MW Industries, Inc. - Precision Metal Components
Empowering Innovation.
    Engineering Value.

E & HE Series Expansion Inserts

/E & HE Series Expansion Inserts
E & HE Series Expansion Inserts 2018-02-22T17:29:22+00:00

E & HE Series: Threaded Expansion Inserts for Plastics

E & HE Series Threaded Expansion InsertsOur E & HE Series threaded expansion inserts are designed to provide strong reusable threads in thermoset and other hard plastics. Expansion inserts are pressed into the plastic and expand when the assembly screw is tightened. The sharp diamond knurling provides resistance to tensile and torque loads. The mating screw should be designed for full thread engagement. This will allow the insert to fully expand. For best results, the boss diameters should be approximately 2-1/2 times the recommended hole size. In “through-hole” applications, the HE Series flange adds greater strength for tensile pull loads. Inserts are available with or without a flange.

Recommended Hole Size – See chart below for installation hole size. Additional information can be found in our Design Guidelines.

Printable Catalog Page
Expansion Inserts Line Diagram
Headed Expansion Insert Diagram
E
SERIES THREADED EXPANSION INSERTS
INCH METRIC A
±.005
B
±.005
Hole
Size
+.003
-.000
Thread
Size
Part
Number
Thread
Size
Part
Number
2-56 256
x 157E
M2.0
x 0.4
M20
x 157E†
.136 .157 .126
4-40 440
x 188E
M3.0
x 0.5
M30
x 188E†
.165 .189 .157
6-32 632
x 250E
M3.5
x 0.6
M35
x 250E†
.197 .252 .185
8-32 832
x 312E
M4.0
x 0.7
M40
x 312E
.230 .315 .217
10-24 1024
x 375E
M5.0
x 0.8
M50
x 375E
.260 .374 .248
10-32 1032
x 375E
.260 .374 .248
1/4-20 2520
x 500E
M6.0
x 1.0
M60
x 500E
.327 .500 .311
5/16-18 3118
x 500E†
M8.0
x 1.25
M80
x 500E†
.390 .500 .374
HE
SERIES THREADED EXPANSION INSERTS
INCH METRIC A
±.005
B
±.005
C
±.005
D
±.005
Hole
Size
+.003
-.000
Thread
Size
Part
Number
Thread
Size
Part
Number
2-56 H256
x 157E
M2.0
x 0.4
HM20
x 157E
.189 .136 .024 .157 .126
4-40 H440
x 188E
M3.0
x 0.5
HM30
x 188E
.220 .165 .024 .189 .157
6-32 H632
x 250E
M3.5
x 0.6
HM35
x 250E†
.252 .197 .031 .252 .185
8-32 H832
x 312E
M4.0
x 0.7
HM40
x 312E
.283 .230 .031 .315 .217
10-24 H1024
x 375E
M5.0
x 0.8
HM50
x 375E
.315 .260 .039 .374 .248
10-32 H1032
x 375E
.315 .260 .039 .374 .248
1/4-20 H2520
x 500E
M6.0
x 1.0
HM60
x 500E
.374 .327 .051 .500 .311
5/16-18 H3118
x 500E†
M8.0
x 1.25
HM80
x 500E†
.433 .390 .051 .500 .374

† Non-Stocking Item – Minimum Order May Apply