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

These hexagonal male-female aluminum standoffs keep parts spaced 1.25" (32 mm) apart and are great for building a multi-level robot chassis. Both ends of these 3/16"-wide standoffs have 4-40 threads. The standoffs are sold in packs of 4.
These hexagonal male-female aluminum standoffs keep parts spaced 1.25 (32 mm) apart and are great for building a multi-level robot chassis. Both ends of these 3/16-wide standoffs have 4-40 threads. The standoffs are sold in packs of 4.

Pololu - Claire's dead reckoning robot

Pololu RP5/Rover 5 Expansion Plate RRC07B (Wide) Transparent Gray

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

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

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

Pololu - Paul's dead reckoning robot

Pololu - 100:1 Micro Metal Gearmotor LP 6V with Extended Motor Shaft

M-M threaded bushing M3, 20mm long, white polyamide - Kamami on

100:1 Micro Metal Gearmotor LP 6V with Extended Motor - Pololu