4 Pack 4.5 Inch Heavy Duty Weld‑on Butterfly Hinges

Features: Unlike regular light-duty door hinges, our industrial trailer hinges handle heavy weight and constant daily use. Even under sustained impact, they won't sag or develop wobbly loose gaps as time passes. Butterfly hinge design customized for trailer ramp doors and folding assemblies. The force-dispersing structure handles ramp inclined loads perfectly with enhanced industrial durability. Specifications: Material: steel Color: black Style: classic Department: adult Size: 4.5 x 2.2 inch / 11.4 x 5.6 cm Package includes: 4 x Steel butterfly hinges Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays

• Package Including: Our package comes with 4 pieces of 4.5 x 2.2 inch weld‑on butterfly hinges; Built‑in thick 7/16‑inch solid pin shaft delivers superior load‑bearing performance; It effectively prevents gate sagging, joint loosening and deformation caused by repeated heavy‑duty opening‑closing; These hinges are designed exclusively for weld‑on installation and should not be mounted with screws, making them ideal replacement hardware for heavy metal gates and trailer ramp doors
• Butterfly-shaped Structural Design: The butterfly‑style frame distributes heavy door pressure evenly across the hinge; An integrated bearing sleeve reduces shaft friction to keep the hinge rotating smoothly even after frequent heavy use; This weldable butterfly hinge supports a wide opening angle for smooth, hassle‑free daily operation during farm renovation, trailer repair and industrial installation jobs
• Grease Fitting for Easier Maintenance: Each heavy‑duty butterfly hinge is pre‑fitted with an integrated grease zerk; You can inject lubricant directly into the hinge pin without removing the gate or trailer door; Regular greasing cuts down friction and squeaky noise, extending hinge service life and saving you time‑consuming disassembly maintenance outdoors
• Durable Material: Crafted from high‑strength solid raw steel for superior rigidity and dependable welding compatibility; Its zinc‑plated grease fitting adds anti‑rust protection to slow down surface corrosion, paired with a high‑hardness wear‑resistant hinge pin to cut long‑term abrasion damage; This heavy‑duty weld‑on hinge holds up well against outdoor weather, farm moisture and continuous heavy industrial use
• Wide Use: These weld‑on heavy‑duty hinges are a versatile repair solution for farm gates, metal fence doors, trailer ramp hatches, warehouse gates and custom industrial equipment; These hinges supplies for welders, fence contractors, farm property owners