OBO BETTERMANN FRS 10x20 F Flat Round Head Carriage Bolt M10 x 20 mm Stainless Steel A2 6407471

When standard bolts loosen under vibration or pull through soft materials, a carriage bolt with a square neck provides the answer. The OBO BETTERMANN FRS 10x20 F is a flat round head carriage bolt designed to stay put in wood and metal assemblies, preventing rotation during tightening and delivering a clean, low-profile finish.

Who is it for

This bolt suits electricians, metalworkers, and general contractors who need a reliable fastener for structural connections, panel mounting, or timber framing. Its stainless steel construction makes it ideal for environments where corrosion resistance is required.

Main features

• Flat round head for a smooth, finished appearance
• Square neck locks into the material to prevent spinning
• M10 metric coarse thread for strong holding power
• Stainless steel A2-70 for high corrosion resistance
• Length under head: 20 mm

Specifications

• Brand: OBO BETTERMANN
• Model: FRS 10x20 F
• MPN: 6407471
• EAN: 4012196201730
• Fastener Type: Bolt
• Thread Diameter: M10
• Thread Pitch: 1.5 mm
• Length: 20 mm
• Material: Stainless Steel A2
• Material Grade: A2-70
• Head Type: Flat Round Head
• Head Diameter: 24.65 mm
• Head Height: 5.5 mm
• Square Neck Size: 10.4 mm
• Thread Type: Metric Coarse Thread
• Drive Type: Square Neck
• Finish: Plain
• Quantity Per Pack: 1 piece

Tips

Pre-drill a hole matching the square neck dimensions to ensure a secure fit. Use a washer under the nut to distribute load and prevent damage to the mating surface.