We've tooled up our own custom M5 screws specifically made for mounting ski bindings to swap plates or inserts. The head is flat underneath and fits like a button head screw. The underside of the head has locking serrations to help ensure that the screw doesn't back out over time. High quality stainless steel. For use with a Pozi #3 phillips head screwdriver.
It is very important to maximize the number of threads engaged in an insert or a swap plate, so be sure to measure carefully. Inserts can accommodate from 3mm min to 6mm max of thread engagement. We like to target 4mm of thread engagement. Do not exceed the min/max numbers for any reason - you will not get a secure mount. These screws fit exactly like Allen button heads in terms of length.
Posted by Michael Haugen on 17th Dec 2017
These mounting screws fit the bill. There are visual indications of voids in the material and imperfections in the threads, so they're not of the highest quality like aerospace grade or anything. They assemble fine and I haven't experienced any failures, so the fasteners meet the needs of ski touring.
Posted by Andrew on 15th Jan 2015