Meridyen Self-Drilling Washer Head Screw Rysb 4,8X16 (9,000 Pieces)

Meridyen Self‑Drilling Screw, Washer Head, Rysb Thread 4.8×16 mm — 9,000 Pieces

The Meridyen 4.8×16 mm Self‑Drilling Screw with Washer Head and Rysb thread is engineered for fast, secure fastening of thin metal sheets and profiles without pre‑drilling. Its integrated washer head creates a wide bearing surface, distributes pressure evenly, and prevents crushing of the material. Supplied in a bulk pack of 9,000 pieces, it ensures uninterrupted workflow for high‑volume production, construction sites and large‑scale assembly.

Technical Specifications

• Brand: Meridyen
• Diameter: 4.8 mm
• Length: 16 mm
• Head Type: Washer head — wide bearing surface, provides gasket‑like sealing effect
• Thread: Rysb profile, metal‑optimised pitch; fast drive and secure hold
• Point: Self‑drilling — forms its own pilot hole; no pre‑drilling required
• Drive: Hexagon socket; compatible with standard wrenches and drivers
• Surface Finish: Galvanised; corrosion‑resistant, suitable for indoor and outdoor use
• Pack Contents: 9,000 pieces

Applications

• Fastening metal sheets, panels and sections together
• Securing roof and facade cladding sheets to the substructure
• Suspended ceiling support systems and metal framing
• Mounting HVAC, ventilation and pipe support brackets
• Steel doors, railings, fencing and outdoor structures
• Automotive, white goods and metal furniture manufacture
• Construction, industrial plant and machinery installation

Product Advantages

• No Pre‑Drilling: Self‑drilling point penetrates metal directly; labour time and cost are significantly reduced
• Wide Bearing Surface: Washer head spreads load over a large area; avoids tearing or dimpling thin metal and assists sealing
• Secure Hold: Rysb thread form grips metal firmly; remains tight under vibration, wind and dynamic loads
• High‑Speed Installation: Compatible with electric drivers for rapid assembly; 9,000‑piece pack eliminates downtime on large projects
• Durable Finish: Galvanised coating protects against moisture, rain and weather; resists rust and wear long‑term
• Universal Compatibility: Works with standard hexagon tools; one fastener suits multiple metal thicknesses
• Cost‑Effective Bulk Pack: Higher volume lowers unit price; simplifies stock management and supports project budgeting

Installation Guidelines

• Drive at a true 90° angle to the surface; angled entry can blunt the point and damage the thread
• Select length to suit total material thickness; sufficient projection through the far side is essential for security
• Do not over‑tighten; stop when the washer head seats firmly — excessive force will deform the sheet
• Isolate dissimilar metals with a suitable gasket to prevent galvanic corrosion
• Match feed speed to screw rotation rate; driving too fast causes overheating and premature wear of the drill point
• Store in a dry, well‑ventilated area; prolonged exposure to moisture shortens the service life of the coating

Frequently Asked Questions

What does "self‑drilling" mean?
The tip is shaped like a drill bit — it cuts its own pilot hole as it advances, so no pre‑drilling is needed. Ideal for rapid assembly on sheet steel and metal profiles.

What is the benefit of a washer head?
The wide circular flange spreads pressure across a large area, preventing the screw from pulling through or denting thin metal. It also acts as a partial seal against water and moisture ingress.

What thickness is 4.8×16 mm best suited for?
Best performance is achieved where total clamped material thickness is between 4 and 10 mm — the ideal size for joining thin sheets and profiles.

Can it be used outdoors?
Yes — the galvanised finish provides good weather resistance. In coastal or high‑salinity areas, consider options with an extra protective coating.

Is it suitable for timber?
The thread profile is optimised for metal and will not deliver reliable holding power in wood. Use dedicated wood screws for timber applications.

How long will 9,000 pieces last?
Usage varies by project intensity, but this bulk quantity sustains high‑volume assembly work for several days without interruption and reduces re‑order frequency on large sites.