NINGBO TRANSHOW FASTENER CO., LTD.  

Product Name: Metric Standard Class 8.8 Grain Silo Bolt Nut Model NO.: M8x20 Finish: Dacromet Application: Machinery Grade: 8.8 Standard: DIN Head Style: Hexagonal Connection: Common Bolt Type: Hexagon Head Material: Alloy Steel Trademark: TS Bolt Transport Package: Carton and Pallet Specification: M8 - M20 Origin: China(Mainland) Product Description Metric StandardClass 8.8 Grain Silo Bolt NutGeneral Specifications as perDIN6921 (with curved flange head)Or DIN933 (hexagon head)Special desiged collar with curve for assembly with EPDM washerThreads SizeM8, M10, M12, M16Bolts Length: 19mm~50mmClass 8.8 (DIN/ISO)High TensionSteel Quenched & TemperedCompatiable with Hex Nut DIN934 or Flange Nut DIN6923Features:SiloBolts specially designed for fastening (fixing) grain silos or related agriculture storages that need high strength, long last and good sealing features.The hex head with a curved collar design is to fit a HDPE or EPDM washers.Surface Finish:Options: Salt Spray Test (ASTM B117) 500~2000Hrs without red rustElectric zinc galvanizing withtrivalent chromate conversion (blue/white or yellow converter).Trivalent chromate conversion with yellow converter is one of a variety of chromate conversion coatings available for use on Eberhard parts.Chromate conversion coatings are produced on various metals through chemical or electrochemical treatment with mixtures of trivalent chromate conversion and certain other compounds.Through these treatments, the metal surface is converted to a superficial layer containing a complex mixture of trivalent chromate conversion compounds. Thickness from 12~20microOrganic Coating/Mechanical Coatings