(-)Round head machine screw(Coarse Steel Zinc plated(Silver) 8 X 15 Pitch 1.25

The head of a round machine screw is nearly hemispherical in shape, similar to today's truss head machine screws. The flat machine screw has a low-profile cylindrical head. It was commonly manufactured in the past due to its simple production method.
Machine Screw Head Dimensions List　Encyclopedia of Round & Flat Head Machine Screws

Hot-dip galvanized coating has a large film thickness, and other surface treatments may not be compatible with it.
Additionally, even with the same hot-dip galvanized finish, compatibility issues may arise if the products are purchased from different suppliers.
Please note that returns may not be accepted in the cases mentioned above, so kindly acknowledge this before proceeding with your purchase.

• Slotted (-) round head machine screw coarse pitch
• Nominal diameter (d) M8
• Length under head (ℓ) 15.0
• Pitch (P) 1.25
• Head diameter (dk) Nominal 14
• Head height (k) Nominal 5.4
• Slot width (n) Nominal 1.6
• Slot depth (t) Nominal 3.3