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XS Power 3/8" Stud Adapters

Pair of 12-volt battery terminal adapters for marine applications (model PN 590)

Item # 122590

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Item # 122590

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About the XS Power 3/8" Stud Adapters

If you're using an XS Power battery in your boat, you might need stud adapters to connect your boat's electrical system to the battery. These PN 590 brass adapters fit 3/8" applications found on many boats. They feature M6 threads and come with stainless steel wingnuts that are built to last. These posts work with most XS Power 12-volt deep-cycle batteries, and you can also use them with XS Power's exclusive i-BAR battery fit system. Warranty: 1 year.

What's in the box:

  • Two 3/8" brass stud adaptors
  • Two 3/8" steel wing-nuts
MFR #590

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XS Power 3/8" Stud Adapters

Philip from Huntingtown, MD on 11/9/2017

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Used on a Braille battery to give me a stud to slide my stock GM side post terminals on (once I removed the stock bolts). Works great.



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More details on the XS Power 3/8" Stud Adapters

Mark G.

Product Research


Overview: The XS Power 3/8" stud adapters have an M6 threaded side, that fits most XS Power batteries, and a 3/8" threaded post for adding power wires. This size is commonly found in marine applications. The threaded stud adapters are made of brass and the wing-nuts are stainless steel.


  • Post Size for Battery: M6 x 3/8" long
  • Post Size for Wires: 3/8" diameter x 3/4" long
  • Wing-nuts: 3/8" Stainless steel

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Customer Q&A

Crutchfield asked: Why did you buy this?
This is the only brass M6 to 3/8" stud adapter that I've been able to find, and combined with Crutchfield's service, it's an obvious choice. They're a little pricey, though, for what they are. [ JONATHAN  Jan 19, 2017 ]

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