M4 x 6mm O/D x 4mm Length Spacers - Brass

These are M4 Clearance Inside Diameter spacers / stand off collars with a 6mm Outside Diameter. These are manufactured in-house from Brass using

RS PRO - 2240386 - Round Brass Spacer, Female, Plain Nickel Plated Finish, 6mm L x 3.2mm D - RS

Metric Step Drill - REV Robotics

2MM Threaded M2 Anodized Stack Spacer (5 Pcs.)

300/136 Pcs M2/m3/m4 Hex Brass Copper Pillar Stand Off Hex Column Spacer Screw Nut Fastener Tool Set For Machine Automobile Kit - Screws - AliExpress

M4 x 20.5mm Metal Binder Screw (Female) - Brass Plated Steel

20pcs M3 Male to Female Brass Spacers Long Hexagonal Brass PCB Standoffs Spacers Length 4mm - 60mm - AliExpress

M2 M2.5 M3 M4 M5 Hex Brass Standoff Spacer Hexagon Stand off Copper Pillar Motherboard Column Rack PCB Board Stud Nut Bolt Screw - AliExpress

10/50pc Solid Brass Copper M2 M2.5 M3 M4 Hex Standoff Hexagon Pillar M-F F-F Male-Female Female Spacer for PCB Board Motherboard - AliExpress

M4 Brass Screw Nut Spacers Standoff M3 Brass Spacer Standoff Screw Nut - M2 M2.5 M3 - Aliexpress

M3 Male Female Brass Hex Column Standoff Support Spacer - Temu

RS Pro Nickel Plated Brass Hexagonal Threaded Standoffs From RS Pro a range of robust, high-quality hexagonal shaped standoffs made from nickel plated

RS PRO Brass Hex Standoff, Male/Female, 12mm, M4 x M4