This is an M4 x 50mm Pozidriv pan head machine screw manufactured to DIN 85, intended for fastening metal-to-metal and metal-to-plastic assemblies where a low-profile rounded head and positive drive are required. The 50mm length is measured from the underside of the pan head to the tip, making it suitable for fixing panels, enclosures and components into tapped holes or with an M4 nut.

The screw is made from A2 (304) stainless steel, with a natural bright mill finish that offers good resistance to corrosion in indoor and mildly corrosive environments. It uses the ISO metric thread form (M4) with the standard coarse pitch of 0.7mm and is produced to DIN 85 head geometry. The drive type is Pozidriv (PZ), giving better screwdriver engagement and reduced cam‑out compared with a simple slotted head. The pan head provides a large bearing surface to distribute load and reduce the likelihood of pull‑through in thin materials.

Typical applications include fastening electrical and electronics enclosures, mounting brackets, light engineering assemblies, furniture fittings and general machine building. The combination of A2 stainless and Pozidriv makes this screw appropriate for building services, food equipment where 304 stainless is acceptable, and internal vehicle or equipment fittings. A2/304 is not recommended for prolonged exposure to aggressive chloride environments such as offshore or coastal salt spray without consideration of A4 stainless alternatives.

Key benefits include corrosion resistance inherent to A2/304 stainless, reliable drive engagement from the Pozidriv head, and compatibility with standard M4 tapped holes and nuts. Where specific strength is required, these screws are commonly supplied to the widely used A2 material class; where property class is specified you may see A2‑70 variants which indicate higher tensile strength. The pan head geometry to DIN 85 also ensures consistent head dimensions for counters and clearances.

Duchy Fasteners stocks this item (reference A2MCP5040050) across a broad range of metric sizes and pack quantities. We hold M4 lengths from short to long, and common pack sizes to suit trade and production use — contact us for availability and bulk pricing.