Self-tapping Screw

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The self-tapping screw is used to fasten metal and nonmetal materials such as plastic, wood, cork, copper, aluminum alloy and so on. The self-tapping screw is characterized by its high-speed installation and high connection reliability. The material of the self-tapping screw can be chosen among stainless steel, carbon steel, copper, and aluminum. Carbon steel is most commonly used with the code of 1018, 1022 10B21. And the strength of screws can reach the grade of 8.8.

Parameter

ISO Metric Coarse	PITCH	Major Diameter	Root Radius	Pitch Diameter	Minor Diameter male thread	Minor Diameter female thread	Thread Height male thread	Thread Height female thread	Tap Drill
	P	d=D	r	d2=D2	d3	D1	h3	H1
M1	0.25	1.00	0.036	0.838	0.693	0.729	0.153	0.135	0.75
M1.1	0.25	1.10	0.036	0.938	0.793	0.829	0.153	0.135	0.85
M1.2	0.25	1.20	0.036	1.038	0.893	0.929	0.153	0.135	0.95
M1.4	0.30	1.40	0.043	1.205	1.032	1.075	0.184	0.162	1.10
M1.6	0.35	1.60	0.051	1.373	1.171	1.221	0.215	0.189	1.25
M1.8	0.35	1.80	0.051	1.573	1.371	1.421	0.215	0.189	1.45
M2	0.40	2.00	0.058	1.740	1.509	1.567	0.245	0.217	1.60
M2.2	0.45	2.20	0.065	1.908	1.648	1.713	0.276	0.244	1.75
M2.5	0.45	2.50	0.065	2.208	1.948	2.013	0.276	0.244	2.05
M3	0.50	3.00	0.072	2.675	2.387	2.459	0.307	0.271	2.50
M3.5	0.60	3.50	0.087	3.110	2.764	2.850	0.368	0.325	2.90
M4	0.70	4.00	0.101	3.545	3.141	3.242	0.429	0.379	3.30
M4.5	0.75	4.50	0.108	4.013	3.580	3.688	0.460	0.406	3.80
M5	0.80	5.00	0.115	4.480	4.019	4.134	0.491	0.433	4.20
M6	1.00	6.00	0.144	5.350	4.773	4.917	0.613	0.541	5.00
M7	1.00	7.00	0.144	6.350	5.773	5.917	0.613	0.541	6.00
M8	1.25	8.00	0.180	7.188	6.466	6.647	0.767	0.677	6.80
M9	1.25	9.00	0.180	8.188	7.466	7.647	0.767	0.677	7.80
M10	1.50	10.00	0.217	9.026	8.160	8.376	0.920	0.812	8.50
M11	1.50	11.00	0.217	10.026	9.160	9.376	0.920	0.812	9.50
M12	1.75	12.00	0.253	10.863	9.853	10.106	1.074	0.947	10.20

Stocks

Y head black Sheet metal self-tapping screw
flat head self-tapping screw
stainless steel self-tapping screw
flat head thread-forming self-tapping screw
pan head thread self-tapping screw
shoulder self-tapping screw
partially threaded self-tapping screw
middle thread self-tapping screw
mini self-tapping screw
nonstandard customizing self-tapping screw