303 Stainless Steel Thumb Screw, Plain Finish, Knurled Head, 3/4" Length, Fully Threaded, #10-24 UNC Threads, Made in US (Pack of 5) Thumb screw for simple by-hand installation Stainless steel 303 provides better corrosion resistance than steel Diamond knurl has extra grip for manual tightening Longer head length than standard thumb screw for easier adjusting