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 3.5K Slipper Spring 1203T3 Buy now TIRE & WHEEL ASSEMBLY 545 LR C 215-60-8TW5-C Buy now DEXTER 23-27 ELECTRIC BRAKE ASSEMBLY RH 10″ 3.5K Buy now CASTLE® DOT 3 BRAKE FLUID Buy now