| Size | M3-M48 or non-standard as request&design |
| Finish | Plain, black oxide , Zinc Electroplating,Hot Dip Galvanizing,Copper plating, Nickel plating,Zinc impregnation,ETC. |
| Material | Carbon steel、Stainless steel |
| Grade | 4，8，10，12 |
| Standard | GB, DIN, ISO, ANSI/ASTM, BS, JIS,ETC. |
| Non-standards | OEM is available, according to drawing or samples. |
| Samples | Samples are free. |
| Package | Wooden boxes, pallet, cartons, plastic bags, nylon bags. |
The common used inch series flat washers are covered under the ASTM F844, these regular flat washers are designed with a bearing surface, uses under the head of a bolt or bolt-like external threaded fasteners. Its usually made of low carbon steel unhardend, with various surface treatment options, black oxide, black zinc, white, yellow galvanizing, dacromet, hot dipper galvanizing, etc. While aluminium alloy or stainless steels, SUS304, 18-8, SUS316, brass, copper and bronze are also available.
