Understanding the Difference Between Nut and Bolt_ A Simple Guide (2025)

1. Understanding the Difference Between Nut and Bolt: A Simple Guide (2025) When you look at machines, furniture, or construction equipment, you’ll notice hundreds of tiny metal parts holding everything together. The most important among them are the nut and bolt. Although they always work in pairs, many people are still unsure about the difference between nut and bolt and their types. Let’s break it down in simple words. What Are Nuts and Bolts? A bolt is a long metal fastener with threads and a head on one side. It passes through materials and is secured by a nut, which has internal threads that match the bolt’s threads. Together, they form a strong, reusable connection. If you ever wondered how structures like bridges, cars, or steel furniture stay tightly fixed, it’s because of properly fitted nuts and bolts. Difference Between Nut and Bolt Feature Bolt Nut Shape Usually has a head and threaded body Hexagonal or round with internal threads Function Passes through materials to fasten Locks the bolt securely Threads External (male) Internal (female) Tool Used Spanner or wrench Usually tightened with the same tool Example Hex bolt, Eye bolt Hex nut, Wing nut In short: a bolt joins materials, and a nut secures the bolt. Types of Nut Bolt and Their Uses There are many types of nuts and bolts, and each serves a different purpose.

2. 1. Hex Bolt and Nut (Bolt Sinut ZE): The most common type used in machinery, construction, and fabrication. “Bolt Sinut ZE” refers to zinc-electroplated bolts that are rust-resistant. 2. Carriage Bolt: Used for wood joints, has a rounded head with a square neck. 3. Flange Bolt: Comes with a built-in washer for even pressure distribution. 4. Wing Nut: Can be tightened or loosened easily by hand — no tools required. 5. Eye Bolt: Used for lifting heavy objects; has a loop at one end. Knowing the types of nut bolt helps you select the right fastener for your project. Nut and Bolt Sizes Nut and bolt sizes are usually measured in millimeters (mm). A common way to describe size is: M10 × 1.5 × 50, which means — ● 10 mm diameter, ● 1.5 mm thread pitch, ● 50 mm length. Small bolts like M6 are used in furniture, while large ones like M20 or M30 are used in heavy construction. Nut Bolt Weight Chart and PDF Reference A nut bolt weight chart helps estimate total weight when buying or shipping in bulk. It lists average weights based on size and material.

3. You can find detailed nut bolt weight chart in kg PDF files online that show the weight of MS (Mild Steel), SS (Stainless Steel), and GI (Galvanized Iron) fasteners. This helps in calculating transport cost and inventory accurately. Nut Bolt HSN Code The nut bolt HSN code (and bolt nut HSN code) used for GST and export documentation is 7318 — covering screws, bolts, nuts, and similar iron or steel articles. Knowing the HSN code helps ensure correct tax billing and international trade compliance. Why Understanding Nuts and Bolts Matters Whether you’re a student, technician, or industrial buyer, understanding the difference between nut and bolt saves time and ensures safety. Using the right types of nuts and bolts improves product quality and durability. About Udhhyog Udhhyog is India’s trusted B2B platform for industrial and steel product supply. We help MSMEs buy high-quality materials at competitive prices through a technology-driven platform. We specialize in MS/SS/GI Pipes, Flanges, Pipe Fittings, Valves, Nut Bolts, Cable Trays, Welding Spares, and Safety Items. ?Address: Aggarwal Corporate Heights, 1107, Netaji Subhash Place, Shakurpur, Delhi – 110034 ?Contact: +91 93111 20784 ?Website: https://udhhyog.com