McMark
Mar 1 2016, 01:05 PM
900.187.018.02
Hex Head Tapping Screw
B 4,8 x 16
Material: Steel, gold zinc plated
Hex head width across flats: 8mm
Head thickness: 2.93mm
Head is recessed ~0.5mm
Recess diameter ~7mm
Thread pitch: ~1.44mm
Pointed tip, threaded all the way to the tip
McMark
Mar 1 2016, 01:08 PM
Nearest replacement I've found:
Fastenal #0173112
Head is nearly identical, they're slightly longer and the thread pitch is wrong (~2mm). Also, threads are deeper cut.
McMark
Mar 1 2016, 02:31 PM
Apparently still available from Porsche as well.
http://www.stoddard.com/90018701802.html