Cross recessed (+) old JIS pan head screw Brass Chrome(Silver) 4 X 16 Pitch 0.7

This is the most widely used, representative pan head machine screw. It features a rounded upper edge profile. The head has sufficient thickness to engage firmly with a screwdriver, allowing for strong tightening.
There is no particular designated application. While used in a wide variety of settings, the machine screw itself is only available in sizes up to 12mm, making it suitable for fastening small components and similar applications.

Pan Head Machine Screw Head Dimensions Chart 　Pan Head Machine Screw Encyclopedia

• Cross recessed (+) old JIS pan head machine screw
• Nominal diameter (d): M4
• Length under head (ℓ): 16
• Pitch: 0.7
• Cross recess number: 2
• Head diameter (dk): Nominal 8, Tolerance 0, -0.5
• Head height (k): Nominal 2.3, Tolerance 0, -0.3
• Head chamfer section (c): Approx. 0.3
• Cross recess (m): Reference 4.5
• Cross recess depth (q): Max 2.33, Min 1.79