x500 (12.5 oz) Aircraft/Aviation  3/8" x 1/8" MACHINE SCREW  S2656012-6-4  NEW Specs listed at the bottom of page. Take a look at the pictures for exactly what you will receive. I am selling many other small aviation parts on eBay currently. Shipping cost for each ADDITIONAL item is $1.00 (within the U.S.) Pickup is always free in Bellingham, WA SPECS: length: 3/8", grip: 5/16", thread diameter: 1/8", steel, phillips, 1/4" head