Semi-Round U-Bolts 3/4" diameter - Grade 8

To Purchase Grade 8 Semi-Round U-Bolts

The chart below provides quick reference to the 3/4" diameter Semi-Round u-bolts we have in stock. Each kit contains:

2 u-bolts
4 washers
4 nuts

Once you find the u-bolt that meets your requirements, click on the 'buy' link to add the u-bolt kit to your cart, and review pricing. On the cart page, specify the number of KITS you would like to purchase, and checkout.

How to Measure U-bolts

Determine the type of bend (Round, Semi-Round, or Square)
Measure the diameter of the Rod ("A")
Measure the distance between the Legs ("B")
Measure the length of the leg ("C")

In the chart below, Part #8-12100K is 3/4" diameter x 3-1/16" wide x 12-3/8" long.

Grade 8 Common Semi-Round U-Bolts - 3/4" Diameter
			Rod		Click for
Part #	Dimension	Bend	Length	Application	Price
8-12100K	3/4 x 3-1/16 x 12-3/8	Semi-Round	28	Ford	Buy
8-12110K	3/4 x 3-1/16 x 14-3/8	Semi-Round	32	Ford	Buy
8-12120K	3/4 x 3-1/16 x 16-3/8	Semi-Round	36	Ford	Buy
8-12130K	3/4 x 3-1/16 x 18-3/8	Semi-Round	40	Ford	Buy
8-12140K	3/4 x 3-1/16 x 20-3/8	Semi-Round	44	Ford	Buy

8-12150K	3/4 x 3-1/16 x 12-1/4	Semi-Round	28	GMC	Buy
8-12155K	3/4 x 3-1/16 x 13-1/4	Semi-Round	30	GMC	Buy
8-12160K	3/4 x 3-1/16 x 14-1/4	Semi-Round	32	GMC	Buy
8-12165K	3/4 x 3-1/16 x 15-1/4	Semi-Round	34	GMC	Buy
8-12170K	3/4 x 3-1/16 x 16-1/4	Semi-Round	36	GMC	Buy
8-12175K	3/4 x 3-1/16 x 17-1/4	Semi-Round	38	GMC	Buy
8-12180K	3/4 x 3-1/16 x 18-1/4	Semi-Round	40	GMC	Buy
8-12185K	3/4 x 3-1/16 x 19-1/4	Semi-Round	42	GMC	Buy
8-12190K	3/4 x 3-1/16 x 20-1/4	Semi-Round	44	GMC	Buy

8-12200K	3/4 x 3-1/2 x 12-1/8	Semi-Round	28	Navistar	Buy
8-12205K	3/4 x 3-1/2 x 13-1/8	Semi-Round	30	Navistar	Buy
8-12210K	3/4 x 3-1/2 x 14-1/8	Semi-Round	32	Navistar	Buy
8-12215K	3/4 x 3-1/2 x 15-1/8	Semi-Round	34	Navistar	Buy
8-12220K	3/4 x 3-1/2 x 16-1/8	Semi-Round	36	Navistar	Buy

8-12230K	3/4 x 4 x 8	Semi-Round	20	Ford	Buy
8-12235K	3/4 x 4 x 9	Semi-Round	22	Ford	Buy
8-12240K	3/4 x 4 x 10	Semi-Round	24	Ford	Buy
8-12245K	3/4 x 4 x 11	Semi-Round	26	Ford	Buy
8-12250K	3/4 x 4 x 12	Semi-Round	28	Ford	Buy
8-12255K	3/4 x 4 x 13	Semi-Round	30	Ford	Buy

8-12260K	3/4 x 4 x 7	Semi-Round	18	Navistar	Buy
8-12270K	3/4 x 4 x 8	Semi-Round	20	Navistar	Buy
8-12275K	3/4 x 4 x 9	Semi-Round	22	Navistar	Buy
8-12280K	3/4 x 4 x 10	Semi-Round	24	Navistar	Buy
8-12285K	3/4 x 4 x 11	Semi-Round	26	Navistar	Buy
8-12290K	3/4 x 4 x 12	Semi-Round	28	Navistar	Buy

Need Custom Bent U-bolts?

Call 1-800-358-4751 for expert advice on U-Bolts. Or send us an email. We're open (Eastern Time Zone):

M-F: 7am - Midnight
Sat: 8am - 1pm

Secure online ordering is available 24 hours a day, 7 days a week.

Threaded Rod & U-bolt Links

About U-Bolts

U-Bolts on many suspensions provide the force necessary to create what is called the center clamp. This provides the permanent tie between not only the spring leaves, but between the spring and spring seat as well. The clamp performs the following functions:

Attach the spring firmly to the axle seat
Prevent leaf breakage through the center bolt section
Prevent center bolt breakage due to shear

U-Bolt Q&A

Q. If I'm replacing a spring, can I re-use the old u-bolts?

A. No, you should never re-use u-bolts. A properly installed U-Bolt stretches a little bit under torque. The results of this small amount of stretching and its effects on the U-Bolt threads and deep nut, lower a used U-Bolt's ability to sustain the required clamping torque.

Q. Is torque important when I tighten u-bolts?

A. You bet it is. The following are a list of common problems resulting from improperly torqued u-bolts:

looseness in seat area
excessive wear on chassis components
possible spring breakage
possible axle slippage and misalignment