Product Search › 5/8 - 18 UNF 1TP6218 Image 1 of 1 5/8 - 18 UNF 1TP6218 $140.00 Part identification and A, B, C, and D dimensions listed within the product selection. Dimension reference image below. Quantity: Add To Cart Added! Part identification and A, B, C, and D dimensions listed within the product selection. Dimension reference image below.