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Expansion Nuts are vibration-resistant fasteners that provide quick attachment in blind or center-panel locations. These Expansion Nuts have spring legs for self-retaining in rectangular holes. If permanent retention is required, a special locking tab can be provided. Design variations accommodate box or robotics styles. Easy to apply, Expansion Nuts can be used in place of weld-, clinch-, or stake-type fasteners. No masking is required because they will not clog when painted either before or after installation.
Unit of Measure

Specifications

Panel Thickness

 N/A 2.1 mm2.5 mm

Screw Size

 N/A M4.2 x 1.69

Height

 N/A 12.40 mm

Design Variation

 N/A Dual Lead Thread Impression

Hole Length

 N/A 8.1 mm

Hole Width

 N/A 10.1 mm

SAP Number

 N/A 137675003

Features and Benefits

Features and Benefits

 N/A Box style expansion nuts reinforce the attachments and provide low-failure risk primarily in sheet metal applications. Tapered robotics expansion nuts are suited to automation in plastic and metals panels. Available in tapped barrel, key-hole, and speed-nut thread impressions, the tapped barrel offers the strongest attachment and is most beneficial in high volume applications.
  • One-piece, self-retaining
  • Convenience and economy of stamped fastener
  • Multiple thread strength and reliability
  • Prevailing torque inherent on screw
  • Screw will not loosen due to vibration, panel set or migration
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