These parts have no Porsche part number. They are used to replace corroded bolts in:
PET '65-69 911, Fig. 8-09-11, #03 901.731.111.00 Door mirror, -'67 Qty: 1
PET '65-69 911, Fig. 8-09-11, #03 901.731.111.01 Door mirror, '68- Qty: 1

Material: Stainless steel, 316
Finish: Ra 12µm (As machined)
Weight: 5.43 grams

The price is $11.58 per bolt. Shipping within the US is by USPS Priority ($8.30).
International shipping is available, but past performance has been poor, requiring the purchase of insurance.