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Cam gear bolts


czy18e
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M5 is the diameter of the bolt and does mean a 5mm threaded section. the head is 8mm so you would use a 8mm spanner.

8.8 is the tensile strength of the bolt, it is printed on the head of a metric bolt. It's important you don't buy a replacement with a lower tensile strength.

I don't have one to measure the length handy but from memory they are about 20mm long (from the underside of the head to the end of the thread). If you can't confirm the exact length just screw a bolt in lightly and make sure it tightens the plate/cam gear in place before the thread bottoms out. If it is too long there is no issue cutting it shorter to suit.

So you would buy 8 bolts described as High Tensile (8.8 grade) M5x20mm, for example http://www.ebay.com.au/itm/M5-5MM-HIGH-TENSILE-NUT-BOLT-X10-SETS-M5-X-20MM-ZINC-GOLD-8-8-FREE-POST-/131933153719?hash=item1eb7d429b7:g:Dk8AAOSw8oFX0gMP 

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14 minutes ago, Duncan said:

yeah they are 1.0 pitch. "fine" or "coarse" changes depending on the bolt size, I'm not sure if 1.0 is considered fine or coarse for M7

Coarse is 1.0mm  Fine is 0.75mm

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