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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These Heavy Duty Self-Clinching Nuts are available as either locking or non-locking. You may choose heat treated or non-heat treated, which offers an opportunity to upgrade fastening quality with appreciable cost reduction over weld nuts. They are perfect for aluminum and controlled steel applications.

All self-clinching fasteners install into a round hole that may be punched or drilled in ductile materials. Heavy Duty Self-Clinching Nuts provide a permanently attached fastener, which becomes an integral part of the panel or frame to eliminate problems associated with loose hardware. Self-Clinching fasteners provide added value by speeding initial assembly as well as servicing in the field, keeping costs to a minimum.
Unit of Measure

Specifications

Thread

 N/A Class 2B, MIL- S-7742; (6H ISO metric)

Thread Size

 N/A 1/4-20

Knob

 N/A Self-Locking

Dimension B

 N/A 0.500 in

Maximum Dimension A

 N/A 0.343 in

Maximum Dimension D

 N/A 0.058 in

Hole Inside Diameter

 N/A 0.344 in

Minimum Center of Hole to Edge of Panel

 N/A 0.34 in

Minimum Panel Thickness

 N/A 0.058 in

Self Locking C2

 N/A 0.189 in0.25 mm

Self Locking C2 Tolerance (±)

 N/A 0.01 in

Use In

 N/A CFH-Materials with Rockwell Hardness of B-80 or less and CFHN & CFHNL-Materials with Rockwell Hardness of B-60 or less.

Locking Performance

 N/A Prevailing torque complies with the requirements of IFI-100/107 for Grade B (inch) and ANSI B18:161M Class 9 (metric) locknuts.

Features and Benefits

Features and Benefits

 N/A Self-clinching fasteners are pressed into holes in sheet metal by applying a steady squeezing force. This results in the cold-flow of sheet material, which is displaced by the knurl, into the undercut area on the shank of the fastener. Once fully embedded, the knurled area prevents torque-out during tightening of the mating part.