This standard covers torque-tension requirements for two types of plating: 0.0002/0.0004 in. thickness electrodeposited cadmium plated and lubricated Grades B and C prevailing-torque type steel hex nuts in sizes 1/4 to 1 in., inclusive, and Grades F and G prevailing-torque type steel hex flange nuts in sizes 1/4 to 3/4 in, inclusive (see Table 1) and 0.0002/0.0004 in. thickness electrodeposited zinc clear chromate and lubricated Grades B and C prevailing-torque type steel hex nuts in sizes 1/4 to 1 in., inclusive, and Grades F and G prevailing-torque type steel hex flange nuts in sizes 1/4 to 3/4 in., inclusive (see Table 2).

The dimensional, mechanical and other performance requirements for these nuts are given in IFI-100/107. IFI-101 is considered to be an extension of IFI-100/107.

The torque-tension requirements covered in this standard apply only to the combination of laboratory conditions described in the test procedure (3.0). If other conditions are met in an actual service application, (such as different plating or coating on the nut or on the externally threaded part, different surface against which the nut is torqued, etc.) torque values must be adjusted in order to develop an equivalent tensile load in the mating externally threaded component.