---
product_id: 95616140
title: "Klein Tools 86939 Hex Adapter, Made in USA, for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R"
brand: "klein tools"
price: "€ 43.80"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/95616140-klein-tools-86939-hex-adapter-made-in-usa-for-1
store_origin: HR
region: Croatia
---

# 1/4" square to 3/16 & 5/16" hex adapter Spring-loaded ball bearing lock Made in USA, premium alloy steel Klein Tools 86939 Hex Adapter, Made in USA, for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R

**Brand:** klein tools
**Price:** € 43.80
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Klein Tools 86939 Hex Adapter, Made in USA, 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?** € 43.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/95616140-klein-tools-86939-hex-adapter-made-in-usa-for-1)

## 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

- • **Proudly Made in the USA:** Backed by over 160 years of Klein Tools’ heritage—quality and reliability that professionals swear by.
- • **Durability You Can Trust:** Crafted from premium alloy steel with a black oxide finish to resist wear and corrosion on the job.
- • **Secure Locking Mechanism:** Spring-loaded ball bearing ensures your adapter stays locked in place—no slips, no frustration.
- • **Precision Fit for HVAC Pros:** Seamlessly adapts 1/4" square wrench to hard-to-reach 3/16" & 5/16" hex valves for ultimate control.
- • **Effortless Ratcheting Action:** Designed to pair perfectly with Klein Refrigeration Wrenches 86938 & 68310 for smooth, efficient valve access.

## Overview

The Klein Tools 86939 Hex Adapter converts a 1/4-inch square wrench opening to 3/16 and 5/16-inch hex sizes, featuring a spring-loaded ball bearing lock for secure fit and smooth ratcheting. Made from durable alloy steel with a black oxide finish, it’s engineered for HVAC, refrigeration, and AC professionals who demand reliable, American-made tools.

## Description

Klein Tools 86939 Hex Adapter, Made in USA, for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R

## 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
- Fits with Klein Refrigeration Wrenches 86938 and 68310 for easy ratcheting action
- Made in USA
- Perfect for heating, AC, and refrigeration applications
- Black oxide coating

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Black |
| Brand | KLEIN TOOLS |
| Material | Alloy Steel |
| Item Length | 2.13 Inches |
| Item Weight | 0.7 Ounces |
| Item Package Quantity | 1 |
| Head Style | Box End, Fixed Square |
| Finish Type | Brushed |
| Operation Mode | Mechanical |
| Is Racheting | Yes |
| Is Non Sparking | Yes |
| End Style | hang hole |
| Manufacturer | Klein Tools |
| Wrench Length Style | standard |
| UPC | 092644692390 |
| Global Trade Identification Number | 00092644692390 |
| Part Number | 86939 |
| Item Weight | 0.7 ounces |
| Item model number | 86939 |
| Size | 0.25'' (0.6 cm) |
| Style | Adapter for Refrigeration Wrench used in HVAC |
| Finish | Brushed |
| Pattern | Solid |
| Shape | Rectangular |
| Power Source | hand_powered |
| Measurement System | inch |
| Special Features | Spring Loaded |
| Included Components | Hex Key Adapter for Refrigeration Wrench |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | 1 Year Manufacturer |

## Product Details

- **Color:** Black
- **Brand:** KLEIN TOOLS
- **Material:** Alloy Steel
- **Item Length:** 2.13 Inches
- **Item Weight:** 0.7 Ounces

## Images

![Klein Tools 86939 Hex Adapter, Made in USA, 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, Made in USA, 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, Made in USA, 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)

## 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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**Shop now:** [https://www.desertcart.hr/products/95616140-klein-tools-86939-hex-adapter-made-in-usa-for-1](https://www.desertcart.hr/products/95616140-klein-tools-86939-hex-adapter-made-in-usa-for-1)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-26*