EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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Closed End Insertnuts eliminate leakage past the threads from either side of the application.
  • Wedged Head for greater torque capabilities, especially in soft or thin materials & electrical grounding applications.
  • Low Profile
  • Large Diameter Head
  • Knurled Body for use in punched or drilled holes. During insertion, the knurled body expands 360° to fill the hole, providing torque strength and vibration resistance. A flange forms on the backside, without any need for adjustments, even in multiple thicknesses of materials.
Unit of Measure

Specifications

Thread Size

 N/A 3/8-16

Head Height

 N/A 0.035 in

Head Outside Diameter

 N/A 0.688 in

Hole Diameter

 N/A 0.531 in

Body Features

 N/A Knurled

Grip Call Out

 N/A 312

Maximum Grip Size

 N/A 0.312 in

Minimum Grip Size

 N/A 0.150 in

Head

 N/A Large

Material

 N/A Aluminum 5056 Brass 270/260 Monel 400 Steel 1010/1008

Maximum IATD

 N/A 1.12 in

Maximum ILB

 N/A 1.025 in

Dimension LB

 N/A 1.39 in

Thread Call Out

 N/A 616

End Features

 N/A Closed

Industry Standards/Certifications

 N/A Unified National Coarse (UNC)

Finish

Finish

 N/A
  • Tin-Zinc Trivalent Chromate ROHS compliant
  • Zinc/Yellow Dichromate per ASTM-B-633 Type II Fe/Zn (0.0003/8u) with Clear Protective Coating
  • Yellow Tin Zinc per BPS-TZ-327 (0.0003/8u) with Clear Protective Coating
  • Clear Protective Coating
  • Cadmium per QQP 416 Type I, Class 3 with Clear Protective Coating
  • Tin

Features and Benefits

Features and Benefits

 N/A
  • Maximum Torque Strength for soft or thin materials and electrical grounding applications
  • 360º Hole-Filling for torque strength and resistance to vibration
  • Backside Flange forms during installation even in variable thicknesses of material, without adjustment
  • Superior Thread Strength from internal rolled thread manufacturing process
  • Threads Gauge before & after installation
  • Reduce Inventory Grip range is 2-1/2 times that of standard rivet nuts
  • Corrosion Resistance Tin/Zinc alloy finish
  • Special Installation Tools available through EFC International can be located at any position on your assembly line, before or after finish.

Note

Note

 N/A Inserts listed on this page have Closed Ends, as pictured, for versatility.

Grip Range can be affected by parent material density and actual hole size. Therefore, EFC suggests trial installations to determine optimum grip.