M5-0.8 x 55 18-8 Stainless Steel Metric Flat Head Socket Cap Screw is used where a wipedown surface or sliding face needs the screw head seated into a prepared countersunk hole. Unlike a cylindrical socket head, the countersunk head spreads into the prepared recess instead of standing above the surface.

Packaging equipment can use metric flat head socket cap screws in wear strips, guards, brackets, and changeover components. Metric flat heads per ISO 10642 use a 90° countersink angle, while inch-series flat heads use 82°; the two styles do not seat properly in each other's countersinks. 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: M5-0.8 (coarse metric pitch)
• Length: 55 mm (overall, including head)
• Head Diameter: 10.00 / 9.78 mm (max/min)
• Head Height: 3.10 mm (max)
• Hex Key Size: 3.0 mm
• Minimum Key Engagement: 1.86 mm
• Dimensional Standard: ISO 10642

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