Hot Double End 4-40 Rods PDF Print $9.63 SKU: SUL-494 Double End 4-40 Rods Add to Wishlist Add to Compare Back to: Radio Box & Acc. Description These are 4-40 size steel rods that are threaded on both ends. There are 10/pkg.Included in this package are two each of: 4" rods, 6" rods, 8" rods, 10" rods, and 12" rods.