M8-1.25 x 16 18-8 Stainless Steel Metric Flat Head Socket Cap Screw fits imported or internationally designed equipment that specifies metric countersunk socket hardware. Unlike a cylindrical socket head, the countersunk head spreads into the prepared recess instead of standing above the surface.

Moving-part clearance zones use countersunk screws to keep nearby slides, linkages, or covers from contacting the fastener head. Stainless-on-stainless threads can gall when driven fast and dry, so moderate installation speed with lubricant or anti-seize is common practice. 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: M8-1.25 (coarse metric pitch)
• Length: 16 mm (overall, including head)
• Head Diameter: 16.00 / 15.73 mm (max/min)
• Head Height: 4.96 mm (max)
• Hex Key Size: 5.0 mm
• Minimum Key Engagement: 2.85 mm
• Dimensional Standard: ISO 10642

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