304 - Stainless steel - Cross recessed hexagon bolt

Overview: The Convenience of 304 Cross Bolts

Often referred to as Stainless Combi Bolts or Jack Screws, these fasteners resolve a common engineering challenge: limited tool access. By integrating a cross recess into a standard hexagonal head, these Phillips Hex Screws provide a backup fastening method. If a wrench cannot fit into a tight assembly space, a screwdriver can be used instead. This versatility makes them exceptionally popular in furniture manufacturing, automotive trim assembly, and electronic enclosures.

Material Guide: Why Choose A2 Stainless?

We manufacture this specific line exclusively in A2 Stainless Steel (AISI 304). This material is selected to provide the best balance between durability, cost, and environmental resistance.

• Corrosion Resistance: 304 grade contains approximately 18% chromium and 8% nickel. This chemistry forms a passive oxide layer that protects the Combi Bolt from rust in humidity, rain, and oxidizing acids.
• Aesthetic Finish: Unlike plated carbon steel which can chip and rust, Phillips Hex Head Bolts made from stainless steel are corrosion-resistant all the way through. They are hygienic and easy to clean, suitable for visible fixtures.
• Mechanical Strength: Grade A2-70 offers a tensile strength of approximately 700 N/mm², which is more than sufficient for the non-structural applications where these dual-drive bolts are typically utilized.

Quality Assurance and Documentation

Material authenticity is the core of our business. To guarantee that you are receiving genuine 304 stainless steel, we provide EN 10204 Type 3.1 Material Test Certificates (MTC) free of charge upon request. This certificate details the chemical composition of the production batch. Please ensure you mention this requirement when finalizing your order. Third-party inspections are also available for an additional fee.

Industrial Applications

The Cross Hex Bolt is a staple in industries prioritizing user-friendliness. In the furniture industry, it allows end-users to assemble products with a simple screwdriver. In electronic enclosures, it facilitates easy access for technicians who may carry minimal tools. It is also widely used in scooter and bicycle components where rust resistance and aesthetics are critical.

Frequently Asked Questions

What tools can I use to install these Phillips Hex Screws?

The primary advantage of this design is compatibility. You can use a standard open-end wrench, a ring spanner, or a socket set on the hexagonal outer head. Simultaneously, the internal recess accepts a Phillips (PH) screwdriver. This dual capability ensures that installation is possible even if one type of tool is unavailable or if access is restricted.

Is 304 Stainless Steel suitable for marine use?

For direct exposure to saltwater or marine environments, we generally recommend upgrading to 316 (A4) stainless steel due to its molybdenum content. While 304 Cross Bolts have excellent rust resistance for general outdoors, constant exposure to salt spray may cause superficial tea-staining over time.

Do I need washers with Stainless Combi Bolts?

While not strictly mandatory, using a stainless steel flat washer and spring washer is highly recommended. The washer distributes the load to prevent the hex head from damaging the surface finish, while a spring washer helps maintain tension, especially since stainless steel is less elastic than high-tensile carbon steel.