Image 1 of 1 z - Stainless Steel Nylon Insert Locknut - 5/8"-18 Grade18-8 NE $6.75 5/8"-18 Grade18-8 NE Stainless Steel Nylon Insert Lock Nut Add To Cart Added! 5/8"-18 Grade18-8 NE Stainless Steel Nylon Insert Lock Nut You Might Also Like Quick View SS Heavy Full Nut - 2 - 4 1/2 $200.00 Quick View Coupling Pinch Bolt Set 432 - 7/16 - 20 x 2 1/2 $7.04 Quick View Coupling Bolt Set, Bolt Set 3/8 (375) $8.00 Quick View Coupling Pinch Bolt Set 500 - 1/2 - 20 x 2 3/4 $10.72 Quick View Bronze Heavy Full Nut - 2" x 4-1/2 $140.00