... M45 3/16 to 4 inch Surface: brass Standard: DIN/ANSI/JIS/BS/IF Forged Brass Nut1. Metric Sizes Supply M5, M6 ... 2, Grade 5, grade 8 UNC and UNFSurface Treatment Options: Brass, bronze, sand blast Nickle, Chrome, Dacromet, Cr3+,Cr6+Other Material ... A2-70. A4-80 In Stock Brass Nut Available!Goods in Stock for immediately shipment! Brass, Carbon Steel and SS304 A2-70Bulk ...