Feng Shui knowledge
China Lock Washers Suppliers
Washer, machine component that is used in conjunction with a screw fastener such as a Bolt and nut and that usually serves either to keep the screw from loosening or to distribute the load from the nut or bolt head over a larger area. For load distribution, thin flat rings of soft steel are usual.
Lock Washers,Spring Washer,Flat Washers,Grade A Washers,Bonded Seal Washers
Suzhou Gubao Screws Co.,Ltd. , https://www.gbscrewes.com