10-32X1/2 Phillips Pan Split Lock & Narrow Flat Washer Sems Full Thread 18 8 Stainless Steel (Pack Qty 3,000) BC-1108SNPP188

A pan head machine screw with a free-spinning lock washer and flat washer manufactured as one assembly The washer/screw assembly makes this a locking screw with the helical washer providing the locking action and flat washer distributing the load over a wider area