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SKU 7000148820
Legacy SKU 80004000479
UPC 00054007215028
Part Number 557-BULK

3M™ Scotchlok™ Insulation Displacement Connector 557 provides a dual element connection. The connector is polypropylene insulated and used to connect 2 wires while insulating the connection. It is self stripping and flame retardant.

  • intended for use with common thermoplastic insulated wire such as: T, TF, TFF, TFN, TFFN, AWM, TEW, SAE GPT with a maximum insulation diameter of 3,5 mm
  • Accommodates 22 to 16 AWG solid/stranded
  • UL Listed and RoHS 2011/65/EU Compliant
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On it's way to you Late November, 2023  


Minimum Order 5,000 Items
Order Increment 5,000 Items
Easy To Install
Fast, Global Shipping
Industry Low Price
Product Dimensions
Imperial Metric
Weight 1.64 LBS
Shipping Dimensions
Weight 17.63 lb
Length 16.46 in
Width 12.13 in
Height 10.7 in
Color Red


  1. What is the 3M™ Scotchlok™ Electrical IDC 557-BULK?

    The 3M™ Scotchlok™ Electrical IDC 557-BULK is a pigtail connector that allows you to connect one or more wires together without having to strip and twist them manually.

  2. What wire sizes can be used with these connectors?

    These connectors are designed for use with wires between 22-16 AWG in size, which covers most smaller gauge wire applications.

  3. How many connectors come in each package?

    Each carton of our bulk pack contains 500 pieces. If you need even more than that, we also offer cases containing up to ten total cartons (that's a whopping 5,000 individual connectors)!

  4. Are these self-stripping connectors easy to use if I don't have much experience working with electrical wiring?

    Absolutely! Our self-striping system makes it extremely easy to get started - once your wires are properly inserted into the connector and crimped down using standard pliers or crimper tool, just give it an extra tug on either side so ensure everything has been securely attached.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Product Description

3M™ Scotchlok™ Insulation Displacement Connector 557

3M™ Scotchlok™ Insulation Displacement Connector 557 is a reliable and high-quality connector designed for various electrical applications. It is rated at 600V for building wire and 1000V for signs, fixtures, and luminaires, making it suitable for a wide range of installations.

This connector is built to withstand high temperatures, with a maximum temperature rating of 221 degrees F (105 degrees C). This ensures its durability and performance even in demanding environments.

Furthermore, the 3M™ Scotchlok™ Insulation Displacement Connector 557 is UL Listed, CSA Certified, and RoHS 2011/65/EU Compliant. These certifications guarantee its compliance with industry standards and regulations, providing peace of mind to users.

  • 600V rated for building wire
  • 1000V rated for signs, fixtures, and luminaires
  • Withstands temperatures of 221 degrees F (105 degrees C)
  • UL Listed
  • CSA Certified
  • RoHS 2011/65/EU Compliant
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