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Common Materials for Screws & Nuts and How to Choose

Common Materials Carbon Steel Stainless Steel 304 Stainless Steel 316 Alloy Steel (High-Strength) Brass / Copper Aluminum Alloy Features & Applications 1. Carbon Steel Pros: Low cost, high strength, easy to manufacture. Cons: Prone to rust. Common finishes: Zinc-plated, black oxide, color zinc. ...

2026-03-23

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What is the difference between Nominal Diameter and Actual Diameter of a screw?

In simple terms: Nominal Diameter = the "label size" of the screw Diameter (actual) = the real measured thickness People often use them interchangeably in daily speech, but they are technically different. 1. Nominal Diameter This is what we call M-number: M3, M4, M5, M6, etc. It is a standard ...

2026-03-23

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Screw Sizes & Specifications

Screw dimensions mainly depend on three core parameters: thread diameter, pitch, and length, and are classified into three major systems: metric, imperial, and American standard. Below are the most commonly used categories and specifications. I. Core Dimension Parameters (Key to Understanding Model ...

2026-03-23

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