| 摘要 |
A flush mountable pierce nut including a rectangular pilot portion, flange portions on opposed sides of the pilot portion and parallel re-entrant grooves defined in the flange portions on opposed sides of the pilot portion, wherein the areas of the fracture planes through the axis of the nut and generated from the nut grooves are generally equal pursuant to a predetermined dimensional relationship, thereby minimizing the material costs of the nut fastener while maintaining the optimum strength of the fastener in a proof load condition.
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