The stainless steel bolt encountered water condensing in the air. Pollution means they contain a lot of sulfide or carbon monoxide. When they come into contact with water, they form sulfuric acid and hydroxide, which chemically corrode stainless steel bolts. Stainless steel bolts rust because the pr

Wing Nut Long TypeSIZEG （mm）F （mm）B （mm）L （mm）E （mm）Package (Pcs/Bag)Approx.Weight (Kg/1000Pcs)AISI 304 Cost (RMB/Pcs)AISI 316 Cost (RMB/Pcs)M619.0 44.7 16.2 8.6 4.8 100 17.5 2.8 4.0 M820.0 44.7 16.4 8.8 4.9 100 17.0 3.0 4.2 M1023

Material requirements for boltsPerformance levelMaterials and Heat treatmentChemical compositionTempering temperatureCPSB 1)℃minmaxmaxmaxmaxMin3.6 2)Carbon steel一一0.20.050.060.003一一4.6 2)一一0.550.050.060.003一一4.8 2)5.60.130.550.050.060.003一一5.8 2)一一0.550.050.066.8 2)6.8 2)Low carbon alloy steels (suc

DIN 582 Eye BoltSIZEA （mm）B （mm）C （mm）D （mm）E （mm）Package (Pcs/Bag)Approx.Weight (Kg/1000Pcs)AISI 304 Cost (RMB/Pcs)AISI 316 Cost (RMB/Pcs)M512.20 22.10 21.70 11.70 4.95 100 9.20 2.00 2.60 M616.42 27.00 29.60 16.00 5.36 100 19.8

Bolts grade, strength distinction and tighteningStrength to distinguish4.85.66.87.68.810.912.9Minimum breaking strength40kg/mm250kg/mm260kg/mm270kg/mm2800kg/mm2100kg/mm2120kg/mm2The material45#35#40chromiumAlloy steel (hot)Chromium-molybdenum alloy steel (hot)Ni-cr-mo alloy steel (hot)Ni-cr-mo alloy

Axial Proof Load for ThreadRive nutMechanical charThread SizeM3M4M5M6M8M10M12Round and Hex,Flat and (Reduced)countersunk head Proof LoadSteel/stainless steel390068001150016500250003200034000Aluminum19004000650078001230017500——