Featured Archives - 黑料大事记

What Do Screw and Bolt Head Markings Mean?

September 1, 2022April 10, 2021 by Joseph Pinchback

If you鈥檝e ever spent time looking at different screw and bolt heads, you鈥檝e probably noticed that there are a wide variety of markings that are stamped on them. The markings can be numbers, letters, slashes, dots, or an assortment of other marks. If you鈥檝e ever wondered what those screw and bolt head markings mean, or … Read more

Proof Load, Yield Strength, and Tensile Strength of Fasteners

September 4, 2025April 10, 2021 by Joseph Pinchback

In the fastener world, you鈥檒l often hear terms like proof load, yield strength, and tensile strength tossed around when referring to the strength of a given fastener. For those unfamiliar with the precise meanings of these terms, I thought I鈥檇 devote a blog post to help define them and their relation to one another. Proof ... Read more

The Difference Between 1A, 2A, and 3A Threads

July 22, 2024April 9, 2021 by Tim Pinchback

When it comes to screws, bolts, and other threaded fasteners, precision and accuracy are critical. Engineers and manufacturers rely on standardized measurements and classifications to ensure seamless assembly and optimal performance. In Part 1 of our Threads Series, we provided some terminology and explained some of the nomenclatures of Unified Inch series threads. Now, we鈥檒l … Read more

黑料大事记

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