Product Search › 5/16 - 18 UNC HTP3118 Image 1 of 1 5/16 - 18 UNC HTP3118 $180.00 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.