Strut Top Mount Serration Fastener

[womble]

Hi All,

I'm helping a small local tuning company develop some aftermarket strut top mounts for a european (UK) car. They are very similar to aftermarket ones by Tein, HKS, etc. as shown below.

I'm looking for a supplier for the serration bolts (If that is what they're called) that can be pressed into the mount to allow it to be bolted to the chassis. I've done a lot of searching on the internet but haven't came up with any suppliers names apart from Boesner in Germany. The serration bolts in the stock mounts are M8x1.25 with a ~16mm thread length. The flat head is ~15mm diameter and 2.5mm thick. Ideally I'd like a supplier in the UK. I also have a couple of questions regarding these fasteners...

1. What is the proper name for these fasteners and do they have a related standard for their design?
2. Are these generally made to suit the OEM, there are no "stock" sizes?

Hope you guys can help,

Stef

 

[CoryPad]

These parts typically are made for a specific application so they are not "stock" items.

The feature is called by different names, such as serrations or splines.

ANY manufacturer of automotive fasteners could make these parts. Boesner is part of Textron Fastening Systems, the world's largest fastener supplier. Other large European fastener suppliers include Kamax and Nedschroef.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[womble]

Thanks Cory. I'll contact a couple of manufacturers. As it's a low volume product, I may end up having to use a different solution.

Thanks again,

Stef

 

[Tmoose]

McMaster Carr has some Grade 2 "ribbed neck" bolts in inch sizes.
"press-in captive studs"
"weld studs"
"captive nuts"
"bolt retainers"
"push nuts"
"speed nuts"

If they were 12 mm I'd be looking at wheel lug bolts to steal.

The LOCTITE gang might have a retaining compound that was useful.

 

[GregLocock]

Why not use a weld-bolt?

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[CoryPad]

Greg,

Typical reasons not to for applications like this include:

1) desire for high strength steels (fastener and mating components) that are not fusion-weldable without post weld heat treatment

2) desire for some disassembly/reusability of the joint members

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.