M1-KIT: M1 Mastery Bridge and set of MT Mastery Thimbles
Guitars with an “Adjusto-matic” or “Tune-o-matic” bridge, ie: Thurston Moore Jazzmaster, J. Mascis Jazzmaster, Classic Player Jazzmaster/Jaguar, Kurt Cobain Jaguar/Mustang, etc. This kit for guitars with an “Adjusto-matic” or “Tune-o-matic” bridge includes our M1 Mastery Bridge with standard US mounting posts and a set of two vintage spec MT 303 Stainless Steel thimbles to replace your stock thimbles.
Guitars fitted with AOM/TOM bridges have threaded body thimbles that must be replaced with standard ones in order for our bridge to work. The J Mascis Jazzmaster with a TOM requires drilling holes in the pickguard to accommodate standard Jazzmaster body thimbles.
AOM/TOM style bridges were not originally designed/intended for use on Offset style guitars with vibratos. Post spacing, post size, bushing size and tolerances vary greatly on these mostly Korean made bridges and we do not make threaded style mounting posts as they do not function as well as standard USA style thimbles with our original post design. Korean specs and tolerances are constantly changing and we do not follow Korean made hardware. Our USA spec size, unplated solid stainless thimbles fit the inside diameter of our M1 bridge perfectly but are not drop in replacements for guitars previously fitted with AOM/TOM bridges as AOM/TOM bridges are a completely different design.
AOM bridges require you to dowel and drill for our standard USA thimbles.
REPEAT: We only make one vintage USA spec size thimble, if you currently have a threaded post bridge design on your guitar you will need to convert it to accept our USA spec thimbles. For more information on our thimbles visit our specs page. It is recommended a luthier replace these if you are unfamiliar with the process. It’s not very time consuming.
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