Shop › Replacement Adjustment Screw and Nut Only, 5/16"-24 threads, Each Image 1 of 1 Replacement Adjustment Screw and Nut Only, 5/16"-24 threads, Each $8.95 Replacement Adjustment Screw and Nut Only, 5/16"-24 threads. Add To Cart Added! Replacement Adjustment Screw and Nut Only, 5/16"-24 threads. C-421-2170-0 You Might Also Like Fuel Pump Block-Off with Boss $12.95 Chromoly Gland Nut with Washer $38.95 Sold Out Piston Ring Set Chrome Top Ring, 90.5mm (2 x 2 x 4.8mm) $52.95 Sold Out Polished Pulley with Holes, Black Numbers $69.95 30 Degree 3/8" Male with 1/2" Hose Barb, Pack of 2 $13.95