PSDBowhunter
Lil-Rokslider
Has anyone ever used McMaster-Carr for hardware? They have a huge selection. This was the closest I found on their website according to everyone's description (m4 x 0.5, 6mm length), but it's stainless.
www.mcmaster.com

McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.