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Multi-Threaded Self-Retaining U-Nuts, also known as Tapped Barrel U-Nuts, are primarily used in the automotive industry where extra strength is required. The strength of the tapped barrel u-nut is equal to the machine screw used. It allows single-wrench tightening of the thread assembly. In addition, some multi-threaded u-nuts are available in Free Spin or Prevailing Torque designs. This page displays Metric Thread X Pitch Sizes M4 x 0.70 - M4.2 x 1.69 for various panel thicknesses and an assortment of specifications to meet your application needs.
Unit of Measure

Specifications

Material

 N/A Spring Steel

Thread Size

 N/A M4.2

Panel Thickness

 N/A 2.00 to 3.00 mm

Throat Depth

 N/A 9.6 mm

Prevailing Torque

 N/A Yes

Fold Width

 N/A 12.5 mm

Overall Length

 N/A 16.8 mm

Overall Width

 N/A 10.5 mm

Pitch Size

 N/A 1.41 in

Original Equipment Manufacturer (OEM) Reference

 N/A N811355-S403 - (A)

Finish

Finish

 N/A Mech Copper - ID Only

Features and Benefits

Features and Benefits

 N/A
  • Savings - Reduce labor, weight and cost of your applications
  • Performance - These will out-perform Weld-Nuts
  • Anti-Wrenching - No fear of cross threading or stripping
  • Prevailing Torque Locking Feature - Offered as an option

Additional Information

Additional Information

 N/A Phos & Oil; Aluminum Organic (Silver & Grey); Phos/Zinc/Organic Coating; Phos Coat with Electrodeposited Black Organic (E Coat) Coating with Oil.

Note

Note

 N/A A wide selection of additional finishes is available upon request through EFC International. Dimensions labeled A, B, C, and/or D on the dimensions diagram may be approximate. Please consult with an EFC sales engineer is you have other requirements for your application.
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