LSZ Low Stress Inserts Metric Inserts for Plastic

LSZ Insert Features

Rounded knurl pattern reduces stress in notch sensitive amorphous thermoplastics.
Rapid self–aligning installation using heat.
Double–ended to assist automatic feeding by eliminating the need for orientation during installation.
Knurl pattern provides high torque–out resistance.
Available in a wide variety of thread sizes, stud lengths and options.

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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. +0.10 -0.00	W Minimum Wall Thickness	A Head Thickness	C Head Diameter	D Insert Diameter	P Pilot Diameter
M2 x 0.4	M2	3.90	3.90	3.20	1.40	0.51	4.80	3.50	3.10
M2.5 x 0.45	M2.5	5.80	5.80	4.00	1.80	0.58	5.50	4.40	3.90
M3 x 0.5	M3	5.80	5.80	4.00	1.80	0.58	5.50	4.40	3.90
M3.5 x 0.6	M3.5	7.10	7.10	4.80	2.10	0.74	6.40	5.20	4.70
M4 x 0.7	M4	8.10	8.10	5.60	2.40	0.89	7.10	6.10	5.50
M5 x 0.8	M5	9.50	9.50	6.40	2.80	1.07	7.90	6.90	6.30
M6 x 1.0	M6	12.70	12.70	8.00	3.60	1.32	9.50	8.50	7.90
M8 x 1.25	M8	12.70	12.70	9.60	5.00	1.32	11.10	10.00	9.50

Boss Design Recommendation

The LSZ Low Stress Zert is designed to be installed into a straight hole with a 0.5° 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

Pre-heating is the recommended installation method. The insert should be hot enough to soften the plastic without melting it to avoid flash around the top. Avoid excessive pressure that would force an insert into a hole without allowing the plastic to properly soften and flow around the insert features.

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