304 - Stainless steel - Cross recess pan head screw

Why Grade 304 is the Standard Choice

Grade 304 stainless steel is the most widely used stainless alloy in the world, accounting for over 50% of global stainless steel production. For pan head screws, this translates to a fastener that resists corrosion in rain, humidity, and most common chemicals, while maintaining a bright, attractive finish. It is the "default" specification when engineers need stainless steel butdo not require the extreme marine resistance of 316.

Material Specifications: A2-70

Our 304 pan head screws are manufactured to the A2-70 strength class, providing reliable mechanical performance:

Property	Value	Significance
Tensile Strength	700 N/mm² (Min)	Maximum load before fracture.
Yield Strength	450 N/mm² (Min)	Point of permanent deformation.
Chromium Content	18%	Forms the passive oxide layer that prevents rust.
Nickel Content	8%	Enhances corrosion resistance and ductility.

Quality Assurance

We are committed to material authenticity. An EN 10204 3.1 Material Certificate verifying the chemical composition of the 304 stainless steel is available upon request. Please note that third-party inspection services require an additional fee.

Common Applications

304 stainless steel pan head screws are versatile and widely used across industries:

• Food Processing: Equipment assembly in kitchens and food production facilities.
• Outdoor Electronics: Securing enclosures for CCTV cameras, sensors, and communication devices.
• Medical Equipment: Non-implant device housings and laboratory instruments.
• Architectural Fittings: Signage, handrails, and decorative panels exposed to weather.

Frequently Asked Questions

Is Grade 304 suitable for food contact applications?

Yes, Grade 304 stainless steel is widely accepted as "food grade" and is commonly used in food processing equipment, commercial kitchens, and beverage production. It is non-reactive, easy to clean, and does not impart taste or odor to food. However, for applications involving high salt content or acidic foods over extended periods, Grade 316 may be preferred.

What temperature range can304 stainless screws withstand?

Grade 304 maintains good mechanical properties across a wide temperature range. It can be used continuously at temperatures up to approximately 870°C (1600°F) for intermittent service, and up to 925°C (1700°F) for short periods. At the other extreme, it retains excellent toughness at cryogenic temperatures, making it suitable for refrigeration and cold storage equipment.

When should I choose a pan head over a countersunk head?

Choose a pan head when you do not need a flush surface and want maximum bearing area. Pan heads are ideal for thin materials (sheet metal, plastic) because the wide head won't pull through. Countersunk heads require a machined recess in the material and are only suitable when you have sufficient thickness to accommodate the conical head shape.