EDZ | Expansion Diamond Zerts

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Features

  • Simple press–in installation for most thermoplastics.
  • Mating screw resistant to loosening after installation.
  • Reverse–headed style provides excellent jack–out resistance.

Dimensions

General
Insert Thread Insert Thread Code Boss A Head Thickness C Head Diameter D Insert Diameter
B Hole Dia. +0.10 -0.00 W Wall Thickness Min.
M2 x 0.4 M2 3.20 2.40 0.43 4.80 3.20
M2.5 x 0.45 M2.5 4.00 3.20 0.51 5.50 4.00
M3 x 0.5 M3 4.00 3.20 0.51 5.50 4.00
M3.5 x 0.6 M3.5 4.80 3.60 0.66 6.40 4.70
M4 x 0.7 M4 5.60 4.00 0.82 7.10 5.50
M5 x 0.8 M5 6.40 4.80 0.99 7.90 6.30
M6 x 1.0 M6 8.00 6.00 1.25 9.50 7.90
M8 x 1.25 M8 9.60 7.00 1.25 11.10 9.50

(1) all dimensions are in millimeters and reference unless toleranced

Stud Length
Insert Thread L Insert Length Insert Length Code
M2 x 0.4 3.902 3.90
M2.5 x 0.45 4.702 4.70
M3 x 0.5 3.50 3.50
4.702 4.70
M3.5 x 0.6 3.50 3.50
6.302 6.30
M4 x 0.7 5.00 5.00
7.902 7.90
M5 x 0.8 6.00 6.00
9.402 9.40
M6 x 1.0 9.50 9.50
12.602 12.60
M8 x 1.25 9.50 9.50
12.602 12.60

(1) All dimensions are in millimeters and reference unless toleranced.
2 Preferred length. Custom insert lengths available by request.
(3) Custom insert lengths available by request.

Boss Design Recommendation

The EDZ Expansion Diamond Zert is designed to be installed into a straight hole with a 1° inclusive taper. The top of the hole should not be countersunk or counterbored as this will decrease the insert’s performance. The recommended hole size applies at the point reached by the bottom of the insert. Molded holes should be used wherever possible as drilled holes may result in diminished performance. Minimum boss wall thicknesses shown are for reference and may vary depending on the type of plastic.

Installation

Press the insert into the boss using a squeezing action – never a hammer blow. Ensure that the insert maintains axial alignment during installation to prevent tilting which will induce side loads on the boss. Oversize boss holes weaken the insert’s self-aligning characteristics causing side loads which may lead to possible boss cracking. Install a fixing screw with sufficient length to fully penetrate the insert and achieve maximum expanion prior to applying full clamping load. The EDZR Reverse–headed Insert should be mounted with the head on the back of the molding.

Performance

Material & Finish


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Material CodeMaterial DescriptionFinish CodeFinish Description

Contact a PENCOM Account Representative for other material & finish options.