---
product_id: 386500816
title: "Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R"
brand: "klein tools"
price: "฿2828"
currency: THB
in_stock: true
reviews_count: 5
category: "Klein Tools"
url: https://www.desertcart.co.th/products/386500816-klein-tools-86939-hex-adapter-for-1-4-inch-square
store_origin: TH
region: Thailand
---

# 1/4-Inch square wrench fit Spring-loaded ball bearing lock Dual 3/16 & 5/16-Inch hex access Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R

**Brand:** klein tools
**Price:** ฿2828
**Availability:** ✅ In Stock

## Summary

> 🔩 Unlock hard-to-reach HVAC valves with precision and confidence!

## Quick Answers

- **What is this?** Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R by klein tools
- **How much does it cost?** ฿2828 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/386500816-klein-tools-86939-hex-adapter-for-1-4-inch-square)

## Best For

- klein tools enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** At just 2.13 inches and 0.7 ounces, it’s the perfect pocket-sized tool for on-the-go technicians.
- • **Made in the USA Legacy:** Backed by Klein Tools’ 160+ years of professional-grade craftsmanship and reliability.
- • **Durability You Can Trust:** Crafted from premium alloy steel with a black oxide finish for corrosion resistance and long-lasting performance.
- • **Secure Locking Mechanism:** Spring-loaded ball bearing ensures a rock-solid connection—no slips, no frustration.
- • **Precision Fit for HVAC Pros:** Seamlessly adapts 1/4-Inch square wrench to hard-to-reach 3/16 and 5/16-Inch hex valves.

## Overview

The Klein Tools 86939 Hex Adapter converts any 1/4-Inch square wrench opening into 3/16 and 5/16-Inch hex sizes, ideal for HVAC and refrigeration professionals. Featuring a spring-loaded ball bearing lock for secure attachment, this compact, durable alloy steel adapter offers reliable access to tight valves. Proudly made in the USA, it embodies over 160 years of Klein’s trusted craftsmanship.

## Description

Adapt any 1/4-Inch square wrench opening to 3/16-Inch and 5/16-Inch hex head sizes. This spring loaded ball bearing adapter locks securely into wrench. Fits Klein Refrigeration Wrenches 86938 and 68310 and provides an easy ratcheting action for hard to reach valves. Perfect for heating, AC, and refrigeration applications. Made in the USA. Access 3/16-Inch and 5/16-Inch hard to reach valves. Made-Inch USA adapter fits 1/4-Inch square wrench opening. Locks securely into wrench with spring loaded ball bearing. Made in the USA. Black oxide coating. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Review: It works, and it's perfect for a small tap in the A/C.
Review: Does not fit most suction line valves, too small.

## Features

- Hex Key provides access to 3/16-Inch and 5/16-Inch hard to reach valves
- Adapter fits 1/4-Inch square wrench opening
- Spring loaded ball bearing locks securely into wrench

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07HFDT6SX |
| ASIN  | B07HFDT6SX |
| Batteries Included? | No |
| Batteries Required? | No |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (117) |
| Customer reviews | 4.5 4.5 out of 5 stars (117) |
| Date First Available | 13 December 2018 |
| Date First Available  | 13 December 2018 |
| Finish | Powder Coated |
| Head Style | Fixed Square |
| Included components | Tools & Accessories |
| Item Package Quantity | 1 |
| Item Weight | 19.8 g |
| Item model number | 86939 |
| Item model number  | 86939 |
| Manufacturer | KLEIN TOOLS |
| Manufacturer  | KLEIN TOOLS |
| Material | Alloy Steel |
| Part number | 86939 |
| Product Dimensions | 5.38 x 0.91 x 0.61 cm; 19.84 g |
| Product Dimensions  | 5.38 x 0.91 x 0.61 cm; 19.84 g |
| Special Features | Spring Loaded |
| Style | Adapter for Refrigeration Wrench used in HVAC |

## Product Details

- **Brand:** KLEIN TOOLS
- **Colour:** Black
- **Item length:** 2.13 Inches
- **Item weight:** 0.7 Ounces
- **Material:** Alloy Steel

## Images

![Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R - Image 1](https://m.media-amazon.com/images/I/31WUqTHFrLL.jpg)
![Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R - Image 2](https://m.media-amazon.com/images/I/31SIXndJN5L.jpg)
![Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R - Image 3](https://m.media-amazon.com/images/I/41VHMcrmFVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by I***M on 4 November 2025*

It works, and it's perfect for a small tap in the A/C.

### ⭐⭐ Review
*by T***H on 8 November 2023*

Does not fit most suction line valves, too small.

### ⭐⭐⭐⭐⭐ Review
*by T***K on 26 August 2025*

One of the only bits I can find that’s worthwhile and fits the 454B spots. It holds up well and almost feels like an allen wrench. Definitely worth it.

## Frequently Bought Together

- Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R
- Klein Tools 68310 Ratcheting Refrigeration Wrench, Made in USA, Reversible Wrench with 3/16 and 5/16-Inch Square and 1/4 and 3/8-Inch Square Sizes
- Ridgid - CC247 RIDGID 40617 Model 101 Close Quarters Tubing Cutter, 1/4-inch to 1-1/8-inch Tube Cutter Silver

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-24*