Ultra-Tow Tie Plate U-Bolt Set - fits 2in. What materials do u-bolts come in at The Home Depot? Oil finish only, no plating/coatings available. Skip to main content. You will most likely be using this kit on a 2" x 2" Square Galvanized 3500 lb Trailer axle for your boat trailer. U-Bolt 1/2" X 2-1/16" X 6-1/4" Square Zinc (Ea) Load Rite #2510.08 (84418Z) SKU: 1529. Imperial (Inch) (229) Thread Length 5/8" (2) 3/4" (3) 1" (25) 1-1/8" (8) 1-1/4" (27) ... Square Bend With 2 Nuts & 2 Washers This U-bolt has right angles instead of a half circle connecting its arms. ****  NO MINIMUM ORDER - BULK/JOBBER PRICING AVAIL ABLE - CALL 877-448-2448 **** *** All U-Bolts are Bent to your Selected  Dimensions and are Non-Returnable *, 20 PIECES OR LESS HAVE A 1-2 DAY LEAD TIME TO SHIP OUTORDERS OVER 20 PIECES TAKE ADDITIONAL DAYS OR WEEKS DEPENDING ON THE SIZE OF THE ORDER**UBOLT Grades**3/8" to 9/16"  is a Grade 5 Equivalent5/8" to 1" is a Grade 8 Equivalent, // , NO MINIMUM ORDER - BULK/JOBBER PRICING AVAIL, *** All U-Bolts are Bent to your Selected  Dimensions and are Non-Returnable *, 20 PIECES OR LESS HAVE A 1-2 DAY LEAD TIME TO SHIP OUT, ORDERS OVER 20 PIECES TAKE ADDITIONAL DAYS OR WEEKS DEPENDING ON THE SIZE OF THE ORDER, S01 - 1/2" x 1 3/4" Inside Width (Fine Thread), S02 - 1/2" x 2" Inside Width (Fine Thread), S03 - 1/2" x 2 1/4" Inside Width (Fine Thread), S04 - 1/2" x 2 3/8" Inside Width - Fine Thread, S05 - 1/2" x 2 1/2" Inside Width (Fine Thread), S06 - 1/2" x 2 3/4" Inside Width (Fine Thread), S07 - 1/2" x 3" Inside Width (Fine Thread), S08 - 1/2" x 3 1/4" Inside Width (Fine Thread), S09 - 1/2" x 3 1/2" Inside Width (Fine Thread), S10 - 1/2" x 3 3/4" Inside Width (Fine Thread), S11 - 1/2" x 4" Inside Width (Fine Thread), S12 - 1/2" x 4 1/4" Inside Width (Fine Thread), S13 - 1/2" x 4 1/2" Inside Width (Fine Thread), S14 - 1/2" x 4 3/4" Inside Width (Fine Thread), S15 - 1/2" x 5" Inside Width (Fine Thread), S16 - 1/2" x 5 1/4" Inside Width (Fine Thread), S17 - 1/2" x 5 1/2" Inside Width (Fine Thread), S18 - 1/2" x 5 3/4" Inside Width (Fine Thread), S19 - 1/2" x 6" Inside Width (Fine Thread), S20 - 1/2" x 6 1/4" Inside Width (Fine Thread), S21 - 1/2" x 6 1/2" Inside Width (Fine Thread).