Product Search › 3/8 - 20 UN 1TP3720 Image 1 of 1 3/8 - 20 UN 1TP3720 $220.00 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.