Guide complet des types de boulons et leurs applications. Apprenez les boulons hexagonaux, les boulons de carrosserie, les boulons à œil, les boulons en U et les boulons spécialisés.
Hex Bolts: The Most Common Bolt Type
Hex bolts are the most widely used fastener in construction and general applications: DIN 933 / ISO 4017: Full thread hex bolt DIN 931 / ISO 4014: Partial thread hex bolt Key features: - Six-sided head for easy wrench engagement - Can be used with standard hex nuts - Wide range of grades (4.8 to 12.9) - Available in metric and imperial sizes Common applications: - General construction - Machinery assembly - Structural connections - Equipment mounting TradeGo hex bolts are manufactured to DIN 933/ISO 4017 with full traceability and quality documentation.
Carriage Bolts: Round Head Design
Carriage bolts (also called coach bolts) feature a round head with a square collar: DIN 603: Carriage bolt with round head and square collar Key features: - Round head provides smooth, finished appearance - Square collar prevents rotation during installation - Full thread or partial thread options - Typically used with hex nuts Common applications: - Wood frame construction - Furniture assembly - Playground equipment - Agricultural structures - Where smooth head is desired on one side TradeGo carriage bolts are zinc plated or hot-dip galvanized for outdoor use.
Eye Bolts: Lifting and Rigging Applications
Eye bolts feature a loop (eye) at the head for attachment: DIN 580: Eye bolt (collar eye bolt) Eye bolts with continuous eye (forged) Key features: - Provides attachment point for lifting or tie-down - Various configurations: vertical lift, angular lift, shoulder eye - Load ratings clearly marked - Must be installed with matching hardware Common applications: - Lifting operations - Rigging and hoisting - Tie-down and cargo securement - Temporary attachments IMPORTANT: Always use matching nuts and washers. Never exceed rated working load limit.
U-Bolts: Pipe and Tube Clamping
U-bolts are U-shaped with threads on both legs: Standard U-bolts for round pipe/tube Special U-bolts for square profile Heavy duty U-bolts for structural applications Key features: - Designed to clamp around cylindrical objects - Two-hole plate (typically included) for flat surface mounting - Various coatings for corrosion resistance - Often used with rubber-lined to prevent damage Common applications: - Pipe and tube mounting - Exhaust system mounting - Marine applications - Automotive suspension - Structural support for tanks and vessels TradeGo U-bolts are available in carbon steel (zinc or HDG) and stainless steel.