Southwire 12/3 STW 9" Twist to Lock Adapter with NEMA-15 Plug and L5-20 Receptacle
Southwire 12/3 STW 9" Twist to Lock Adapter with NEMA-15 Plug and L5-20 Receptacle
Hero image 0 of Southwire 12/3 STW 9" Twist to Lock Adapter with NEMA-15 Plug and L5-20 Receptacle, 0 of 3
Southwire

Southwire 12/3 STW 9" Twist to Lock Adapter with NEMA-15 Plug and L5-20 Receptacle

|13 ratings

Smart summary

Generated by AI
  • Powers Locking Tools

    Powers Locking Tools

    Converts a standard 15-amp grounded outlet to accept 20-amp twist-lock plugs.
  • Won't Pull Apart

    Won't Pull Apart

    Twist-lock connection keeps your power cords securely connected during active use.
  • Withstands Tough Job Sites

    Withstands Tough Job Sites

    Weatherproof, sun-resistant, impact-resistant for tough job sites.
  • Easy To Spot

    Easy To Spot

    Bright yellow jacket increases visibility to help prevent tripping accidents on site.
  • Easy To Pack

    Easy To Pack

    Compact nine-inch length fits easily into toolboxes without taking up excess space.

Specifications

  • 12/3 STW adapter
  • 9 in length
  • NEMA 5-15P plug
  • NEMA L5-20R receptacle
  • 15 amp grounded plug connection
  • 20 amp twist-lock receptacle
  • Yellow jacket
  • For compatible generator and jobsite applications
Current price is $14.98
Prices may vary in club and online
How do you want your item?

Shipping

Columbus, 43215
Sam's credit card
Limited time! Get a $60 statement credit when you open an account between 10/28-12/2 and use it to make $30 in eligible Sam’s Club purchases within 30 days¹
We also recommend

8500/6300-Watt Armor Power Dual Fuel Inverter Generator With Remote Start and Telescopic Handle and Wheels $999.00

8500/6300-Watt Armor Power Dual Fuel Inverter Generator With Remote Start and Telescopic Handle and Wheels
current price $999.00

8500/6300-Watt Armor Power Dual Fuel Inverter Generator With Remote Start and Telescopic Handle and Wheels

Sponsored

About this item

Product details

Southwire 12/3 STW 9" Twist to Lock Adapter with NEMA-15 Plug and L5-20 Receptacle is a practical generator extension cord adapter: this generator adapter cord converts a standard 15-amp grounded receptacle to a 20-amp receptacle with a quick twist. Rugged generator cord adapter: the jacket of the generator extension cord adapter protects it from the elements and sun exposure the molded connectors are made of impact-resistant material, so this generator adapter cord is great for industrial contractor grade generator cord adapter: suitable for rugged industrial applications such as operating circular saw, heater and table saw. Easy-to-use generator power cord adapter: simply twist the 15a U-ground plug to lock into the 20a receptacle lets you convert any plug quickly the bright yellow jacket of the generator cord adapter increases visibility to minimize tripping incidents.
info:
If the item details above aren't accurate or complete, we want to know about it. 

Key specifications

Specifications

  • 12/3 STW adapter
  • 9 in length
  • NEMA 5-15P plug
  • NEMA L5-20R receptacle
  • 15 amp grounded plug connection
  • 20 amp twist-lock receptacle
  • Yellow jacket
  • For compatible generator and jobsite applications

Member ratings & reviews

4.6 out of 5 stars
stars
13 ratings13 reviews
Write a review
  1. 5 stars85% (11)
  2. 4 stars0% (0)
  3. 3 stars8% (1)
  4. 2 stars8% (1)
  5. 1 star0% (0)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 13 reviews

Sep 18, 2026
Reviewer name: Dawn
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

[This review was collected as part of a promotion.] works as intended. worked well with our generator

Review from walmart.com
Helpful?3TST0GX2HLRT20883068238
Mar 20, 2026
Reviewer name: Arnav
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Works well

[This review was collected as part of a promotion.] Works well for plugging 20amp L5-20 into standard 15amp sockets. Don't use this if your circuit cannot support 20amps.

Review from walmart.com
Helpful?3TST0GX2HLRT20883068238
Oct 10, 2026
Reviewer name: AprilS
5 out of 5 stars
5 out of 5 stars review

Adapter is safer

[This review was collected as part of a promotion.] I have a Genimax generator and this generator adapter is going to work perfectly this winter. It's a safer way when using my generator so I am excited to use this when it's needed. We tend to loose power a lot in the winter months due to snow and ice storms.

Review from southwiretools.com
Helpful?3TST0GX2HLRT20883068238
Current price is $14.98
Prices may vary in club and online
How do you want your item?

Shipping

Columbus, 43215