Stainless Steel Round Head Self Drilling Screws

Overview:

Stainless steel round head self-drilling screw is a kind of screw with high strength, corrosion resistance. It adopts self-drilling design, which can directly drill into wood and metal without pre-drilling, and has the advantages of simple installation and fast speed. At the same time, stainless steel self-drilling screw is not easy to rust, have good corrosion resistance, and long service life. In addition, the round head design improves the efficiency of tightening, reduces the chance of surface pressure, and can better protect the surface of the item. Therefore, stainless steel round head self-drilling screws are widely used in construction, furniture manufacturing, and other fields.‌

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Specifications

Dimension Table

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Thread Size		ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3
P	Pitch	1.1	1.3	1.4	1.6	1.8	1.8
a	max	1.1	1.3	1.4	1.6	1.8	1.8
dk	max	5.6	7	8	9.5	11	12
dk	min	5.3	6.64	7.64	9.14	10.57	11.57
k	max	2.4	2.6	3.1	3.7	4	4.6
k	min	2.15	2.35	2.8	3.4	3.7	4.3
r	min	0.1	0.1	0.2	0.2	0.25	0.25
R	≈	5	6	6.5	8	9	10
dp		2.3	2.8	3.6	4.1	4.8	5.8
Drilling range(thickness)		0.7~1.9	0.7~2.25	1.75~3	1.75~4.4	1.75~5.25	2~6
Socket No.		1	2	2	2	3	3
M1		3	3.9	4.4	4.9	6.4	6.9
M2		3	4	4.4	4.8	6.2	6.8