39mm Round U-Bolts

39mm Round Galvanised U-Bolt in Lengths from 100mm to 150mm

39mm Round Galvanised U-Bolt is a sturdy and reliable option for boat trailer and Jet Ski axles.

This U-bolt is made from galvanised steel and is resistant to rust and corrosion.

The U bolt has galvanized nylocks and washers, ensuring a secure and tight fit. Its square shape provides added stability and strength, making it a popular choice for marine applications.

We carry good Premium 39mm Round U-Bolts stocks for immediate Express Dispatch.

U-bolts, washers and nylocks are galvanised against corrosion and are suitable for marine environments.

Further, the 39mm round galvanised Australian U bolt has rolled threads instead of cut threads. Additionally,

• the thread length is 60mm.
• The thread size is 1/2 inch BSW.

39mm U-Bolts lengths

• 100mm x 39mm Round
• 115mm x 39mm Round
• 125mm x 39mm Round
• 140mm x 39mm Round
• 150mm x 39mm Round

Four elements uniquely define any Ubolt, they are:

1. Material type (for example, bright zinc-plated mild steel or galvanised)
2. Thread dimensions (for standard 1/2 inch )
3. Inside diameter (for example, 50 mm – the distance between the legs)
4. Inside height (for example, 125 mm)

Mild steel stretches under load. It is essential that you re-tighten the u-bolts approximately 200 km after installation.

Loose U-bolts cause accidents.

Vibration fatigue can loosen u-bolts if not re-tightened after 300 km.

Excellent article on vibration fatigue here.

How U Bolts Sizes are Measured

Measure from the inside of the U-bolt or the width of the tube.

For example, The 250mm U-Bolt Kit is 250mm when measured from the thread’s tip to the top’s underside.