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- Standard / SAE-J1701M
SAE J1701M
SAE J1701M : For metric threaded fasteners the torque-tension relationship is complex, depending on thread geometry, bearing surface condition, coefficient of friction, lubrication, coating system and tightening speed; these all must be understood and controlled to ensure that a predictable amount of preload will be maintained within the fastener joint. SAE J1701M provides the comprehensive technical guidance and torque-tension evaluation framework specifically developed for ISO metric series threaded fasteners. Presto Stantest's torque and clamp force testing instruments deliver the simultaneous torque, angle, and axial load measurement that SAE J1701M-compliant metric fastener evaluation demands.
Significance
SAE J1701M gives automotive engineers, fastener manufacturers, coating and lubricant suppliers, and assembly process engineers the technical framework to establish accurate metric fastener torque specifications, evaluate friction variability across surface treatments, validate tightening processes against defined clamp load targets, and compare fastener system performance objectively—supporting both product development and ongoing production quality assurance programs.
Scope
SAE J1701M covers tightening variables, friction coefficient characterisation, torque control strategies, and clamp load behaviour determination for ISO metric threaded fasteners across Class 2A external and Class 2B internal thread fits used in automotive and engineering assemblies, complementing the inch-series guidance provided in SAE J1701.