What is the voltage rating for these connectors? can they be used for 120v ac household wiring?

Voltage for these connectors are less important than the current going through them. They are designed to to far exceed the max current rating for the wires they are connecting. I work on boats and use them regularly for 120 vac and 12&24 vdc. I do not recommend using them on household wire. They are designed to connect stranded wire and although they will crimp to a solid core wire common for houses the industry standard in houses is to use wire nuts. Also most building codes (for both boats and houses) require all connections for ac wiring to be in a mounted box or isolated in some way. A butt connector doesn't count.

What is a good crimper for these?

The best crimper to use has groves on one side and studs on the opposite side. When you crimp the connector the stud compresses into a the connector and makes a 100 % connection. Also you only need to strip a quarter inch of insulation off the wire.

I really like the product. But this plastic case is already breaking at the hindges then I will have all of these connectors in a bag....

Home Depot sells a nice plastic box for around $10 that works great.

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Heat Shrink Wire Connectors

Product ID: 176312980

Details

Color
Red Blue
Connector Type
Crimp
Contact Material
Copper
Insulation Material
Polyethylene
Terminal
Spade Ring

🎨Color-coded for fast gauge ID

💧360° waterproof heat shrink seal

🔒Secure one-piece tinned copper barrel

¥347

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Description

⚡ Seal the deal with connectors that never quit!

UNBREAKABLE BOND - Tinned copper barrels lock wires with minimal voltage drop for flawless current flow.
PRECISION FIT GUIDE - Color-coded terminals and stud size compatibility (#10 to 3/8”) streamline installation and reduce errors.
WEATHERPROOF WARRIOR - Dual-wall heat shrink with adhesive creates a 360° moisture barrier—perfect for marine and outdoor use.
ALL IN ONE ASSORTMENT - 250 connectors covering AWG 22-10 with ring, fork, spade, butt, and quick disconnects—ready for any job.
MARINE GRADE DURABILITY - Engineered to resist salt spray, heat, and moisture, ensuring long-lasting, corrosion-free connections.

The TICONN 250 Pcs Heat Shrink Wire Connectors kit offers a comprehensive, marine-grade solution with corrosion-resistant tinned copper barrels and a 3:1 heat shrink ratio that forms a waterproof 360° seal. Designed for AWG 22-10 wires, this color-coded assortment includes ring, fork, spade, butt, and quick disconnect terminals, ensuring secure, durable electrical connections in automotive, marine, and outdoor environments.

Specifications

ASIN	B07ZPF1TTX
Best Sellers Rank	#575 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Circular Connectors
Date First Available	October 28, 2019
Item Weight	15.5 ounces
Item model number	TICONN 250Pcs
Manufacturer	TICONN
Product Dimensions	7.7 x 5.4 x 1.7 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥347

Duties & taxes included

In stock

Sold byAmazon ChinaDelivered 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 China.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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