OK, those are similar to the 560 SL wheels. However, the 560 wheels are 15". The bolts I used on my wheels looked exactly like the bolt pic you posted with the lengthened shoulder. You may want to measure how much thread you have below the ball seat. Then compare against what is available.

FWIW, I put the 15" 560 SL wheels on my '85 380. I don't know if there's a difference in the lug bolt length.

__________________
Rick

'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac