---
product_id: 23239595
title: "Sigma Engineered Solutions ProConnex C-550 AC/MC Connector 3/8\" Gray, 100-Pack"
brand: "sigma electric"
price: "฿4857"
currency: THB
in_stock: true
reviews_count: 11
url: https://www.desertcart.co.th/products/23239595-sigma-engineered-solutions-proconnex-c-550-ac-mc-connector-3
store_origin: TH
region: Thailand
---

# Terminates AC/MC cULus listed Tri-combo screw Sigma Engineered Solutions ProConnex C-550 AC/MC Connector 3/8" Gray, 100-Pack

**Brand:** sigma electric
**Price:** ฿4857
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with Confidence: Elevate your electrical game!

## Quick Answers

- **What is this?** Sigma Engineered Solutions ProConnex C-550 AC/MC Connector 3/8" Gray, 100-Pack by sigma electric
- **How much does it cost?** ฿4857 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/23239595-sigma-engineered-solutions-proconnex-c-550-ac-mc-connector-3)

## Best For

- sigma electric enthusiasts

## Why This Product

- Trusted sigma electric brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **📦 Bulk Value:** 100-pack ensures you’re always prepared for any job.
- • **✅ Trusted Safety:** cULus listed for peace of mind in your electrical projects.
- • **🛠️ Durable Design:** Crafted from robust zinc die-cast construction for long-lasting performance.
- • **🔌 Seamless Connectivity:** Effortlessly terminates AC or MC to a 1/2-in knockout.
- • **🔧 Versatile Compatibility:** Designed for aluminum or steel 14/2 - 10/3 AC or MC wiring.

## Overview

The Sigma Electric ProConnex C-550 AC/MC Connector is a reliable solution for terminating AC or MC to a 1/2-inch knockout. Suitable for both aluminum and steel wiring sizes 14/2 to 10/3, this connector features a tri-combo screw for versatile installation and is made from durable zinc die-cast material. With cULus listing, it guarantees safety and compliance, making it an essential addition to any professional toolkit.

## Description

Sigma Engineered Solutions ProConnex C-550 AC/MC Connector 3/8" Gray, 100-Pack

## Features

- Terminates AC or MC to a 1/2-in knockout
- For aluminum or steel 14/2 - 10/3 AC or MC
- Tri-combo screw included
- Zinc die-cast construction
- Product is cULus listed

## Images

![Sigma Engineered Solutions ProConnex C-550 AC/MC Connector 3/8" Gray, 100-Pack - Image 1](https://m.media-amazon.com/images/I/712sLsu1u-L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Great item
  

*by S***L on Reviewed in the United States 🇺🇸 on November 20, 2022*

Great price for the quantity.

### ⭐⭐⭐⭐ 







  
  
    Works well but not perfect
  

*by P***G on Reviewed in the United States 🇺🇸 on October 6, 2022*

These connectors work as intended and keeps the cable secured in junction box.  Competitively priced for bulk quantities.  Several did not have any screws.  Mostly used for 14/2 and 14/3 MC cables in my application and felt the clearance hole was a bit too big and sometimes the screw would grab the edge of the armored sheathing instead of the center so you just got to pay attention.  12/2 and 12/3 definitely fits better even with the plastic bushings installed.  The screws were tight so just work them beforehand prior to installation.

### ⭐⭐⭐⭐⭐ 







  
  
    Exact fit
  

*by A***R on Reviewed in the United States 🇺🇸 on October 5, 2022*

Exactly as described

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**Shop now:** [https://www.desertcart.co.th/products/23239595-sigma-engineered-solutions-proconnex-c-550-ac-mc-connector-3](https://www.desertcart.co.th/products/23239595-sigma-engineered-solutions-proconnex-c-550-ac-mc-connector-3)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-27*