Cap Screws Flat Socket 18/8 Stainless 5/8-11 X 5-1/2 are precision-engineered fasteners designed to deliver superior strength and corrosion resistance in a compact flat-head socket design. Crafted from 18/8 stainless steel (304), these cap screws offer excellent rust resistance and durability in a wide range of environments.

With a thread size of 5/8-11 UNC and a length of 5-1/2 inches, they provide reliable engagement in compatible tapped holes and ensure a secure, flush mounting surface for projects requiring a clean, low-profile fastener.

Key Specifications

• Head type: Flat Socket Cap Screw (flat-head, countersunk)
• Material: 18/8 stainless steel (304)
• Thread: 5/8-11 UNC
• Length: 5-1/2 inches
• Finish: Passivated for corrosion resistance (typical for 304 stainless)

Benefits

• Corrosion resistance: 304 stainless stands up to moisture, humidity, and many chemicals, making it suitable for outdoor and marine environments.
• Strength and durability: High-quality stainless steel provides reliable performance in demanding applications.
• Low-profile installation: Flat-head design allows flush mounting for a neat appearance and reduced snag risk.

Applications

• Machinery and equipment assembly
• Automotive and transportation components
• Outdoor furniture, enclosures, and structural assemblies
• Electrical or electronic housings requiring a secure flush mount

Maintenance tip: Regularly inspect fasteners for wear or corrosion, and clean with mild soap and water. Avoid harsh chemicals that can degrade stainless steel finishes.