Unidentified bolts

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Jim Wayman
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Unidentified bolts

#1 Post by Jim Wayman » Fri Apr 08, 2022 10:18 pm

I have had these small bolts for many years and don't know where I got them or what they are for. Maybe someone out there can help identify them. They are M4 X 6MM hex bolts with 7MM across the flats heads. They appear to e cad plated and are drilled for safety wire. They came in a plastic Porsche parts bag.
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Mike Wilson
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Re: Unidentified bolts

#2 Post by Mike Wilson » Fri Apr 08, 2022 11:57 pm

No part number on the bag, Jim?

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Re: Unidentified bolts

#3 Post by Mike Wilson » Sat Apr 09, 2022 12:06 pm

I've been trying to envision where a 4mm bolt would have to be secured with safety wire. I haven't run across one on a 356.

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Re: Unidentified bolts

#4 Post by Jim Wayman » Sat Apr 09, 2022 12:30 pm

No part number
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Re: Unidentified bolts

#5 Post by Pete Indelicato » Sat Apr 09, 2022 12:32 pm

Look like the bolts that hold the brake assembly to the hub on drum brake models--three per side and drilled for wire lacing.
1963 T6 couple #212891, motor #*KD*P*730464

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Re: Unidentified bolts

#6 Post by Mike Wilson » Sat Apr 09, 2022 12:43 pm

Too small for those bolts, Pete. The backing plate bolts are 10mm.

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Re: Unidentified bolts

#7 Post by Mike Wilson » Sat Apr 09, 2022 12:57 pm

Jim, what is stamped on the heads of the bolts, Karro, NSF, Kamax, Verbus, etc.?

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Jim Wayman
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Re: Unidentified bolts

#8 Post by Jim Wayman » Sat Apr 09, 2022 12:58 pm

No marks on heads
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Re: Unidentified bolts

#9 Post by Mike Wilson » Sat Apr 09, 2022 1:48 pm

That's interesting, Jim. I'll check my stash but I don't think I have any original M4 hex head bolts. 4mm is not something I would use for a strong assembly but the safety wire holes may indicate use in a vibration setting. The smallest bolt I have seen on my 356 is a M6 aside from the radio power to radio bracket screws. Darned if I know! Was the Porsche bag sealed?

Brain fart: the hex bolts for the T-6 horn grills are smaller but not safety wired.

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