY - Flame-retardant, underground-safe, and certified to ROHS, ISO, SGS, and CE standards
NEXT LEVEL WATERPROOFING - Heat-activated adhesive lining guarantees a 100% waterproof, slip-proof seal
COMPLETE KIT FOR EVERY JOB - 330 connectors in 4 sizes and colors to fit any wire gauge from 22-10 AWG

The Haisstronica 330PCS Heat Shrink Butt Connectors set offers a professional-grade solution for electrical, automotive, marine, and home projects. Featuring a thick copper core and high-strength polyolefin heat shrink tubing with a 3:1 shrink ratio, these connectors provide a waterproof, flame-retardant, and mechanically durable splice. Color-coded and compliant with major international standards, this kit ensures fast, reliable, and safe wire connections across multiple wire gauges.

Specifications

ASIN	B07Q3JJRY8
Brand Name	haisstronica
Color	Red,blue,yellow,white
Colour	Red,blue,yellow,white
Connector Gender	Male
Connector Type	Crimp
Connector type	Crimp
Contact Material	Copper
Contact material	Copper
Customer Reviews	4.8 out of 5 stars 4,797 Reviews
Insulation Material Type	Polyolefin
Insulation material	Polyolefin
Item Dimensions L x W x H	20L x 20W x 20H millimeters
Manufacturer	haisstronica
Material	Copper
Material Type	Copper
Model	HS
Number of Items	330
Part Number	HX1045
Specification Met	CE
Temperature Rating	257 degree fahrenheit
Terminal	Butt Terminal
UPC	192687298006
Unit Count	330 Count

Reviews

R**O

Buen producto

Todo es correcto

24.01.2025

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**.

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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