Savage Anschutz 64 trigger adjustment

[PaulB]

I am trying to adjust several Savage Anschutz 64 triggers, probably 1970's or early 80's vintage. There is an adjustment screw in front of the trigger and one behind the trigger. The front adjusts the trigger stop and the rear is for the sear engagement ( I am pretty sure). Both are locked in place by nuts. These nuts are so small and thin that they are difficult to turn with something like needle nose pliers. Also a little challenging trying to measure them with a set of calipers. I am trying to find out their actual size. Don't know if they are SAE or Metric. They appear to be either 7/32" or 5.5mm but I can't get either of these wrenches or nut drivers to fit, and 6mm seems too big. Any ideas or suggestions?

[TenMetrePeter]

make a spanner from a strip of scrap steel or large screw driver blade. Saw out a 5mm shape. File it til it fits.

[MarkTrew]

Being made in Germany, you can bet the farm it is metric. A 5.5mm wrench is almost a whole $6. from Lowe's, assuming you are in the US. If you measure with calipers and add a few thousandths and convert.

Filing a piece, well, I guess you could save, if your time is worth nothing to you?

[PaulB]

They are 5.5 mm. The nuts I am dealing with are somewhat rounded off due to someone using the wrong tool on them. There is also not much room and whatever tool one uses better have nice sharp 90 degree edges and if using an open end or closed end wrench it needs to be pretty thin.

[Bob Smalser]

There isn't enough room to fit a wrench conventionally. I prefer a 4" Crescent used nose first. If someone has used Locktite or nail polish on them, touch an electric soldering iron to them, first and warm them up. Be sure to acquire a quality wrench with hard jaws that run parallel.