This guide looks at DIN 933 bolts, hexagonal fasteners that are German standardised and which now play a vital role in industrial applications globally. It describes how German standardisation creates uniform specifications, enabling various manufacturers to produce compatible parts that function together without issues.
DIN 933 Bolts – What's the Deal?
Look, if you are dealing with older machinery or European equipment, you will run into
DIN 933 bolts. They are basically
fully threaded hex bolts that Germany standardised years ago.
Now everyone uses ISO 4017, but the bolt dimensions are pretty much the same thing.
You can get these in different strengths – 8.8, 10.9, A2-70, A2-80, and SS316 for regular steel – or go stainless if you are worried about rust. They make them from M16 up to the big M64 sizes. Most suppliers have all the technical specs and DIN standard bolt charts if you need to get specific about your project.
Big Bolt Nut offers IN 933 metric bolt dimensions, ranging from smaller sizes up to M64. The "M" number indicates the shaft diameter – for example, M16 means a 16 mm diameter, M20 means 20 mm, and so forth. The larger the number, the thicker and stronger the bolt.
Bolt Size Decoded: Reading bolt sizes is straightforward once you know the system. The first number is always diameter, then comes length. So M20x80 means 20mm thick shaft, 80mm total length. Head size grows proportionally with shaft thickness.
Thread Pitch Simplified: These measures the spacing between thread ridges. Standard M20 bolts use 2.5mm pitch - meaning each complete turn moves the bolt 2.5mm deeper. Fine threads have smaller pitch numbers and grip tighter but take longer to install.
DIN 933 Bolts: Built to Hold Your Projects Together
DIN 933 bolts are a staple in construction and machinery. With their sturdy hexagonal heads and metric threads, they are built for tough jobs—holding everything tightly in place, project after project.
Available in sizes M16 to M64 and in several strong materials, they’re easy to match to any need. Clear
DIN 933 bolt dimension charts make selection simple. These bolts are trusted everywhere from heavy equipment to everyday repairs, keeping things secure and reliable behind the scenes
Why DIN 933 Bolts Still Matter: The Go-To Choice for Strength and Precision
DIN 933 bolts might be an older standard, but they are still widely used and important in many industries today. These full-thread hex bolts come in sizes from
M16 to M64, with detailed specs covering everything from thread pitch to head size. The bolts are made in different strength grades, including strong steel and stainless options, so there’s a fit for almost any job. A key point is that the dimensions for galvanized nuts are measured before coating.
If you are choosing bolts for a project, DIN 933 gives you clear info on sizes, weights, and thread details to make sure you get just the right fit.