Here is a possible lead-in for the Tech Tip

What are those odd screws that have an hour-glass indentation on their heads? Some people swear that these screws rust and break more readily than standard screws.

These screws are called clutch head screws, and they rust and break no more readily than any other type of screws made out of the same metal. However, with the correct driver head, screws with a clutch head are in fact more easily installed and removed.

The clutch head screw was introduced by American Screw & Bolt and 5 different sizes (supposedly ?) were used : 1/8", 5/32", 3/16", 1/4", 5/16".

[insert magazine advertisement at link in my previous post]

etc

etc



A link to the following Tech Tips might be nice:

bolt and screw removal

clutch head screw removal

"bowtie" (clutch head) screws are often found on RVs

removing a broken bolt

It might also be helpful show links to catalogs/companies that sell these screws in various sizes. Here is a start:

Chevs of the 40s

Classic Parts

Restoration Specialties - in Clutch Head Screws & Accessories

others?

Last edited by tclederman; 04/23/2011 5:05 PM.
Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.