SSZ Screw Inserts

General

Insert Thread	Insert Thread Code	L Insert Length	Insert Length Code	Boss Hole Dia. B		A Head Thickness	C Head Diameter	D Insert Diameter Max.
				Thermo– plastics +0.10 -0.00	Thermo– setting +0.10 -0.00
M2 x 0.4	M2	6.00	6.00	4.00-4.10	4.10-4.30	0.58	6.00	4.50
M2.5 x 0.45	M2.5	6.00	6.00	4.00-4.10	4.10-4.30	0.58	6.00	4.50
M3 x 0.5	M3	6.00	6.00	4.50-4.60	4.60-4.80	0.58	6.50	5.00
M3.5 x 0.6	M3.5	8.00	8.00	5.30-5.40	5.50-5.70	0.73	7.50	6.00
M4 x 0.7	M4	8.00	8.00	5.80-5.90	6.00-6.20	0.89	8.00	6.50
M5 x 0.8	M5	10.00	10.00	7.10-7.20	7.30-7.60	1.06	9.50	8.00
M6 x 1.0	M6	14.00	14.00	8.60-8.80	9.00-9.40	1.32	12.00	10.00
M8 x 1.25	M8	15.00	15.00	10.60-10.80	11.00-11.40	1.32	14.00	12.00
M10 x 1.5	M10	18.00	18.00	12.60-12.80	13.00-13.40	1.57	16.00	14.00
M12 x 1.75	M12	22.00	22.00	14.60-14.80	15.00-15.40	1.57	18.00	16.0

(1) All dimensions are in millimeters and reference unless toleranced.
(2) Pencom recommends determining the minimum hole wall thickness through testing in the application.

Boss Design Recommendation

The SSZ Screw Zert is designed to be installed into a straight hole with a 1°inclusive taper. 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. PENCOM recommends a 60°countersink, with a depth equal to the external thread pitch of the insert being used, at the top of the hole to prevent chipping of the surrounding boss hole surface. Hole diameters are dependant on the type of plastic being used with harder plastics requiring larger holes than softer plastics, for example. Diameter ranges shown in the tables are those recommended for thermoplastics and thermosetting plastics with the exact hole size determined through testing in the application.

Installation

The slot in the insert acts as a thread cutting edge. Inserts are installed following standard tapping procedures using hand tools or conventional tapping equipment.