Hex Nut, Hex Nut, Steel, Grade 5, Zinc Plated, 1/4"-20 Dia./Thread Size, Right Hand, PK 100/ THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.219 INCHES NOMINAL END ITEM IDENTIFICATION: 5820-01-491-0215 WIDTH ACROSS FLATS: 0.438 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 0.250 INCHES SPECIAL FEATURES: GRADE 5 ZINC-PLATED STEEL HEX NUT 1/4 INCH - 20 SCREW SIZE, 7/16 INCH WIDTH, 7/32 INCH HEIGHT MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL