I just asked this question the other day. As recommended here, I bought some Schallers and they were totally compatible with the Fender hardware. Just attach strip and put on the guitar. DONE. NO MODS.

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"I'm not going to make a living at this, but it sure is fun."

Guitars:
1997 American Deluxe Series LoneStar Strat
1999 American Standard Tele
1990 Gibson J-200 (European Maple/Sycamore body)

Amps:
Traynor YCV40WR

Schallers, absolutely. I have a very basic leather strap from Musician's Friend, after about two months the bottom hole was stretched enough where it came off a few times while playing. I put the Schallers on, no problems since. I now have them on both my Tele and Strat. I kept the original strap buttons for if I ever want to switch back, but I don't see that happening.

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2007 MIM Sunburst Standard Tele
2000 MIM Sunburst Standard Strat
1978 Fender SF Twin Reverb
1978 Ibanez PT-909 phaser
2011 Digitech DigiDelay
2011 Digitech Screamin' Blues OD

Is it my imagination or did my American Deluxe Telecaster come with the Schaller buttons installed? My wife has a MIM Strat that has flared strap buttons, as does my son's Squire Strat. My Tele has buttons that seem just like the ones in the Musician's Friend image. It looks like I could buy the parts for my strap and just lock it on!

Premium bound alder body
Deluxe modern C-shaped neck shape with satin finish and comfortable, hand-rolled edges
Stainless steel bridge with chrome-plated brass saddles
2 Fender SCN (Samarium Cobalt Noiseless)
S-1 switching system
Fender/Schaller deluxe staggered cast/sealed tuning machines
Classic knurled chrome knobs
Abalone dot position inlays
Bound top
Contoured back
Highly detailed fret and nut work
22 medium-jumbo frets
Schaller strap-lock ready <<==============

Apparently so,

Its not your imagination. The buttons on my 1999 American Standard Tele are exactly the same as the Schaller buttons. I have the same ones on my 1997 American Strat.

Stock Fender hardware.


A couple with the Schaller installed. You can see where the strap lock slides over the button and locks into place on the center of the button. Sorry my start got in the way a little.







I dropped the buttons that came with the strap locks into my parts bin.

_________________
"I'm not going to make a living at this, but it sure is fun."

Guitars:
1997 American Deluxe Series LoneStar Strat
1999 American Standard Tele
1990 Gibson J-200 (European Maple/Sycamore body)

Amps:
Traynor YCV40WR

+1 here. Only problem i'm facing right now is that the screws on my les paul are much larger and won't fit in the schaller button holes!

When holes get stripped in the wood, I have heard of people (and myself) using toothpicks, putting them into the holes with a little glue, and then installing the new screws. I have done this on lighter guitars and never had problems before. Of course I have never done it with an expensive guitar like a Gibson, but concept should be the same. Just an idea

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RK

2007 Fender Highway 1
2012 American Deluxe
2015 MIM Dave Murray HHH
2010 Fender Blacktop
1987 Fender Avalon Acoustic
2012 Marshall DSL 15 watt head

Fender has installed Schallers on numerous models for many years... I've got Strats from the 80's and 90's that came with them.

Fender also sells them in their own (Fender branded) accessory line... and typically they sell for a couple of dollars less in the stores/on-lines than the packages with the Schaller name on them... However, they are the exact same pieces.