M5-0.8 x 55 18-8 Stainless Steel Metric Socket Head Cap Screw is selected when a metric print calls for stainless construction and ISO-style socket head geometry. Use the listed metric pitch and length directly when replacing hardware from a European or Asian machine print. For stainless-on-stainless assembly, run threads at moderate speed and use lubricant or anti-seize when galling is a concern.

Machine builders using metric prints rely on exact diameter, pitch, and length to maintain part interchangeability.

Review the metric thread, length, head diameter, head height, socket size, and key engagement before substituting another screw. Cold Headers can help confirm the exact metric length and stainless family when replacement records are incomplete.

Technical Highlights

• Head Style: Cylindrical socket head, internal hex drive
• Material: 18-8 Stainless Steel
• Thread Size: M5-0.8 (coarse metric pitch)
• Length: 55 mm
• Head Diameter: 8.50 / 8.14 mm (max/min)
• Head Height: 5.00 / 4.82 mm (max/min)
• Hex Key Size: 4.0 mm
• Minimum Key Engagement: 2.7 mm
• Dimensional Standard: ISO 4762 / DIN 912

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