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EPTAHUB's Standard Inserts

Standard Inserts

Press-Fit Inserts for Plastic Components

Thread Designation(UNC/UNF)	Maximum Insert Length (in)	Recommended Hole Diameter (in)
0-80 UNC	0.125	0.094
2-56 UNC	0.156	0.125
4-40 UNC	0.188	0.156
6-32 UNC	0.250	0.188
8-32 UNC	0.313	0.219
10-24 UNC	0.375	0.250
10-32 UNF	0.375	0.250
1/4-20 UNC	0.500	0.313
5/16-18 UNC	0.563	0.375
3/8-16 UNC	0.625	0.438

Metric Threads

Thread Specifications	Maximum insert Length (in)	Recommended Hole Diameter (in)
M3×0.5	0.189	0.157
M3.5×0.6	0.252	0.189
M4×0.7	0.315	0.220
M5×0.8	0.374	0.252
M6×1.0	0.500	0.315

Tapping Inserts for Plastic Assemblies

Thread Designation(UNC/UNF)	Maximum Insert Length (in)	Recommended Hole Diameter (in)
2-56 UNC	0.188	0.1285
4-40 UNC	0.234	0.152
6-32 UNC	0.281	0.196
8-32 UNC	0.328	0.228
10-24 UNF	0.375	0.266
10-32 UNF	0.375	0.266
1/4-20 UNC	0.484	0.339

Heat-Set Inserts for Plastic Parts

Thread Designation(UNC/UNF)	Maximum Insert Length (in)	Recommended Hole Diameter (in)
0-80 UNC	0.115	0.118
2-56 UNC	0.188	0.107
4-40 UNC	0.219	0.141
6-32 UNC	0.250	0.185
8-32 UNC	0.312	0.206
10-24 UNC	0.375	0.246
10-32 UNF	0.375	0.246
1/4-20 UNC	0.500	0.316

Helical Inserts

Thread Designation(UNC/UNF)	Maximum Insert Length (in)	Recommended Hole Diameter (in)
2-56 UNC	0.215	0.091
4-40 UNC	0.336	0.118
4-48 UNF	0.168	0.118
5-40 UNC	0.250	0.134
6-32 UNC	0.414	0.146
8-32 UNC	0.172	0.25
8-36 UNF	0.172	0.28
10-24 UNC	0.201	0.28
10-32 UNF	0.570	0.201
1/4-20 UNC	0.750	0.264

Metric Threads

Thread Designation	Maximum Insert Length (in)	Recommended Hole Diameter (in)
M2×0.4	0.086	0.083
M2.5×0.45	0.248	0.104
M3×0.5	0.295	0.126
M4×0.7	0.394	0.167
M5×0.8	0.492	0.209
M6×1.0	0.590	0.248
M8×1.25	0.787	0.331
M10×1.5	0.591	0.413
M12×1.75	0.472	0.492

Dowel Pins

Pin Size Designation (Inch)	Decimal Equivalent (in)	Maximum Pin Length (in)
1/32″	0.03125	.625
1/16″	0.0625	1.000
3/32″	0.09375	1.000
1/8″	0.125	1.000
5/32″	0.15625	0.500
3/16″	0.1875	1.000
1/4″	0.250	1.000

Metric Sizes

Pin Size Designation	Decimal Equivalent (in)	Maximum Pin Length (in)
1mm	0.0394	0.394
1.5mm	0.059	0.630
2mm	0.0787	0.787
2.5mm	0.0984	0.472
3mm	0.118	1.181
4mm	0.157	1.575
5mm	0.197	0.787
6mm	0.236	0.551
8mm	0.315	0.787