1/4"-20 Panel Range:.025" -.150" Center 25/32" Extruded U Nut / PANEL THICKNESS: 0.025 INCHES MINIMUM AND 0.150 INCHES MAXIMUM END ITEM IDENTIFICATION: F-15SA HOLE TYPE AND QUANTITY: 1 TAPPED HOLE THREAD QUANTITY PER INCH: 20 HOLE NOMINAL THREAD DIAMETER: 0.250 INCHES SURFACE TREATMENT: PHOSPHATE OVERALL