Hexagon Flange Nuts: A Comprehensive Guide to Metal Lock Nuts and Slotted Nuts- Jiaxing Chengyue International Trade Co., Ltd

Hexagon Flange Nuts: A Comprehensive Guide to Metal Lock Nuts and Slotted Nuts

15 . May . 2025

Hexagon flange nuts, metal lock nuts, and slotted nuts are essential fasteners used across various industries, including automotive, construction, and machinery. Each type has unique features that make it suitable for specific applications.

ASME/ANSI Stainless Steel Hexagon Slotted Nuts

Hexagon Flange Nuts: Features and Benefits

Hexagon flange nuts are characterized by their built-in washer-like flange, which distributes pressure and prevents loosening under vibration.

Key Features:
Integrated Flange: Eliminates the need for a separate washer.
Wide Bearing Surface: Reduces surface damage and improves load distribution.
Common Materials: Carbon steel, stainless steel, and brass.
Standard Sizes: M4 to M24 (metric) or #6 to 1" (imperial).

Applications:
Automotive assemblies
Structural steel connections
Heavy machinery

Comparison with Metal Lock Nuts and Slotted Nuts

Feature	Hexagon Flange Nuts	Metal Lock Nuts	Slotted Nuts
Locking Mechanism	Flange distributes load	Nylon insert or deformed threads	Castellated top for cotter pins
Vibration Resistance	Good	Excellent	Moderate
Reusability	High	Limited (nylon insert wears out)	Moderate
Installation Speed	Fast (no separate washer)	Moderate	Requires cotter pin
Common Applications	General fastening	High-vibration environments	Shaft and axle securing

Metal Lock Nuts: Enhanced Vibration Resistance

Metal lock nuts use a nylon insert or deformed threads to prevent loosening. They are ideal for high-vibration environments but may have limited reusability.