3/32"
To determine the size of the rounded Allen wrench needed for the task, measure the diameter of the screw head or the hole it fits into. Match this measurement to the corresponding Allen wrench size.
An Allen screw is not likely in that period Pontiac. Try 15 mm regular wrench.
Usually a 1/8 Allen key
To remove a hex screw, you will need a hex key or Allen wrench that matches the size of the screw head. Insert the hex key into the screw head and turn it counterclockwise to loosen and remove the screw.
7mm Allen wrench
The recommended allen wrench size for bike pedals is typically 6mm.
The size of the allen wrench needed for bike pedals is typically 6mm.
To use Park Tool's Allen wrench for bike maintenance, ensure the wrench is the correct size for the bolt or screw you are working on. Insert the wrench fully into the bolt or screw head and turn it in a clockwise direction to tighten or counterclockwise to loosen. Use steady pressure and avoid over-tightening to prevent damage.
The size of the m6 Allen wrench needed for this task is 6 millimeters.
To remove a set screw, use an appropriate size Allen wrench or screwdriver to turn it counterclockwise until it loosens and can be pulled out. Make sure to apply steady pressure and use the correct tool size to avoid stripping the screw.
The recommended allen wrench size for adjusting bike brakes is typically 5mm.
There is no Allen wrench, I believe it is 14 mm open wrench.