1/4"-20 Plain Finish Grade A Finished Hex Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND LUBRICATION: OIL NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM END ITEM IDENTIFICATION: MRAP MAXXPRO RECOVERY VEHICLE (MRV); MRAP MAXXPRO DASH ISS W/OGPK AND W/CROWS WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 0.250 INCHES BEARING SURFACE TYPE: FLAT PART NAME ASSIGNED BY CONTROLLING AGENCY: BOLT,HH 1/2NF X 2 PHC TYPE 8 MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A563, GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL PROPRIETARY CHARACTERISTICS: NPAC