This large collection of nuts and washers includes:
Barrel Hex Nut, Barrel Nut, Bush, Cap Nut, Cup Washer, Disc Spring Washer, Dome Nut, Double Barrel Nut, Insert Nut, Knock In Nut, Lock Nut, Nut, Nylock Nut, Plastic Washer, Saddle Washer, Spiked Insert, Spring Washer, Square Nut, Steel Washer, T-Nut, Wave Spring Washer, Wing Nut.
Metal material included
Also available as a nut / bolt package
Zipped using WinRAR, which is widely available and free to download.