It is a three-dimensional crimped hollow fiber, which is processed into a spherical shape cotton by a special ball forming technique. The inside of the cotton ball is hollow, and has a large ventilating space, which is more warm and breathable. Moreover, after the product is quilted, it will automatically expand, even if it is machine washed, it will not be deformed. Mostly used for pillows . Generally, three-dimensional 7D ( thickness ) * 51 ( length ) is used to make pearl cotton .
Low carbon USS flat washers, typically used with Grade 8 or hardened steel bolting, are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. USS (United States Standard) flat washers have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. ASTM F844 covers the standard specifications for unhardened steel flat washers for general use. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.
If you need more information or want to order washers, please contact us.
Carbon Steel Gasket,Zinc Coated Washers,Galvanized Steel Washers,Galvanized Plate Washers
Taizhou Hongchuang Hardware Co., Ltd. , https://www.jstaizhouhongchuang.com