1/4-20 x 2-1/2" Flat Countersunk Head Machine Screws, Phillips Drive, 304 Stainless Steel 18-8, Full Thread, Coarse Thread UNC, 25 PCS

About Flat (Countersunk) Head Machine Screws Flat (Countersunk) Head Machine Screws have a flat top that tapers down to a cone shape that will sit flush into a countersunk hole and give a finished appearance. They are known for their effecient application performance and endurance widely used in a variety of industries such as construction, manufacturing, engineering, assembling, aircraft and so on and serves a wide range of use for professionals, amateurs, landlords, repairmen and DIYers. IMPORTANT SIZING NOTES: Length Includes Head All flat head screws are measured from tip to the top of the head (total length), as per ANSI/ASME standards. Micro-Sizes Alert Thread diameters #2-56 & #4-40 are thinner than a toothpick Short lengths like 1/4" (6.35mm) & 3/8" (9.53mm) are smaller than a pencil eraser Images are magnified for detail clarity Double-Check Your Specs 1. Measure your existing screws before ordering 2. Review size charts in product images 3.Don't rely solely on visual appearance Need Help? Unsure about sizing? Message us with your: ① Material thickness ② Hole diameter ③ Application → We'll respond within 24hrs with personalized recommendations Note The Flat (Countersunk) Head Machine Screws length are measured from the top to the end of the thread and the thread length is the overall length minus the height of the head. Contact Us: If you have any questions when using, please feel free to contact us by Amazon message.