I am drawing a HHCS and am stuck at the grade markings. No where are there dimensions of the markings themselves. Does one just draw them free hand so they look close?
Thinking the true dimension sizes would vary per manufacturer.
ASTM, SAE and ISO Grade Markings for Steel Fasteners - American Fastener Technologies Corporation
This is readily available on the internet, however, it doesn't give the dimensions of the markings themselves.
I wasn't really clear with my comment... I would venture to guess that each manufacturer has their own set of dies that produce the markings, therefore it wouldn't be an ISO or ANSI requirement to have them all exactly the same, therefore no known dimensions. I have sent you the link for a reference only, not for dimensions. So, I don't think it would be wrong to draw them by hand, but do it in a way that the lines or letters are scaled with the head size.
Why are you drawing that? Do you have tool box? If yes you can use the models from there. If not then there are many sites you can download it from there like McMaster-Carr, 3dContentCentral,
Yes, I have toolbox. I need to learn how to draw them before I use short cuts. I would have appreciated an answer rather than having to defend my request.
Didn't wanted to offend but I would suggest you to spend time on something more useful. These stuff/components are freely available and one should not spend time modelling them unless you're manufacturing them.
With that said, I have never seen dimension of the marking. So you if you want to make them, pick a bolt/screw and measure
Kathy, I think what we all mean by Why? is that seeing these bolts used in an assembly really causes a lot of overhead in the amount of time it takes to show these bolts with all the text surfaces. Threads, too, take a lot of time to rebuild and show.
Welcome to the forum. I doubt if there are standard measurements available for the grade markings. I suppose you could get a bolt and physically measure them, which I would think would be good enough. But I have to agree with Deepak. Why do you need that much detail on your bolts? It's customary to call out the grade with a note or custom property. Many people reading the drawings wouldn't know what the grade markings mean anyway.
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