Nylon Hex Standoff F-F M4x40mm (10-Pack) - ProtoSupplies

Nylon standoffs are useful for permanently mounting circuit boards or to serve as feet. F/F standoffs accept screws from both ends.
Non-conductive with female/female M4 threads

ProtoSupplies

M2 Nylon Hex Standoff Spacer Screw Nut Assortment Kit (150 Pieces)

Project System for Teensy 4.1 Acrylic Enclosure - ProtoSupplies

Standoff M3 Aluminium Hex 5mm x 30mm Black (4 Pack) - ImpulseRC

1501 Series M4 x 0.7mm Standoff (6mm OD, 24mm Length) - 4 Pack

Male Female Nylon Hex Standoff Assortment Kit with Plastic Screws

1516 Series 8mm REX Standoff (M4 x 0.7mm Threads, 80mm Length) - 4

The 27mm length, M4-threaded, 8mm REX™ Standoff provides clearance, adjusts distances between parallel parts, and reinforces structures. You can also

1516 Series 8mm REX™ Standoff (M4 x 0.7mm Threads, 27mm Length) - 4 Pack

New M4 Anodized Black Aluminum Hex Standoff/Spacer 30pcs/Bag (M4X7.0X30mm, Hex): : Industrial & Scientific