---
product_id: 320761049
title: "Stanley J5120 Proto 3/8-Inch Drive Torque Adapter 5/8-Inch"
brand: "proto"
price: "€ 39.28"
currency: EUR
in_stock: true
reviews_count: 5
category: "Proto"
url: https://www.desertcart.sk/products/320761049-stanley-j5120-proto-3-8-inch-drive-torque-adapter-5
store_origin: SK
region: Slovakia
---

# Durable Alloy Steel Torque Calibration Proudly Made in USA Stanley J5120 Proto 3/8-Inch Drive Torque Adapter 5/8-Inch

**Brand:** proto
**Price:** € 39.28
**Availability:** ✅ In Stock

## Summary

> 🔧 Torque Your Way to Perfection!

## Quick Answers

- **What is this?** Stanley J5120 Proto 3/8-Inch Drive Torque Adapter 5/8-Inch by proto
- **How much does it cost?** € 39.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/320761049-stanley-j5120-proto-3-8-inch-drive-torque-adapter-5)

## Best For

- proto enthusiasts

## Why This Product

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

## Key Features

- • **Trusted Brand:** Stanley Proto - a name synonymous with quality and reliability.
- • **Compact Design:** Measuring just 2 inches, it's perfect for tight spaces.
- • **Robust Construction:** Crafted from heat-treated alloy steel for unmatched durability.
- • **Precision Engineering:** Achieve flawless torque calibrations effortlessly.
- • **Lightweight Performance:** Weighing only 45.4g, it’s easy to handle without sacrificing strength.

## Overview

The ProtoStanley J5120 3/8" Drive Torque Adapter is engineered for precision torque calibrations, featuring a compact design and robust heat-treated alloy steel construction. Weighing just 45.4g, this adapter is both lightweight and durable, making it an essential tool for professionals. Proudly made in the USA, it embodies quality and reliability that you can trust.

## Description

Proto torque adapters are designed with a center-to-center dimension of 2". This means that the distance from the center of the square drive of the mating torque wrench to the center of the fasteners is exactly 2". This constant dimension serves to simplify the process of calculating the torque applied. The box end wall thickness is specially engineered to provide strength while still allowing ample room for access to reach difficult fasteners.

Review: Extension - Good quality. I used this for extension for use with a torque wrench.
Review: Good fit for 16mm bolts - This is a high quality piece of kit. Perfect for tightening the camshaft bolts on BMW LC boxer twins. The 5/8" size fits 16mm bolts.

## Features

- Designed for easy torque calibrations
- Adapters measure 2'' from the center of the square drive to the center of the adapter opening
- Special heat-treated alloy steel helps to increase strength and durability
- Designed for easy torque calibrations.
- Adapters measure 2'' from the center of the square drive to the center of the adapter opening.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001HWEAEW |
| Brand | Proto |
| Brand Name | Proto |
| Color | Multi |
| Colour | Multi |
| Customer Reviews | 4.6 out of 5 stars 93 Reviews |
| Finish Types | Polished |
| Global Trade Identification Number | 00662679164607 |
| Head Style | Fixed Square |
| Item Length | 1.6 Centimeters |
| Item Weight | 45 g |
| Item length | 1.6 Centimeters |
| Item package quantity | 1 |
| Item weight | 45 g |
| Manufacturer | Stanley Proto J5120 3/8-Inch Drive Torque Adapter 5/8-Inch |
| Manufacturer Part Number | J5120 |
| Material | Blend |
| Material Type | Blend |
| Model Number | J5120 |
| Number of Items | 1 |
| Package Quantity | 1 |
| UPC | 662679164607 |
| Unit Count | 1 Count |

## Product Details

- **Color:** Multi
- **Brand:** Proto
- **Material:** Blend
- **Item Package Quantity:** 1
- **Head Style:** Fixed Square

## Images

![Stanley J5120 Proto 3/8-Inch Drive Torque Adapter 5/8-Inch - Image 1](https://m.media-amazon.com/images/I/51hnn3nJXxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Extension
*by B***K on 8 December 2025*

Good quality. I used this for extension for use with a torque wrench.

### ⭐⭐⭐⭐⭐ Good fit for 16mm bolts
*by R***E on 2 October 2025*

This is a high quality piece of kit. Perfect for tightening the camshaft bolts on BMW LC boxer twins. The 5/8" size fits 16mm bolts.

### ⭐⭐⭐⭐⭐ This worked well
*by J***F on 29 March 2024*

The wrench got back in the place I needed it to. I just wish they would have sent literature that tells you how much to reduce your torque wrench.

## Frequently Bought Together

- Stanley Proto J5120 3/8" Drive Torque Adapter 5/8"
- Stanley Proto J5118 3/8" Drive Torque Adapter 9/16"
- 3/8" Drive Torque Adapter 11/16"

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**Shop now:** [https://www.desertcart.sk/products/320761049-stanley-j5120-proto-3-8-inch-drive-torque-adapter-5](https://www.desertcart.sk/products/320761049-stanley-j5120-proto-3-8-inch-drive-torque-adapter-5)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-09-08*