The DIN 7985 standard specifies machine screws with a cross recessed pan head (often referred to as a “pan raised cheese head” due to its slightly elevated, rounded top surface with straight sides). This type of screw is a common fastener in numerous applications where a robust, reliable connection with a slightly pronounced head and good torque transfer is required. When made from stainless steel, these screws offer excellent corrosion resistance in addition to their mechanical properties.

Key Features

• DIN 7985 Standard: Adheres to the German Industrial Standard (DIN) 7985, ensuring consistency in dimensions, tolerances, and mechanical properties. This standard typically corresponds to ISO 7045 or EN ISO 7045.
• Cross Recessed Drive (Phillips or Pozi): Features a cross-shaped recess in the head (most commonly Phillips or sometimes Pozi drive). This allows for efficient torque transfer with a compatible screwdriver, facilitating quick and secure installation.
• Pan Raised Cheese Head:
  • Pan Head: Characterized by a slightly rounded, domed top surface with short, vertical sides. This design provides a larger bearing surface than a countersunk head, distributing pressure more effectively and offering a good grip for the drive tool.
  • Raised Cheese Head Aspect: While often generalized as “pan head,” the term “raised cheese head” sometimes refers to a pan head that is slightly more cylindrical or less domed than a traditional pan head, with distinct, slightly higher vertical sides, giving it a somewhat “raised” appearance compared to very flat pan heads. It strikes a balance between the larger surface area of a pan head and the more compact volume of a cheese head.
• Machine Screw Thread: Features precise, uniform threading designed to mate with pre-tapped holes or nuts, forming a strong, non-self-tapping connection, typically in metal or rigid plastic components.
• Stainless Steel Material: Provides excellent resistance to corrosion, rust, and oxidation, making these fasteners ideal for use in wet, humid, outdoor, or chemically exposed environments. Common grades include A2 (304) for general use and A4 (316) for enhanced resistance, particularly in marine or aggressive chemical settings.

Application

• Electronics and Electrical Enclosures: Used for assembling housings, circuit boards, and internal components where a secure, corrosion-resistant fastener is needed and a slightly proud head is acceptable.
• Household Appliances: Common in securing panels, internal mechanisms, and covers in ovens, refrigerators, washing machines, etc., benefiting from durability and corrosion resistance.
• Automotive Applications: Found in various interior and non-structural exterior parts where stainless steel’s corrosion resistance is an advantage, such as trim, light fixtures, or small component assemblies.
• Machinery and Equipment: Utilized for general assembly of industrial machinery, scientific instruments, and fabrication projects, especially where maintenance or potential exposure to moisture is a concern.
• Food & Beverage Industry: Due to the hygienic properties and corrosion resistance of stainless steel, these screws are suitable for equipment used in preparation and packaging.
• General Metal Fabrication: For joining metal sheets, brackets, and other components in a wide array of construction or manufacturing scenarios.
• High-Tech and Precision Devices: Where reliable fastening and resistance to environmental factors are important.

Advantages

• Corrosion Resistance: Stainless steel material provides superior protection against rust and degradation, extending the lifespan of the fastener and the assembly.
• Reliable Fastening: Machine threads ensure a strong, precise fit in tapped holes or with nuts, offering excellent resistance to loosening.
• Good Torque Transfer: The cross recess drive allows for efficient tightening with reduced cam-out compared to slotted screws.
• Versatile Head Design: The pan raised cheese head provides a good bearing surface, is visually less obtrusive than a hex head, and can withstand good tightening forces.
• Standardized: Adherence to DIN 7985 ensures interchangeability and consistent quality, beneficial for international manufacturing and repair.
• Durability: Stainless steel offers good strength and longevity, even in challenging environments.