Understanding Markings and Grades on Nuts and Bolts – Fasteners Plus

When it comes to nuts and bolts, there are many markings that you may come across. Common markers include letters, numbers, dashes, slashes, dots, and many more. The markings are an indication of the fastener's make, material, and dimension.
Why do fasteners have markings? Read more to learn about the different markings bolts, screws, and anchors have and how they can help you.

Guide to bolt grades and applications

Nuts & bolts - Grade

Understanding Metric Bolt & Screw Grades — & Head Markings!

Understanding Markings and Grades on Nuts and Bolts

Hex cap screws are partially threaded and provide much tighter tolerance than their fully threaded counterparts. Hex bolts are the most common

1/2-13 Hex Bolts Grade 5 Zinc Plated Steel 3/4in 7/8in 1in Up to 12in All Sizes

These hex bolts are among the strongest grade of fastener available in steel. These screws are yellow zinc plated and made from steel for durability.

1/4 in. x 1 in. Yellow Zinc Grade 8 Hex Bolt (5 per Bag)

10 x 2 Deck Screws 18-8 Stainless Steel, Square Drive, Type 17

Understanding Fastener Grades & Materials

Understanding Markings and Grades on Nuts and Bolts – Fasteners Plus

Ball Screws for CNC: Easy Guide [Bearing Blocks, and Anti Backlash