Step Down Butt Splices

Connect 2 Different Wire Gauges In One Step

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What's special about these step down butt splices?

  • Allows you to connect 2 different wire gauges in one connector
  • Color coded using the American Wire Gauge’s standard colors for easy installation and identification
  • Available insulated or uninsulated to suit your application
  • Click for More Features

These step-down butt connectors are available in insulated or non-insulated versions to provide a splicing solution for any application. These unique connectors allow you to connect wires of 2 different gauges to each other smoothly and get a reliable connection. Each connection is color coded on its ends using standard AWG colors for easy identification and to avoid errors during installation.


Uninsulated Step Down Butt Connector
NSPA-ML56-20-BP 50 18-20 to 22-24 0.18 lb -
NSPA-ML56-16-BP 50 14-16 to 18-20 0.20 lb -
NSPA-ML56-14-BP 50 10-12 to 14-16 0.23 lb -
NSPA-ML56-10-BP 50 8 to 10-12 0.25 lb -
Vinyl Insulated Step Down Butt Connector
NSPA-WTV-56-20 50 18-20 to 22-24 0.27 lb Red
NSPA-WTV-56-16 50 14-16 to 18-20 0.34 lb Blue
NSPA-WTV-56-14 50 10-12 to 14-16 0.42 lb Yellow
NSPA-WTV-56-10 50 8 to 10-12 0.53 lb Pink
Krimpa Seal Step Down Butt Connector
NSPA-KS56-20 50 18-20 to 22-24 0.27 lb Red
NSPA-KS56-16 50 14-16 to 18-20 0.34 lb Blue
NSPA-KS56-14 50 10-12 to 14-16 0.42 lb Yellow
NSPA-KS56-10 50 8 to 10-12 0.53 lb Pink
MultiLink Step Down Butt Connector
NSPA-ML56-20 50 18-20 to 22-24 0.27 lb Red
NSPA-ML56-16 50 14-16 to 18-20 0.34 lb Blue
NSPA-ML56-14 50 10-12 to 14-16 0.42 lb Yellow
NSPA-ML56-10 50 8 to 10-12 0.53 lb Pink
  • Crimp barrels have crimp indicators for a sure crimp every time
  • Equipped with a wire stop to avoid over insertion
  • Butt is seamless so it provides superior crimp performance and strain relief
  • Window in the butt provides visual confirmation of the butt being inserted
  • Butt splice has a uniform copper wall, so positive crimping is uniform on both sides
Heat Shrink Tubing
Material Multiple wall polyolefin tubing with meltable, integral inner wall
Applicable Specifications MIL-I-23053/4, Class 1
AMS 3534
UL File E-157227
Temperature Rating -55°C to 110°C
Tensile Strength 2200 PSI
Longitudinal Change +1, -10%
Recovery Temperature 135°C
Dielectric Strength 900 Volts/Mil
Voltage Rating 600 Volts
Corrosion Resistance Non-Corrosive
Fungus Resistance Non-Nutrient
Water Absorption <0.1%
Solder (if applicable)
Melt Temperature 149°C (300°F)
Applicable Specifications J-STD-006
Solder contains any or all of the following Antimony, Cadmium, Copper, Indium, Silver, Iron, Aluminum, Nickel, Arsenic, Zinc, Bismuth, Gold, Tin, Lead
Flux 1%-3% RMA
Applicable Specifications J-STD-004
Patent Numbers Butt Connectors: US 6,838,621 B2, US 6,677,529 B1






HydraLink Sealed Multiple Wire Closed End and In-Line Butt ConnectorsHydraLink Sealed Multiple Wire Closed End and In-Line Butt Connectors
Unlike traditional methods of joining multiple wires, these connections include an active adhesive that melts between the wires, when heat is applied, to provide a watertight seal. These multiple wire connectors are ideal for joining 1 wire to 2 wires, or joining up to 4 wires at a time.
elektralink butt splicesElektralink™ Sealed Solder Butt Splices
ElektraLink Sealed Solder Butt Splices are an excellent choice for professional electricians that require high quality electrical connections. These butt splices provide that much needed connection.  Each splice has just the right amount of solder to create a secure connection and an adhesive lined heat shrink tubing to seal it and provide protection against the elements.
perma-seal butt splicesPerma-Seal™ Step-Down Butt Splice Connectors
These heat sealed step-down butt connectors provide additional protection against the elements. When connecting two different sized wires or joining two wires to one, this is the perfect solution. The smaller end of the connector is color coded for easier identification and quick installation.
multilink butt splicesMultilink™ Crimp and Solder Sealed Butt Splices & Ring Terminal Kits
MultiLink Crimp and Solder Sealed Butt Splices are crimped for maximum reliability, then soldered for strength and conductivity. Each butt splice has an adhesive lined heat shrink tubing to provide a durable and weatherproof seal. This multi-step process has a high tensile strength and provides you with the most secure connection possible.
heat gunVT-1100 Heat Gun
Our 120VAC 1200W heat gun has variable temperature capability from 250 to 1100 degrees F. It has a two speed air flow adjustment with a stand for easy hands-free use.

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by PowerReviews
Uninsulated Step Down Butt Connector 18-20 AWG to 22-24 AWG- Pack of 50

(based on 1 review)

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Reviewed by 1 customer

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Great connectors

By Ry

from NJ

About Me Gearhead

Verified Buyer


  • Durable
  • Easy To Install
  • Fits Multiple Cable Sizes
  • Great Fit
  • Great Protection


    Best Uses

      Comments about Uninsulated Step Down Butt Connector 18-20 AWG to 22-24 AWG- Pack of 50:

      We needed a step down connector but could not use an insulated one for the application. These connectors were just what we needed. They worked great and are now part of the design.

      • Primary use:
      • Business

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