M8-1.25 x 30 18-8 Stainless Steel Metric Flat Head Socket Cap Screw is a 90° countersunk 18-8 stainless steel metric flat head socket cap screw for flush seating in a matching metric countersink. The head is intended to seat flush when the mating countersink is correctly prepared for the metric flat-head angle.

Guide rails and slide tracks use metric flat heads where any projection can interrupt motion or rub against a moving part. Some metric drawings call this 18-8 family A2 stainless; that is material wording, not a mechanical rating. Confirm overall length, head diameter, head height, socket size, and key engagement before substitution.

When a metric length is hard-to-find, Cold Headers can help review the requirement without changing the material or head style. Left-hand threading can be quoted for special metric flat head applications.

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: 30 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.