Coolbank M5A1 Stuart & M8 Howitzer

[Xiaoshan_Sailor]

For those wondering what it should look like from the factory. Given bolts M3x10 bolts cost $0.01 locally from my sources, I question why not do it right from the start?

Seems that Crusader may have had an assist from someone's 3DP files here on the website just like the Churchill that TD released. Funny how China works, eh?

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[Herr Dr. Professor]

This is helpful, Sailor! I appreciate that you indicate the exact size M3x10 bolts and even give a source for the hardware. I believe I have some of those bolts on hand, but if not, I should be able to get them even here in the U.S. Thank you.

[tankme]

This is helpful, Sailor! I appreciate that you indicate the exact size M3x10 bolts and even give a source for the hardware. I believe I have some of those bolts on hand, but if not, I should be able to get them even here in the U.S. Thank you.

The M3 x 30mm for the rear idler is harder to find in the US, but if you search on "DIN933" or "DIN 933" it becomes much easier as those are the specs for hexagonal machine screws/bolts.

[ColemanCollector]

Aliexpress has both the m3 10mm and 30mm for a cheap price. Such an easy change that makes a huge difference. I had them in a week to Canada.

Mike.

[tankme]

Aliexpress has both the m3 10mm and 30mm for a cheap price. Such an easy change that makes a huge difference. I had them in a week to Canada.

Mike.

Yeah, I just ordered a bunch of different length M3 bolts from AliExpress. Needed to restock on my hex head M1.6 bolts too after bolting on the fenders on the 1/6th KV-1. I usually go to Ali when I don't need them fast.

[Herr Dr. Professor]

Thank you for the tips on hardware sources, gentlemen. Regarding "DIN933" or "DIN 933": I am not familiar with those hardware designations. (I can easily look them up to learn more.) I am more used to the markings that indicate degree of hardening. Forty years ago, as I was laboring over the Piled high and Deep, for a break (???) each day I read all of the John Deere textbooks intended for technical school agricultural programs. ? You bet!

[Tiger6]

DIN 933 is an older German (Deutsche Industrienorm) standard for fully theaded hex head bolts, nothing magical about it.

[Herr Dr. Professor]

So you seem to be implying, Tiger6, that TankMe is "an older German."

[Tiger6]

Or maybe I have worked for a German speaking company for a long while...?

[Son of a gun-ner]

This is helpful, Sailor! I appreciate that you indicate the exact size M3x10 bolts and even give a source for the hardware. I believe I have some of those bolts on hand, but if not, I should be able to get them even here in the U.S. Thank you.

The M3 x 30mm for the rear idler is harder to find in the US, but if you search on "DIN933" or "DIN 933" it becomes much easier as those are the specs for hexagonal machine screws/bolts.

Although DIN is still in use, it was superseded many years ago by the ISO industry standard. Therefore, when looking for hexagonal headed set/machine screws (threaded the whole length). Look out for DIN 933 or ISO 4017.
For hexagonal headed bolts (partially threaded shank), look for DIN 931 or ISO 4014
.

DIN 933 is an older German (Deutsche Industrienorm) standard for fully theaded hex head bolts, nothing magical about it.

Not sure where you got your information.. But DIN has always been since 1917, "Deutsches Institut für Normung" which means German Institute for Standardization. Going on what Philips Industries taught me in the 70's.
Which was introduced for the standardisation of metric machine threads of all sizes no matter the fastener type or amount of threading.
Edit to mention. The i in ISO means international. ISO is basically those German DIN standards on steroids and introduced internationally.
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And while we're on the subject of screws/bolts. These standardisation numbers above have NOTHING to do with cap headed screws or bolts that some non European manufacturers would have you believe. Therefore, be careful when ordering, because some places mention the hexagonal key size to further complicate things along with the wrong fastener type standardisation numbers.
DIN 912, ISO 4762 are for cap headed set screws. In other words, each fastener type has a different number in either standard.
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And just for an extra warning. Not many bolts are hardened, a lot are toughened (still hard enough to blunt hacksaws), most are'nt that tough. Therefore, when replacing bolts on your car, never pop to your local DIY store for replacements or order from iffy cheap online sellers, they are not strong enough.