Product Search › 1-3/4 - 18 UNS 1TP1.7518 Image 1 of 1 1-3/4 - 18 UNS 1TP1.7518 $550.00 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.