Hexagon Head Tapping Screws

DONGSHAO is China manufacturer & supplier who mainly produces Hexagon Head Tapping Screws with many years of experience. Hope to build business relationship with you.

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Product Description

Our Hexagon Head Tapping Screws (also known as self-tapping/self-drilling hex screws) are engineered to deliver superior fastening performance without the need for pre-drilling. By combining exceptional core toughness with high surface hardness, these screws offer a reliable, one-step installation process.

Optimized Torque Transfer: The robust hexagonal head design ensures maximum contact with driving tools. This allows for seamless, high-torque transfer into the threads, drastically reducing cam-out and ensuring a rigid, slip-free lock.

Advanced Self-Tapping & Drilling Capabilities: Equipped with a specialized point geometry, these screws swiftly cut or drill through workpieces. They complete drilling, tapping, fixing, and locking in a single operation, eliminating prep time and reducing labor costs.

Superior Material Integrity: Manufactured using advanced heat-treatment processes, the screws feature an incredibly hard outer surface to penetrate tough materials, balanced by a resilient core that prevents shearing under high stress.

Excellent Environment Resistance: Treated with premium anti-corrosion coatings (such as hot-dip galvanization or specialized surface plating), they maintain excellent fastening stability in highly humid, coastal, or demanding outdoor environments.

Product Parameter

(mm)	ST2.2	ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3	ST8	ST9.5
P	0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
a max	0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
da max	2.8	3.5	4.1	4.9	5.5	6.3	7.1	9.2	10.7
s max	3.2	5	5.5	7	8	8	10	13	16
s min	3.02	4.82	5.32	6.78	7.78	7.78	9.78	12.73	15.73
c min	3.38	5.4	5.96	7.59	8.71	8.71	10.95	14.26	17.62
k max	1.6	2.3	2.6	3	3.8	4.1	4.7	6	7.5
k min	1.3	2	2.3	2.6	3.3	3.6	4.1	5.2	6.5
r min	0.1	0.1	0.1	0.2	0.2	0.25	0.25	0.4	0.4
d max	2.24	29	3.53	4.22	4.8	5.46	6.25	8	9.65
d min	2.1	2.76	3.35	4.04	4.62	5.28	6.03	7.78	9.43
d1 max	1.63	2.18	2.64	3.1	3.58	4.17	4.88	6.2	7.85
d1 min	1.52	2.08	2.51	2.95	3.43	3.99	4.7	5.99	7.59

Broad Industrial Applications

Thanks to their quick installation and heavy-duty reliability, these hex head tapping screws are widely used across global infrastructure and manufacturing sectors:

Infrastructure & Building Construction: Steel structure framing, bridges, highways, and building material fixation.

Energy Sectors: Photovoltaic (solar) mounting systems, wind power installations, and nuclear power facility support.

Heavy Industry & Equipment: Mining machinery, industrial pipelines, rail transit systems, and marine/shipping hardware.

Commercial Manufacturing: Automotive assembly, electrical appliances, industrial furniture, and heavy-duty equipment housing.

Manufacturing Capabilities & Customization

Supported by modern, large-scale production facilities, we process high-volume industrial orders with extreme precision.

Advanced Equipment Fleet: Driven by high-speed multi-station cold heading machines, automated wire rolling, precise CNC lathes, and highly controlled heat-treatment lines.

Custom OEM/ODM Production: We process non-standard and custom-shaped fasteners based on your technical drawings, offering tailored material compositions and custom surface finishes (e.g., Hot-Dip Galvanizing, Zinc Plating, Stainless Steel composites).

Full-Lifecycle Service Commitment

We ensure a seamless, hassle-free B2B purchasing experience from initial inquiry to long-term post

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