Hi, I would like to ask what is the size (diameter and length) of the 2 hex screws that hold the knobs in place.

Thanks in advance!

Don't know the length of the screws but here is the info I copied and saved from one of Mica's posts about the tools needed to work on Alembic instruments, it includes the sizes of the hex screws for the various knobs. If you have a 1/16" hex driver you can remove one of the screws to check the length.

For general adjustments:

truss rods: 1/4" wrench

nut height: 5/64" hex driver
bridge height: 5/64" hex driver
intonation: 7/64" hex driver, ball end recommended
intonation for concealed hardware guitar bridges after 2010: 3/32" hex driver

hat knob: 1/16" hex driver
pickup selector/CVQ knob: .050" hex driver
collet knobs: 6mm nut driver or blade screwdriver

springless pickup height: #0 phillips screwdriver (Xcelite P12SV)
note: several Xcelite #1 will fit, other makers' #1 may not
spring-mounted pickup height: 3/32"

trimpots: 1/8" blade screwdriver (Xcelite R181V)


These tools would only be needed for repairs:

pots: 1/2" nut driver
stereo jack: 12mm nut driver
Q-switches: 5/16" nut driver
note: Xcelite and Snap-On make hollow shaft type that work best
rotary switch: 5/16" or 3/8" nut driver

bridge aircraft fasteners: 5/32"

Gotoh bass tuners: 15mm
Schaller bass tuners: 13mm
Gotoh or Schaller guitar tuner: 10mm

(Message edited by mica on March 26, 2007)

(Message edited by mica on February 16, 2011)

I think it's a 1/8" set screw.

Excellent thanks! I tried searching the must read and FAQ before posting but must have missed this article.