Nuts are crucial fasteners with a threaded hole, used with bolts or screws to secure parts. They are essential in industries like construction, automotive, and manufacturing for creating strong, removable joints.

Types of Nuts:
Hexagon Nuts: Common six-sided nuts for easy grip and torque.
Lock Nuts: Resist loosening from vibration, including nyloc and all-metal types.
Flange Nuts: Have a built-in flange for load distribution.
Wing Nuts: Designed for hand tightening.
Cap Nuts: Domed top for safety and aesthetics.
Materials and Coatings:
Materials include steel, stainless steel, brass, and nylon, with coatings like zinc and galvanization for durability.

Standards:
ISO and DIN standards ensure consistency in dimensions, tolerances, and mechanical properties, covering thread pitch, height, width, and strength grades.

Applications:
Nuts are used with bolts and screws in machinery, vehicles, and structures, ideal for temporary and permanent assemblies, facilitating maintenance and repairs. ISO Standards for Nuts:
ISO 4032: Hexagon Nuts, Style 1 – Product Grades A and B
ISO 4033: Hexagon Nuts, Style 2 – Product Grades A and B
ISO 4034: Hexagon Nuts, Style 1 – Product Grade C
ISO 4035: Hexagon Thin Nuts (Chamfered)
ISO 4036: Hexagon Thin Nuts (Unchamfered)
ISO 8673: Hexagon Nuts with Flange, Style 1
ISO 2320: Prevailing Torque Type Steel Hexagon Nuts – Mechanical and Performance Properties
ISO 7040: Prevailing Torque Type Hexagon Nuts, All-Metal
ISO 7042: Prevailing Torque Type Hexagon Nuts with Non-Metallic Insert
ISO 10511: Thin Nuts (Hexagon Thin Nuts with Non-Metallic Insert)
ISO 10512: Hexagon Nuts, Style 2 – Product Grades A and B
ISO 10513: Hexagon Nuts with Flange, Style 2 – Product Grades A and B
ISO 10663: Hexagon Nuts with Flange and Non-Metallic Insert
ISO 7719: Hexagon Nuts with Metric Fine Pitch Thread
ISO 8674: Hexagon Nuts, Style 1 – Reduced Height
ISO 8675: Hexagon Thin Nuts, All-Metal Prevailing Torque Type
DIN Standards for Nuts:
DIN 934: Hexagon Nuts, Style 1 – Product Grades A and B
DIN 935: Slotted Hexagon Nuts (Castle Nuts)
DIN 936: Hexagon Thin Nuts (Low Type)
DIN 980: All-Metal Prevailing Torque Type Hexagon Nuts
DIN 982: Hexagon Nuts with Nylon Insert (Nyloc Nuts) – Higher Form
DIN 985: Hexagon Nuts with Nylon Insert (Nyloc Nuts)
DIN 1587: Cap Nuts (Dome Nuts)
DIN 315: Wing Nuts
DIN 439: Hexagon Thin Nuts
DIN 6330: High Nuts (Heavy Hex Nuts)
DIN 6923: Hexagon Nuts with Flange
DIN 6927: Hexagon Nuts with Clamping Part (All-Metal)
DIN 6929: Hexagon Nuts with Flange and Nylon Insert
DIN 7967: Self-Locking Hexagon Nuts with Polyamide Insert
DIN 917: Square Nuts