We went DIRECTLY to the same supplier that makes the trems for the big "F", and bought a container full to get a great price.
These mount right onto the factory holes driled by fender® in Mexico, and fit just about every other 10.5mm spaced guitar out ther. Vintage correct bent steel saddles, tapered trem block, vintage style trem arm. So we guarantee this is the identical unit.
Hole spacing for the six case hardened trem screws is EXACT import- Dropped one on my Standard strat, made in Mexico and it fit like BUTTA...
Be sure to screw the trem arm all the way down into the arm hole on the block. The first point of resistance does not mean the arm is fully inserted into the block and could lead to the arm snapping at its weak joint. The threads should not be visible when the arm is inserted correctly.