Male Plain Studs M4/B30 & 316-M4/B30 crafted by BigHead, are available at Hall-Fast and here is our list of sizes. Fixings are manufactured here in the United Kingdom to the highest quality you desire.
The thread size for the metal fastener is M4 and has a length spanning from 12mm to 50mm and is available in either mild or stainless steel.
BigHead products achieve a secure lock onto a surface gained by several methods of attachment, either adhesives or welding and other manufacturing methods can be used.
At Hall-Fast we supply a range of BigHead Fixings, have a browse of the full range.