Mechanical connection under load
A threaded U-shaped bolt that clamps components together. Use it to hold crossarms against posts and secure wire to attachment points, keeping position and alignment steady as your trellis carries seasonal load.
Trellising Accessories
U Bolt
U Bolts are 1/4 inch zinc-plated fasteners that clamp crossarms to posts and anchor wires to attachment points across every trellis system you build. The arms span the component width, and the nut draws them together under load to hold the connection rigid as wire tension and canopy weight shift through the season. Specify material and the quantity you need.
At a glance
U Bolt at a glance.
Crossarm and wire attachment
You'll use it across every vineyard and orchard trellis system: fastening wire to posts in vertical systems (VSP, Scott-Henry, Lyre), clamping crossarms in table-grape and kiwifruit systems, and positioning components in multi-wire configurations.
Size and material
1/4 inch diameter, zinc-plated for corrosion protection. Threads and fit are standardized to match Corona post dimensions and wire attachment hardware.
Also known as
Clamps components under load
Position the U bolt around the post or attachment point, thread the bolt ends through the nut, and tighten. The arms span the component width and the nut draws them together, locking the connection against movement as wire tension and seasonal canopy weight shift the trellis. Zinc plating protects the joint from corrosion in wet climates.
Common applications
Where it is used.
Wire fastening to vertical posts
Secure wire levels to your line posts and end posts in single-wire systems (VSP, Single High Wire) and multi-wire systems (Scott-Henry, GDC) where you need multiple attachment heights.
Crossarm clamping in multi-tier systems
Attach crossarm assemblies to posts in table-grape T-trellis, raisin DOV, and kiwifruit T-bar configurations, holding horizontal canopy levels rigid against lateral load.
Post assembly and component integration
Connect bracing components, finishing caps, and auxiliary attachments to your post structures in espalier and specialty systems.
Fastening hardware across every vineyard and orchard system
You'll find U bolts in every trellis system you build: vertical VSP and Scott-Henry systems use them to anchor wire; crossarm systems use them to clamp components; orchard systems use them for wire and training-rod attachment.
Explore vineyard & orchard systems ↗U Bolt specifications
U Bolt configuration
ParameterUS / PrimaryMetric / Additional
Diameter1/4 in6 mm
FinishZinc platedZinc plated
Vineyard & Orchard Trellising
Related components
Posts & trellising
Rolled Edge Vertical Line Post
Thickness: 12 G, 13 G, 14 G / 2.5, 2.3, 2.0 mm · Length: 7-18 ft / 2-6 m
Specifications
Posts & trellising
Flat-Edge Vertical Line Post
Thickness: 12 G, 13 G, 14 G / 2.5, 2.3, 2.0 mm · Length: 7-18 ft / 2-6 m
Specifications
Posts & trellising
Cross Arms
Thickness: 12 G, 13 G, 14 G / 2.5, 2.3, 2.0 mm · Length: 6-72 in / 150-1800 mm
Specifications