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 DEXTER 23-26 ELECTRIC BRAKE ASSEMBLY LH 10″ 3.5K Buy now CASTLE® HIGHWAY 95™ Buy now 1.719 x 2.565 3.5-4.4k Grease Seal Dbl Lip 10-19 Buy now CASTLE® POWER STEERING FLUID & CONDITIONER Buy now