M3-0.5 x 50 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.
For machine repairs, Cold Headers can help match the thread, length, material, and countersunk geometry rather than substituting by appearance. Special left-hand metric thread requests can be discussed for unusual equipment. Alloy Steel Metric Flat Head Socket Cap Screws serve alloy-material metric prints.
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: 50 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.
