I don't have a datasheet on those but it should be easy to find.

If you don't have retainers for the top, be sure to do something on the bottom of the injector to keep it from falling out of the fuel rail. An extra o-ring can work, or you can do something like this with stainless steel lock washers.

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They absolutely have to be good quality stainless - non-ferrous (check with a magnet) or they can alter the injector's characteristics.