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Anonymous Coward User ID: 33394903 United States 09/15/2013 11:29 PM Report Abusive Post Report Copyright Violation | Grade 7 & 8 Hex Bolts SAE J429 Grade 7 and 8 bolts are made from medium carbon high strength alloy steel, quenched and tempered. Used for automotive, structural and high temperature applications; they are the strongest and most heat resistant of all SAE graded bolts. Their mechanical and strength properties are found on the fastener mechanical properties for steel charts on fastener distributor and manufacturer's websites or in the SAE and IFI handbooks. Grade 7 and 8 bolts are marked with five and six equidistant lines, respectively, beginning from the rim of the bolt head to its center. Grade 8 bolts are equivalent to ASTM A354 Grade BD bolts Read more: [link to www.ehow.com] |