Press-in Inserts

EDZ – Expansion Diamond Zerts

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3D CAD Models available. Contact a PENCOM Account Representative to request.

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

General

Inch

Insert Thread Insert Thread Code Boss A Head Thickness C Head Diameter D Insert Diameter
B Hole Dia. +.004 -.000 W Wall Thickness Min.
2-56 256 .126 .094 .017 .187 .124
4-40 440 .157 .126 .020 .218 .156
6-32 632 .189 .142 .026 .250 .186
8-32 832 .220 .157 .032 .281 .217
10-24 1024 .252 .189 .039 .312 .249
10-32 1032 .252 .189 .039 .312 .249
1/4-20 2520 .315 .236 .049 .375 .311
1/4-28 2528 .315 .236 .049 .375 .311
5/16-18 3118 .378 .276 .049 .437 .374
5/16-24 3124 .378 .276 .049 .437 .374

(1) all dimensions are in inches and reference unless toleranced.

Metric

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

Inch

Insert Thread L Insert Length Insert Length Code
2-56 .1552 155
4-40 .138 138
.1862 186
6-32 .138 138
.2492 249
8-32 .197 197
.3122 312
10-24
10-32
.236 236
.3712 371
1/4-20
1/4-28
.374 374
.4972 497
5/16-18
5/16-24
.374 374
.4972 497

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

Metric

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.

edz-design

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

edz-performance
(1) Performance data shown is for preferred insert lengths and reference only. Variations in application, boss material type and size, and installation method will affect the loads. PENCOM strongly encourages testing in the application.