Standard Angle for Inch Flat Head Screws
Q: What is the standard angle for an inch flat head screw?
A: Flat head screws made in inch dimensions typically have a standard angle of 82°. This holds true per ASME 18.3 for flat head socket cap screws which are the most common.However ASME B18.6.3 for slotted and phillips flat head screws both 82 and 100 degrees are called out. Also in the aerospace industry a 100° flat head is typically the standard angle.