316/410 Stainless Steel Self-Drilling Screws for structural steel
Drill and fasten, no rust, no pre-drilling.
Full stainless strength for harsh, wet environments.
Save labor time, eliminate future replacement costs.
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Sinsun Stainless Steel Self Drilling Screws: Defy Corrosion, Install with Speed.
Sinsun stainless steel self-drilling screws combine drill & fasten in one step with ultimate rust resistance for harsh environments. Request specs & bulk pricing.A high-quality image showing the screw drilling into metal, with a split-screen or inset contrasting a pristine Sinsun screw next to a heavily corroded standard screw in a coastal/industrial setting.
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Product Overview
Self-Drilling Screws from Sinsun are ideal for jobs that require both quick installation and long-lasting, maintenance-free performance.
These fasteners are the best choice for coastal construction, chemical processing plants, food and beverage infrastructure, exterior architectural features, and any place that is exposed to wet, salty, or corrosive elements.
They combine the time-saving benefit of a self-drilling point with the natural corrosion resistance of stainless steel. They are made entirely of stainless steel, not just coated, so they offer permanent protection.
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Ultimate Corrosion Resistance
Fabricated from solid A2-70 (304) or A4-80 (316) stainless steel, providing superior resistance to rust, oxidation, and chemical attack compared to coated carbon steel screws. Ideal for lifetime installations.
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True One-Step Installation
The hardened stainless steel drill point penetrates metal up to specified gauges without a pilot hole, dramatically reducing labor time and tool changes on site.
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Consistent Strength & Durability
The homogeneous stainless steel material ensures the drill point, shank, and head maintain integrity. It resists galling (cold welding) during driving better than some soft carbon steels.
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Factory-Direct Quality Assurance
Manufactured in our own facility with strict control over alloy composition and work-hardening processes, ensuring reliable performance and batch-to-batch consistency.
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Versatile & Reliable
A critical fastener for demanding applications including metal roofing in coastal areas, pool enclosures, marine fixtures, chemical tank cladding, and exterior HVAC installations.
| Specification | Details |
| Material Grade | A2-70 (304 Stainless Steel), A4-80 (316 Stainless Steel) |
| Standard | DIN 7504K / Similar |
| Drill Point | Hardened, self-drilling point (e.g., No. 2, No. 3, No. 4 for varying thickness) |
| Head Styles | Hex Washer Head (HWH), Pan Head, Countersunk |
| Drive Type | Phillips, Pozidriv, or Hex (Allen) |
| Shank Diameter | #8, #10, #12, 1/4" |
| Length | 3/4" to 4" (Standard), Custom lengths available |
| Washer | Integrated sealing washer (EPDM/Silicone) available on HWH models |
| Finish | Natural Stainless (passivated) |
| Packaging | Industrial bulk boxes, vacuum-sealed packs to prevent condensation |
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Q: What's the difference between 304 (A2) and 316 (A4) stainless steel screws?
A: 304 stainless steel offers excellent general corrosion resistance. 316 stainless steel contains molybdenum, providing superior resistance to chlorides (like salt) and acidic environments. For coastal or chemical applications, 316 is the recommended choice.
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Q: Are stainless steel self-drilling screws as strong as carbon steel ones?
A: The tensile strength of A2-70 and A4-80 grades is comparable to many carbon steel screws. While they can be slightly less "hard" than heavily case-hardened carbon steel, their overall durability in corrosive environments far exceeds coated screws, which lose strength once the coating fails and rust begins.
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Q: Can I use these to fasten stainless steel to stainless steel?
A: Yes, but it requires care. Using a wax-based lubricant on the threads is highly recommended to prevent galling (material cold-welding due to friction). Avoid over-tightening and use the correct drive speed.
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