Measure the outer diameter of the pipe or object you are clamping, then add the thread engagement length needed for your nuts and mounting plate. For example, a pipe with a 20mm OD typically requires a U-bolt with an inner width of approximately 20–22mm. This M6 U-bolt is available in lengths from 14mm (≈9/16") to 114mm (≈4-1/2") to cover a wide range of applications. When in doubt, size up to allow adjustment room.

A2 stainless steel (also known as 304 stainless) is an austenitic grade with a typical tensile strength of around 500–700 MPa and a proof load that generally meets ISO 3506 property class 70 for stainless fasteners. It provides a solid balance of mechanical strength and corrosion resistance for most indoor and moderate outdoor environments.

A2 (304) stainless steel offers good corrosion resistance in most outdoor and mildly corrosive environments. For highly aggressive saltwater or coastal marine applications, A4 (316) stainless is generally recommended. These U-bolts are well-suited for covered outdoor structures, garden installations, and light marine use where direct prolonged saltwater immersion is not expected.

These U-bolts use M6 metric coarse thread (pitch typically 1.0mm), which is compatible with standard M6 hex nuts, flange nuts, and coupling nuts. They conform to ISO metric thread standards and are compatible with DIN 3570 / DIN 529 style U-bolt hardware. M6 nuts are widely available at any hardware store in the US.

For pipe or conduit runs, U-bolts are typically spaced every 4–6 feet (≈1.2–1.8m) depending on pipe diameter and load. For structural or racking applications, one U-bolt per connection point is standard. Ordering in packs of 3, 5, 10, or 15 offers better per-unit value for larger jobs — the 10-pack and 15-pack options are popular for full conduit runs or fabrication projects.

Please refer to the variant options and product listing details to confirm what is included. Typically, round bend U-bolts are sold with two M6 hex nuts per bolt. A mounting plate or bridge plate is generally sold separately. Contact us to confirm inclusions for your selected variant before ordering.

The inner bend width varies by the selected length option. The length dimension listed (e.g., 14mm, 27mm, 60mm) refers to the shank/leg length, not the inner pipe clearance. Please contact us with your required pipe OD and we can confirm which size variant is the correct fit for your application.

Yes, M6 round bend U-bolts are commonly used to secure electrical conduit, EMT, and rigid metal conduit to strut channel, unistrut, or structural supports. The stainless steel construction helps prevent galvanic corrosion when used with aluminum or steel conduit in damp locations — a common requirement in commercial and residential electrical installations.