M3-0.5 x 20 18-8 Stainless Steel Metric Flat Head Socket Cap Screw supports compact stainless assemblies where top-side hex access is needed without a protruding cylindrical head. The head is intended to seat flush when the mating countersink is correctly prepared for the metric flat-head angle.

Conveyor wear strips and transfer plates can require flat heads so product or tooling passes over the surface without catching. Flat head screws measure length overall, including the head, so this size is selected by the total screw length shown on the print. Confirm overall length, head diameter, head height, socket size, and key engagement before substitution.

Cold Headers keeps this 18-8 metric flat head family separated from inch-series and alloy rows so purchasers can keep the drawing callout intact. 18-8 Metric Button Head Socket Cap Screws reduce projection without a countersink.

Technical Highlights

• Head Style: Flat (countersunk), internal hex drive
• Countersink Angle: 90°
• Material: 18-8 Stainless Steel
• Thread Size: M3-0.5 (coarse metric pitch)
• Length: 20 mm (overall, including head)
• Head Diameter: 6.00 / 5.82 mm (max/min)
• Head Height: 1.86 mm (max)
• Hex Key Size: 2.0 mm
• Minimum Key Engagement: 1.05 mm
• Dimensional Standard: ISO 10642

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.