#8-32 Brass Machine Screw Hex Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.125 INCHES NOMINAL WIDTH ACROSS FLATS: 0.344 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 32 NOMINAL THREAD SIZE: 0.164 INCHES BEARING SURFACE TYPE: FLAT MATERIAL: COPPER ALLOY 268 OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: NICKEL OVERALL