Countersunk Self-Tapping Screws (DIN 7982) – 304 (A2) Stainless Steel
These 304 (A2) stainless steel countersunk (flat head) self-tapping screws are made to DIN 7982 / GB 846. The 90° countersunk head sits flush with the surface, while the sharp point and thread-forming profile cut their own thread in thin sheet metal, plastics and pre-drilled substrates.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | DIN 7982 / GB 846 |
| Head Type | Countersunk Flat Head, 90°, Cross Recess (Phillips) |
| Size Range | ST2.9 – ST6.3 |
| Length Range | 6 – 50 mm |
| Material | A2 (304) Stainless Steel |
| Point Type | Sharp point, thread-forming |
| MOQ | 5,000 pcs (standard sizes), 10,000 pcs (small sizes) |
| Lead Time | 5-12 days (standard), 15-25 days (custom) |
| Packaging | Bulk in cartons / Plastic boxes / Custom labeling |
Applications
- Sheet-metal panels requiring a flush finish
- Ducting and HVAC assemblies
- Electrical boxes and enclosures
- Plastic housings
- General fabrication and repair
Certifications
ISO 9001:2015 certified manufacturing. Material test certificates (MTC) per EN 10204 3.1 available on request. RoHS and REACH compliant.
Frequently Asked Questions
Why choose countersunk self-tapping screws?
The 90° flat head sits flush with (or just below) the surface after installation. That means nothing protrudes to snag, catch or interfere with adjoining parts — important for panels, ducting and fittings that must look finished or slide past each other.
Do self-tapping screws need a pilot hole?
In thin sheet metal, plastics and soft woods the sharp point and forming thread usually drive straight in without a pilot hole. In harder or thicker materials, a small pilot hole makes driving easier and avoids damaging the head recess.
Why stainless steel instead of zinc-plated self-tappers?
A2 (304) stainless steel gives inherent corrosion resistance — no plating to scratch through — making these screws the standard choice for outdoor, damp or hygiene-sensitive applications.
Do you provide material certificates?
Yes. Material test certificates per EN 10204 3.1 are available on request, and our manufacturing is ISO 9001:2015 certified. RoHS and REACH compliance documentation can also be provided.