Meridyen Self-Drilling Screw YHB 3.9X16 (18,000 Pieces)

Meridyen Self-Drilling Screw YHB 3.9×16 mm — 18,000 Pieces

The Meridyen Self-Drilling Screw YHB 3.9×16 mm is a fastener designed for quick, secure installation in thin-to-medium gauge sheet metal, metal profiles and lightweight construction applications without pre‑drilling. The YHB wide‑bearing head design distributes pressure evenly, prevents crushing the sheet and provides partial sealing assistance. Supplied in a large pack of 18,000 pieces, it enables continuous work in serial production, on‑site and large‑scale assembly projects.

Technical Specifications

• Brand: Meridyen
• Diameter × Length: 3.9 mm outer diameter, 16 mm working length beneath the head
• Head Type: YHB — wide bearing surface, washer‑effect hexagonal flange head
• Thread Profile: Metal‑specific thread pitch; balanced for fast advance and reliable grip
• Point Feature: Self‑drilling tip; forms its own pilot hole, no pre‑drilling required
• Drive Type: Compatible with standard hexagonal wrenches
• Surface Coating: Galvanized; corrosion‑resistant, suitable for indoor and outdoor use
• Pack Contents: 18,000 pieces

Applications

• Fastening medium‑gauge sheet metal panels and profiles together
• Suspended ceilings, support systems and lightweight metal frame assembly
• Fixing roof and facade cladding sheet elements to the structure
• Securing air‑conditioning, ventilation duct and pipe support brackets
• Installation of metal doors, frames, fences and railings
• Manufacturing of electrical panels, white goods and machinery equipment
• Interior partition systems, fixture and connection work

Product Advantages

• No Pre‑Drilling Required: Self‑drilling tip penetrates sheet metal directly; noticeably reduces labour time and cost
• Wide Bearing Surface: YHB head spreads force over a large area; thin metals do not crush or tear, the washer‑assist profile improves sealing
• Well‑Suited Length: 16 mm working length provides sufficient grip depth for multiple thin sheets or single sheet plus insulation assemblies
• Fast High‑Volume Installation: Operates at high speed with electric screwdrivers; 18,000‑piece bulk pack ensures uninterrupted production
• Reliable Hold: Metal‑optimised thread design resists loosening under vibration and wind load; the connection remains secure
• Cost‑Effective Bulk Pack: High‑volume packaging lowers unit price; reduces reorder frequency and simplifies procurement
• Long‑Lasting Protection: Galvanized coating provides durable resistance against moisture, rain and outdoor conditions

Installation Recommendations

• Position the screw perfectly perpendicular to the sheet surface; angled entry increases tip wear and reduces holding strength
• Best suited to total assembly thicknesses of 3–7 mm; ensure sufficient thread protrusion through the far side
• Do not over‑tighten; stop when the head makes full contact to prevent buckling the sheet
• Install a gasket between dissimilar metals; direct contact may cause galvanic corrosion
• Store in dry, well‑ventilated conditions; prolonged exposure to continuous moisture shortens coating life

Frequently Asked Questions

What does 3.9×16 mm mean and which thicknesses is it suitable for?
3.9 mm is the outer shank diameter; 16 mm is the effective length measured from beneath the head. It is ideal for sheet, profile and insulated assemblies with a total thickness of 3–7 mm.

What benefit does the self‑drilling tip provide?
It advances while drilling its own pilot hole, eliminating the need for separate pre‑drilling; this saves time and labour and significantly boosts efficiency especially in serial production.

What makes the YHB head different?
The head forms an extended surface that distributes pressure; the hole does not enlarge in thin sheet, the material does not crush, and water/moisture ingress is partially blocked to provide sealing support.