Precision, Shoulder Screw, 18-8 Stainless Steel, 1/4 in Shoulder Dia., 1 1/2 in Shoulder Length/ THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND SHOULDER DIAMETER: 0.250 INCHES NOMINAL SHOULDER LENGTH: 1.500 INCHES NOMINAL NOMINAL THREAD DIAMETER: 0.190 INCHES THREAD QUANTITY PER INCH: 24 MATERIAL: STEEL CORROSION RESISTING OVERALL THREAD SERIES DESIGNATOR: UNC