Metric

TSZ Thermoset Inserts

This product is also available in Inch

Features

Simple press–in installation.
Sharp helical knurls broach into thermoset materials to provide high torque–out resistance.
Self–aligning design.
Available in a wide variety of thread sizes, stud lengths and options.

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Part Desc.	Headed	Thread	Insert Length	Material

General

Insert Thread	Insert Thread Code	L Insert Length	Insert Length Code	Boss		A Head Thickness	C Head Diameter	D Insert Diameter	P Pilot Diameter
Insert Thread	Insert Thread Code	L Insert Length	Insert Length Code	B Hole Dia. +.004 -.000	W Wall Thickness Min.	A Head Thickness	C Head Diameter	D Insert Diameter	P Pilot Diameter
2-56	256	.162	162	.122	.063	.020	.187	.131	.117
4-40	440	.208	208	.150	.079	.023	.217	.165	.146
6-32	632	.247	247	.181	.098	.029	.250	.196	.178
8-32	832	.292	292	.213	.098	.035	.281	.228	.209
10-24	1024	.326	326	.244	.098	.042	.312	.259	.241
10-32	1032	.326	326	.244	.098	.042	.312	.259	.241
1/4-20	2520	.362	362	.307	.110	.052	.375	.332	.304
1/4-28	2528	.362	362	.307	.110	.052	.375	.332	.304
5/16-18	3118	.362	362	.366	.150	.052	.437	.383	.365
5/16-24	3124	.362	362	.366	.150	.052	.437	.383	.365
3/8-16	3716	.362	362	.484	.197	.062	.551	.499	.481
3/8-24	3724	.362	362	.484	.197	.062	.551	.499	.481

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

Boss Design Recommendation

The TSZ Thermoset 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. Allow the insert to rotate in the direction of the knurl during installation by using a punch with either a polished face or thrust bearing. 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.

Part Description	Quantity