"The item measures 3.50 inches in width, featuring three flanges modified with tapped holes, and includes helical inserts conforming to MS122079, 0.1640-32 UNC-2B break tangs in 12 places; the material is aluminum compliant with QQ-A-200 and QQ-A-250 specifications, with a temperature range spanning from minus 40 degrees Celsius to plus 71 degrees Celsius."