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What bolts should I use on a boat trailer?
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1/2″ Galvanized Straight Bolts Galvanized straight bolts are a great investment for your boat trailer. Hot dipped galvanized bolts provides maximum corrosion resistance in salt water environments is can be used for installing bunk board brackets,
What bolts should I use on a boat trailer? – Related Questions
How tight should Trailer U-bolts be?
Helpful Expert Reply: If the U-bolts are 9/16 inch diameter, the torque specs should be between 65 to 95 foot lbs. If the U-bolts are 3/8 inch diameter, the torque should be between 30 and 50 foot lbs.
“If you overtighten the nuts on those u-bolts you can damage the bearing cap and the needle bearings inside,” says Fagen. “A lot of needle bearing failures in u-joint caps can be traced to over-tightened u-bolts.
How tight should U joints be?
New U-Joints Should Feel Pretty Stiff When Moved By Hand
That means they should move freely in both axis. Yet, it’s normal for a new u-joint to feel pretty firm when you move it by hand, even when it is thoroughly greased.
How can you tell the difference between Grade 5 and Grade 8 U-bolts?
U-bolts from 3/8 to 9/16 diameter are Grade 5, while 5/8 to 1 1/4 diameter are Grade 8.
What is the torque spec for U-bolts?
Recommended U-Bolt Torque for Cold-Formed U-Bolts
Size
Material Grade
Max. Torque Ft. Lbs. Unplated
7/16 – 20
5
44
1/2 – 20
5
70
9/16 – 18
5
100
5/8 – 18
8
177
How tight should leaf spring U-bolts be?
Why would u-bolts have to be tightened correctly?
centre bolts hold the spring together for assembly and help locate the spring onto the axle in the correct position. Correctly tightened ubolts are what holds the springs firmly in place on the vehicle when driving.
Is it OK to reuse leaf spring U-bolts?
How tight should spring shackle bolts be?
Tightening the shackle bolts too much will squeeze the shackle straps against the leaf springs and the whole suspension system will bind and cause problems. The best thing to do when tightening down shackle bolts is to use lock nuts and tighten them until they are snug and then backed off 1/4 turn.
Spring Eye Bolts, Grade 8, Should Be The ONLY Spring Eye Bolt/Shackle Bolt used due to the increased strength and torqueing ability needed when installing your Leaf Spring Suspension.
Are shackle bolts supposed to be tight?
Expert Reply: We recommend that shackle bolts be tightened fully, then backed off slightly to allow free movement. For the distance between the center of the axles 30 inches is the recommended distance to use with a 26 inch long leaf spring similar to the # SP-212275.
How much do I torque leaf springs?
A 1/2 inch diameter bolts should be torqued between 45 ft/lbs and 70 ft/lbs. A 9/16 inch diameter bolt should be torqued between 65 ft/lbs and 95 ft/lbs and a 5/8 inch diameter bolt should be torqued between 100 ft/lbs and 120 ft/lbs. I have attached two FAQ articles on trailer suspension for you to check out.
Do you need to torque leaf springs?
Remember, torque your bolts to the recommended specifications immediately upon installation, and re-torque the U-bolts after 50 miles.and then again after 500 miles. And heck, it’s a good idea to check them every time you’re underneath your vehicle.
What is the torque on a 3/4 U-bolt?
I spoke with the manufacturer and they recommend using 160 ft-lb for the torque spec on a 3/4 inch U-bolt # 11-70.
How Do You Measure U-bolt size?
The length (L) is measured from end of bolt to inside of the bend, while the width (C) is measured between the legs. Some companies will show the length to the bottom or centerline of the bend instead of the top of the bend. The width is sometimes detailed as center of one leg to center of the other leg.
What are the types of u bolts? U bolts are commonly classified by bending shape and can be divided into round U bolts, semi-round U bolt, and square U bolt. Each of the three models can be made of corrosion-resistant metals, such as carbon steel, 304 stainless steel, or 316 stainless steel.