Standard bolt torque chart pdf

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Bolts are new, standard finish, uncoated and not lubricated (other than the normal protective oil film). b. The load will be 90% of the bolt yield strength. c. Anti-seize refers to parts that have had an anti-seize lubricant applied just prior to assembly. GRADE 8 COURSE THREAD. BOLT size-pitch. LUBRICATED. WITH. ANTI- METRIC BOLTS, SCREWS & NUTS. TIGHTENING TORQUES. FAILURE OF THREADED FASTENERS DUE TO OVER - TIGHTENING CAN OCCUR BY BOLT SHANK FRACTURE OR BY STRIPPING OF. The values shown in the chart are to be used as a mid- range guideline. ** Torque values for 1/4" and. 5/16" sizes are in inch lb. All other. SAE & ASTM Bolt Grade Identification Marks and Mechanical Properties. Bolt Grade. Identification Marking. Specs. Nominal Size Tightening Torque (N.m). In preparing this guide to torque values, the following basic assumptions have been made: (a) bolts and nuts are new, standard finish, uncoated and not The below estimated torque calculations are only offered as a guide. Use of its content by anyone is the sole responsibility of that person and they assume1) The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt's minimum tensile strength. 2) For A307A, The below estimated torque calculations are only offered as a guide. The torque figures quoted have been based on a theoretical bolt load equal to 85%