Home / Retail Showroom / 1/2in-20 Plain Flanged Nut 12N 1/2in-20 Plain Flanged Nut 12N 1/2″-20 plain flanged nut. This nut is used on many standard 1/2 u-bolts. • 1/2″-20 Category: Retail Showroom Product ID: 3128 Related products 1.719 x 2.565 3.5-4.4k Grease Seal Dbl Lip 10-19 Buy now DEXTER 23-105 ELECTRIC BRAKE ASSEMBLY LH 12″ 6K Buy now Wallace Forge 1/2 x 3 1/2 Hitch Pin With Keeper 12H Buy now SOUNDOFF SIGNAL FORD DUAL BEACON 360 LIGHTING KIT Buy now