I stock 4.2 x 40 Black Self Tapping Screws because I know your production line can't wait for slow fixes. These screws offer dependable thread forming in metal and sheet materials, reducing drilling steps and boosting line speeds. With a black oxide finish, they resist corrosion in light-duty indoor environments and provide a clean, professional look. I source them in bulk, so you can lock in steady supply while you keep your costs in line. Our pricing is designed for bulk buyers and I can share a tailored {Pricelist} to fit your order sizes and lead times. If you are chasing {Cheap} options without sacrificing strength, this size is a solid choice for frame assemblies, cabinets, enclosures, and light machinery. I can arrange test packs, documentation, and on-time delivery. Company detail: {}
This 4.2 x 40 black self-tapping screw stands out where service meets innovation. Engineered for electronics and thin-sheet assemblies, it delivers secure thread formation with a corrosion-resistant black oxide finish. The self-tapping tip enables drill-free installation, while tight tolerances reduce rework and support smooth automation for global production. In short, consistent performance across batches lowers total cost of ownership for global buyers. From a procurement view, you want predictable lead times, scalable quantities, and clear specs. Seek partners with robust quality controls, full traceability, flexible packaging (bulk or reels), and varied shipping terms. Benefit from technical support on materials and finish durability, transparent compliance, and responsive after-sales service. With a resilient, communication-driven supply chain, a standard fastener becomes a strategic enabler of international manufacturing.
| Attribute | Value |
|---|---|
| Size | 4.2 x 40 mm |
| Material | Carbon Steel (Grade 8.8) |
| Finish | Black Oxide |
| Head Style | Pan Head |
| Drive Type | Phillips PH2 |
| Thread Type | Coarse |
| Pitch | 0.80 mm |
| Length | 40 mm |
| Tensile Strength | 800 MPa |
| Substrate Compatibility | Wood and light metal sheets |
| Pilot Hole Diameter (Recommended) | 3.0 mm |
| Typical Applications | General purpose self-tapping for wood and sheet metal |