Shoulder washers do not fit TO-3P mounting hole. May be suitable for use on the back of a heatsink with a thru-hole screw, but not when the parts are screwed onto a #4-40 threaded heatsink. I can't figure out why the washer size doesn't match the component's hole, as that would allow it to be used on both the part itself and the heatsink. Another well thought out Chinese quality detail. NO. Haven't tried insulators yet but right now I'm worried about this quality.
Realme C31 Smartphone 4/64 GB Dual Nano SIM Dark Green
77 Review
Smartphone Apple iPhone 14 Pro Max 256 GB, Dual nano SIM, deep purple
106 Review
Smartphone Apple iPhone 13 128 GB, nano SIM+eSIM, Alpine green, Slimbox
108 Review
Smartphone Xiaomi Redmi Note 11 Pro 8/128 GB RU, Dual nano SIM, white ice
148 Review