--- title: Calibration Hex Step Adapters – FAQ & User Guide description: Learn about Mountz Calibration Hex Step Adapters for testing open-ended wrenches, including American and metric sizes, square drives, torque capacities, and model selection. --- - Chat - [Contact Us](https://go.mountztorque.com/contact-us?_gl=1*1t1uhd0*_gcl_au*MjMwOTIyMTI2LjE2ODU1OTU4Mjc.&_ga=2.126080644.843342068.1685595827-2758410.1685595827&hsLang=en-us) - [Sign in](https://www.mountztorque.com/secure/checkout.ssp?is=login&login=T&fragment=login-register&hsLang=en-us) - [![mountztorque](https://mountztorque.com/hubfs/MO18001_Logo_H_Color_Tag_RGB.svg)](https://www.mountztorque.com/?hsLang=en) - North America:[(408) 850-9978](tel:4088509978) - International:[+44 1428 741756](tel:441428741756) - [Shop Products](https://www.mountztorque.com/Product-Type) - [Learning Center](https://www.mountztorque.com/Learning-Center) - [About Us](https://www.mountztorque.com/about-us) - [Service and Calibration](https://go.mountztorque.com/usa-service?_gl=1*1itcg2n*_gcl_au*MjMwOTIyMTI2LjE2ODU1OTU4Mjc.&_ga=2.172874026.843342068.1685595827-2758410.1685595827) [![Mountz\_Assets\_ConversionCalculator\_white](https://mountztorque.com/hubfs/Mountz_Assets_ConversionCalculator_white.svg) Conversion Calculator](https://www.mountztorque.com/torque-conversion-calculator?hsLang=en) [![Mountz\_Assets\_TorqueToolFinder\_white](https://mountztorque.com/hubfs/Mountz_Assets_TorqueToolFinder_white.svg) Torque Tool Finder](https://www.mountztorque.com/torque-conversion-calculator?hsLang=en) [Skip to content](https://mountztorque.com/en-us/knowledge-base/calibration-hex-step-adapters-faq#main-content) English - United States Show submenu for translations ![vast.png](https://mountztorque.com/hs-fs/hubfs/Mountz%20Logo%20-%20HS.png?width=413&height=135&name=Mountz%20Logo%20-%20HS.png) - [Sample Contact Page](https://5139817.hs-sites.com/sample-contact) - [Sample About Page](https://5139817.hs-sites.com/sample-about) - [Default HubSpot Blog](https://mountztorque-5139817.hs-sites.com/blog) Open main navigation Close main navigation - [Sample Contact Page](https://5139817.hs-sites.com/sample-contact) - [Sample About Page](https://5139817.hs-sites.com/sample-about) - [Default HubSpot Blog](https://mountztorque-5139817.hs-sites.com/blog) - English - United States Show submenu for translations - Contact us Contact us How can we help you? - There are no suggestions because the search field is empty. 1. [Mountz Torque Knowledge Base](https://mountztorque.com/en-us/knowledge-base?hsLang=en-us) 2. [Product Overviews](https://mountztorque.com/en-us/knowledge-base/product-overviews?hsLang=en-us) 3. [Calibration Equipment](https://mountztorque.com/en-us/knowledge-base/product-overviews?hsLang=en-us#calibration-equipment) # Calibration Hex Step Adapters – FAQ & User Guide ## Mountz Calibration Hex Step Adapters are designed to make it easy and convenient to test a standard range of open-ended wrenches. Each adapter provides four hex size options, allowing multiple wrench sizes to be tested with a single adapter. American and metric models are available with 1/4-inch and 3/8-inch square drives. ### Quick Answer Mountz Calibration Hex Step Adapters are used when testing open-ended wrenches. Each adapter features four hex dimensions, providing multiple wrench sizes on a single adapter to help make the wrench calibration process simple and efficient. Models are available in American and metric sizes with either a 1/4-inch or 3/8-inch square drive. --- ### What Is a Calibration Hex Step Adapter Used For? Calibration Hex Step Adapters are designed for testing a **standard range of open-ended wrenches**. The stepped design provides **four different hex sizes on a single