• U bolt size :1/2" D x 3-1/16" W x 5-5/16" L, thread length :2-1/2".u bolts 3 inch wide for 3" x 3" square beams and shafts, (please check the measurements carefully before ordering), perfect for boat trailer shop installation, trailer crane, any boat trailer
• 304 u bolts: square u bolt is made of 304 stainless steel.u-bolts is durable and has standard upgraded thread thread to prevent freezing. ubolt fits perfectly and supports over 100LBS per bolt
• You can get: (4) trailer U-bolts, (8) heavy hex stainless steel nylon lock nuts, (8) flat washers, (8) lock washers. stainless steel bolts and nuts kit are only half the price of the hardware store, with these you can spend less time repairing and more time boating
• Tips: It is recommended to use lubricant during installation to prevent wear. Use a hand wrench or socket ratchet when installing the nut. Do not use a high-speed power tool or impact tool to tighten the nut
• After-sales service: square head bolts has been strictly inspected before leaving the factory, and provides one-year warranty service. If you have any problem, please send email to us through Amazon, and we will solve it for you within 24 hours, don't worry

• Product Dimensions ‏ : ‎ 5.3 x 3 x 0.5 inches; 3.04 Pounds
• Date First Available ‏ : ‎ December 24, 2020
• Manufacturer ‏ : ‎ Foinwer
• Country of Origin ‏ : ‎ China