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 U-Bolt Plate For 3in Round Axles 9/16in U-bolts 117521 Buy now Wallace Forge 1/2 x 3 1/2 Hitch Pin With Keeper 12H Buy now CASTLE® POWER STEERING FLUID & CONDITIONER Buy now TIRE & WHEEL ASSEMBLY 545 LR C 215-60-8TW5-C Buy now