adapter**, allowing the appropriate section of the adapter to be matched to the wrench being tested. Mountz identifies the four-size design as a way to increase productivity and improve the wrench calibration process. --- ### How Does a Hex Step Adapter Work? Each adapter contains four hex dimensions, identified as **A, B, C, and D**. The appropriate hex dimension is selected based on the size of the open-ended wrench being tested. The adapter's square drive connects it to compatible calibration or torque measurement equipment. The available configurations provide: - Four hex sizes per adapter - American or metric sizing - 1/4-inch or 3/8-inch square drive - Multiple adapters for covering different wrench sizes --- ### Available 1/4-Inch Square Drive Models All 1/4-inch square drive models have a maximum torque capacity of **30 N·m**. | Size Type | Item # | A | B | C | D | Max Torque | | --- | --- | --- | --- | --- | --- | --- | | American | 061500 | 3/4" | 11/16" | 5/8" | 9/16" | 30 N·m | | American | 061501 | 5/16" | 3/8" | 7/16" | 1/2" | 30 N·m | | American | 061527 | 1/2" | 3/8" | 1/4" | 1/8" | 30 N·m | | American | 061630 | 1/4" | 7/32" | 3/16" | 5/32" | 30 N·m | | American | 061502 | 1/4" | 7/32" | 3/16" | 1/8" | 30 N·m | | Metric | 061503 | 19 mm | 17 mm | 16 mm | 14 mm | 30 N·m | | Metric | 061504 | 13 mm | 12 mm | 11 mm | 10 mm | 30 N·m | | Metric | 061505 | 9 mm | 8 mm | 7 mm | 6 mm | 30 N·m | | Metric | 061529 | 9 mm | 7 mm | 5 mm | 3 mm | 30 N·m | | Metric | 061528 | 8 mm | 6 mm | 4 mm | 2 mm | 30 N·m | | Metric | 061506 | 5.5 mm | 5 mm | 4.5 mm | 4 mm | 30 N·m | --- ### Available 3/8-Inch Square Drive Models All 3/8-inch square drive models have a maximum torque capacity of **135 N·m**. | Size Type | Item # | A | B | C | D | Max Torque | | --- | --- | --- | --- | --- | --- | --- | | American | 061559 | 1 1/4" | 1 1/8" | 1 1/16" | 1" | 135 N·m | | American | 061537 | 1" | 7/8" | 3/4" | 5/8" | 135 N·m | | American | 061524 | 3/4" | 11/16" | 5/8" | 9/16" | 135 N·m | | American | 061531 | 9/16" | 7/16" | 5/16" | 3/16" | 135 N·m | | American | 061525 | 1/2" | 7/16" | 3/8" | 5/16" | 135 N·m | | American | 061530 | 1/4" | 7/32" | 3/16" | 1/8" | 135 N·m | | Metric | 061543 | 19 mm | 17 mm | 16 mm | 14 mm | 135 N·m | | Metric | 061542 | 17 mm | 15 mm | 13 mm | 11 mm | 135 N·m | | Metric | 061541 | 16 mm | 14 mm | 13 mm | 10 mm | 135 N·m | | Metric | 061540 | 13 mm | 12 mm | 11 mm | 10 mm | 135 N·m | | Metric | 061539 | 9 mm | 8 mm | 7 mm | 6 mm | 135 N·m | | Metric | 061538 | 5.5 mm | 5 mm | 4.5 mm | 4 mm | 135 N·m | --- ### Selecting a Calibration Hex Step Adapter **When selecting an adapter, consider:** - Open-ended wrench size - American or metric sizing - Required square drive - Maximum torque capacity - Hex dimensions provided by the adapter Choose an adapter that provides the appropriate hex size for the wrench being tested and does not exceed the adapter's maximum torque capacity. --- ### Square Drive Standards **According to the Mountz product data sheet, the square drive meets:** - ASME B107.300-2010 - ISO 6789-1:2017 --- ### Media & Supporting Content ![hexstep-061524\_01.mainview](https://mountztorque.com/hs-fs/hubfs/hexstep-061524_01.mainview.jpg?width=500&height=500&name=hexstep-061524_01.mainview.jpg)                                     - [Calibration Hex Step Adapters Product Page](https://www.mountztorque.com/Product-Type/Torque-Analyzers-and-Sensors/Calibration-Equipment/Calibration-Equipment-Hex-Step-Adapters?hsLang=en-us) - [Calibration Hex Step Adapters Data Sheet](https://www.mountztorque.com/core/media/media.nl?id=9033905&c=456127&h=UhiixBHRo3RHHMGCB-BwV1aL5uAlSJ23y2LF1sR8Aw0Cuqx2&hsLang=en-us) --- ### Related Content - 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