1U Rack Mount Stand for Intel NUC 5 Version NUC5I3RYK with 3 Keystone Support
and cable fixing
on the side there are 2 holes for Brass Insert Knurled Nut  ( https://it.aliexpress.com/item/1005002870937546.html?spm=a2g0o.order_list.order_list_main.80.6cae3696NtwMG8&gatewayAdapt=glo2ita )

Also compatible with i5 and i7 versions without SSD slot

You will find other modular accessories in my profile such as side stand or other rack supports for Intel Nuc

Rackmount Lateral Support: https://makerworld.com/en/models/512585#profileId-428656