Club 80-90 Forums

Just buying a replacement - what other fittings do I need to attach it?

err 8mmx25 coach bolt, well screw really. for rider to bumper and as it will be a bit tender i would go with an m6 x about 50mm bolt or setscrew + nut with pozi or slotted end to secure to body oh and a washer as well
mm

metalmick8y wrote:err 8mmx25 coach bolt, well screw really. for rider to bumper and as it will be a bit tender i would go with an m6 x about 50mm bolt or setscrew + nut with pozi or slotted end to secure to body oh and a washer as well
mm

Cheers mate

metalmick8y wrote: coach bolt, well screw really
mm

I think bolt is right because it can't rotate the nut has to turn which is hard to get to behind the bumper.
Screws fit into fixed things. Bolts have nuts that turn. Funny that the same part could be a bolt or a screw depending upon application.

Actually no. A bolt has an length of unthreaded shank. ,in this instance I was referring to a screw as in setscrew hence threaded for its entire length and coach bolt as a description of a domed head with sguared shank under to resist rotation lol
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metalmick8y wrote:Actually no. A bolt has an length of unthreaded shank. ,in this instance I was referring to a screw as in setscrew hence threaded for its entire length and coach bolt as a description of a domed head with sguared shank under to resist rotation lol
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^^ That's what I always understood was the difference between a screw and a bolt - screw fredded all the way, bolt's got a bit of plain shank.

metalmick8y wrote:Actually no. A bolt has an length of unthreaded shank. ,in this instance I was referring to a screw as in setscrew hence threaded for its entire length and coach bolt as a description of a domed head with sguared shank under to resist rotation lol
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I always thought that but It appears not everybody agrees with that definition, the purpose definition is apparently common.

https://en.m.wikipedia.org/wiki/Bolt_(fastener)

I don't think this is a bolt.

You can add to that the old 'M13 bolt' ... it's NOT an M13 bolt, it's an M8 bolt .. a threaded 8mm diameter round bar with whatever type of head.

In a past life designing injection moulds I must have specified and drawn thousands of cap head screws. Going back about 35 years, I remember a discussion/argument in the drawing office as to what was a screw or a bolt. We agreed that a screw engages with a tapped hole, bolts are used with a nut. It depends on how the screw is used, a cap head screw can be used with a nut, then it becomes a bolt.

Nuts and bolts or screws.

sort of agree, a screw is just that, a screw, it doesnt become a bolt ever... even if you screw 6 nuts to it, perhaps i should have said set screw, a bolt always should have a length of unthreaded shank and so will always remain a bolt
so
hex head/cap head whatever head if it has an area of unthreaded shank its a bolt
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A setscrew doesn't normally have a head, it can't be used as a bolt. It locks something, not holds anything together.

I don't think the length of thread/unthreaded portion dictates what defines a screw or bolt.

tobydog wrote:A setscrew doesn't normally have a head,

They do round here. A setscrew without a head is a grubscrew (most have a milled end to grip into a shaft or similar)

Ian

http://emped-engineeringinfo.blogspot.c ... screw.html" onclick="window.open(this.href);return false;
aye ,me screws round here all have heads , whereas a threaded rod thats lost its head is a "grub screw)

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I always thought set screws had a slot in one one where as a grub screw had a hex in and not a slot, but neither have heads

Go into a fixings supplier and you will get what you ask for, according to the accepted definitions!

The design of the head has no bearing on the name, its all about whether it has any amount of plain shank.

Hex or cap head, bolt or screw.
This only applies to engineering fixings!

Coach "bolts" have their own standards, along with woodscrews ...