Klein Tools 86939 Hex Key Adap...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$68.94
$18.94
Klein Tools 86939 Hex Key Adapter for Refrigeration Wrench

Klein Tools 86939 Hex Key Adapter for Refrigeration Wrench

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Model: 86939
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$68.94
$18.94
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Hex Key Adapter for Refrigeration Wrench

  • Features

    • Black oxide coating
    • Fits with Klein Refrigeration Wrenches 86938 and 68310 for easy ratcheting action
    • Spring Loaded
    • Adapter fits 1/4-Inch square wrench opening
    • Spring loaded ball bearing locks securely into wrench
    • Made in USA
    • Hex Key provides access to 3/16-Inch and 5/16-Inch hard to reach valves
    • Perfect for heating, AC, and refrigeration applications


86939 - spec sheet

Manufacturer Resources

Product Specs

Connector Type:
Spring Loaded Ball Bearing
Hex Size:
3/16" and 5/16"
Measurement Standard:
SAE
Overall Length:
2.125" (5.4 cm)
Shank Size:
0.25" (0.6 cm)
Shank Type:
Square
Department:
Electrical
Product Group:
Hand Tools
Product Subgroup:
Hammers & Wrenches
Product Type:
Adapter for Refrigeration Wrench used in HVAC
Product Finish:
Black Oxide
Product Details:
Adapter for Refrigeration Wrench used in HVAC
Product Diameter:
0.313" (0.8 cm)
Product Height:
0.2350 in
Product Material:
Steel
Product Weight:
0.3800 lbs
Product Width:
0.3550 in
Product Depth:
2.1200 in

Klein Tools 86939 – Frequently Asked Questions

1) What does the Klein 86939 hex key adapter fit onto?
The 86939 adapter drops into a 1/4 inch square wrench opening, and Klein states it works with the 86938 and 68310 refrigeration wrenches for ratcheting action. Its shank is a 0.25 inch square, so the wrench you put it in has to have that square drive opening.
2) What size hex valves will the Klein 86939 turn?
Two sizes, 3/16 inch and 5/16 inch, which are the common service valve stems on HVAC and refrigeration equipment. Sizes are SAE, not metric, so a metric stem is the wrong job for this adapter.
3) Do I still need a refrigeration wrench if I buy the Klein 86939?
Yes. The 86939 is an adapter only, not a standalone tool. It has no handle: you drive it with a refrigeration wrench, and Klein pairs it with the 86938 and 68310. Buy the wrench alongside it if you don't already own one.
4) Does the Klein 86939 adapter stay put in the wrench or fall out when you're working overhead?
It locks in. The connection is a spring loaded ball bearing that seats in the wrench's square opening and holds until you pull it out, so it isn't going to drop off the wrench while you're reaching into a condenser cabinet.
5) How much does the Klein 86939 hex adapter stick out past the wrench?
Overall length is 2.125 inches (5.4 cm) with a 0.313 inch (0.8 cm) diameter body. That short stack is what lets it get onto valves in tight cabinets, but it also means it is not a reach extension. If the valve sits deep behind other piping, you want a longer extension rather than this adapter.
6) Will the Klein 86939 adapter rust up in a service van or on a rooftop unit?
It's steel with a black oxide finish. Black oxide gives mild corrosion resistance and cuts glare, but it is not stainless, so wipe it down after wet work and keep it out of standing water in the bottom of a tool bag.
How fast can I get the Klein Tools 86939 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools 86939 come with a warranty?
Absolutely. The Klein Tools 86939 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools 86939?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools 86939 from ZenSupply?
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