Quote:
Originally posted by bd1308
how can a 12 point anything have 90 degree corners? pics anyone? i thought the sum of the angles had to equal 360 degrees?
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Nope--only in a convex shape. Concave shapes can sum to much larger angles.
Try this exercise. Cut out three square pieces of paper, all the same size. Stack them on top of each other. Rotate the top two clockwise by 30 degrees (one-third of the 90 degrees of a right angle). Now rotate the top one by another 30 degrees.
If you trace the outside edge of the shape made by all three pieces of paper, you will have a "triple square" shape, which is the shape of the recess in the stock CV joint bolts.
...VW Bug shops can be good sources of tools and parts for our cars. (911s too.) You can stop in at one and get "the CV joint socket" and "the transmission socket", and you'll wind up with the M8 triple-square for our CV joints and the 17mm Allen socket for our transmission drain and fill plugs. The Bug and the early 911 use the same fasteners as us.
N.B., the M8 triple square bolts are also used to hold the fan onto the fan hub of some 914s. Others use conventional (external hex) bolts.
--DD