1/4"-20 x 1-1/2" Phillips Drive Pan Head Grade 18-8 Stainless Steel Machine Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.50 INCHES NOMINAL FASTENER LENGTH: 1.50 INCHES NOMINAL HEAD STYLE: A23 PAN INTERNAL DRIVE STYLE: B1 CROSS RECESS TYPE 1 END ITEM IDENTIFICATION: F-15SA NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 SCREW MATERIAL: STEEL COMP 304 THREAD SERIES DESIGNATOR: UNC