Pololu - Aluminum Standoff: 1/4 Length, 2-56 Thread, M-F (4-Pack)

These hexagonal male-female aluminum standoffs keep parts spaced 0.25" (6 mm) apart and are great for building a multi-level robot chassis. Both ends of these 3/16"-wide standoffs have 2-56 threads. The standoffs are sold in packs of 4.
These hexagonal male-female aluminum standoffs keep parts spaced 0.25 (6 mm) apart and are great for building a multi-level robot chassis. Both ends of these 3/16-wide standoffs have 2-56 threads. The standoffs are sold in packs of 4.

Aluminum Standoff: 1/4 Length, 4-40 Thread, M-F (4-Pack)

Aluminum Standoff: 5/16 Length, 2-56 Thread, F-F (4-Pack)

2-56 Male-Female Threaded 1/4 in. Long Hex Nylon Standoff

Pololu 2091 - Aluminum Standoff: 1/2 Length, 4-40 Thread, F-F (4

Pololu - Maker Faire demo: Simple Motor Controller and Sharp

These hexagonal male-female aluminum standoffs keep parts spaced 1.5 (38 mm) apart and are great for building a multi-level robot chassis. Both ends

Pololu - Aluminum Standoff: 1-1/2 Length, 2-56 Thread, M-F (4-Pack)

Aluminum Standoff: 1 Length, 2-56 Thread, M-F (4-Pack) at MG

2-56 Male-Female Threaded 1/4 in. Long Hex Nylon Standoff

Aluminum Standoff: 3/4 Length, 2-56 Thread, M-F (4-Pack)

Pololu 1943 - Aluminum Standoff: 3/4 Length, 2-56 Thread, M-F (4-Pack)

Pololu - Video: LVBots May 2018 line following competition